Time perception is a field of study within psychology, cognitive linguistics and neuroscience that refers to the subjective experience, or sense, of time, which is measured by someone's own perception of the duration of the indefinite and unfolding of events. The perceived time interval between two successive events is referred to as perceived duration. Though directly experiencing or understanding another person's perception of time is not possible, such a perception can be objectively studied and inferred through a number of scientific experiments. Some temporal illusions help to expose the underlying neural mechanisms of time perception.
Pioneering work, emphasizing species-specific differences, was conducted by Karl Ernst von Baer.
- 1 Theories
- 2 Philosophical perspectives
- 3 Neuroscientific perspectives
- 4 Types of temporal illusions
- 5 Physiological associations
- 6 See also
- 7 References
- 8 Further reading
- 9 External links
Although there are many theories and computational modeling for time perception mechanism in the brain, followings are a few examples of these theories.
- The strength model of time memory. This posits a memory trace that persists over time, by which one might judge the age of a memory (and therefore how long ago the event remembered occurred) from the strength of the trace. This conflicts with the fact that memories of recent events may fade more quickly than more distant memories.
- The inference model suggests the time of an event is inferred from information about relations between the event in question and other events whose date or time is known.
Another theory involves the brain's subconscious tallying of "pulses" during a specific interval, forming a biological stopwatch. This theory alleges that the brain can run multiple biological stopwatches at one time depending on the type of task one is involved in. The location of these pulses and what these pulses actually consist of is unclear. This model is only a metaphor and does not stand up in terms of brain physiology or anatomy.
Moreover, time perception is usually categorized under following three distinct ranges due to the fact that different range of durations are processed in different part of the brain.
- Sub-second timing or millisecond timing
- Interval timing or seconds-to-minutes timing
- Circadian timing
The specious present is the time duration wherein a state of consciousness is experienced as being in the present. The term was first introduced by the philosopher E. R. Clay in 1882 (E. Robert Kelly), and was further developed by William James. James defined the specious present to be "the prototype of all conceived times... the short duration of which we are immediately and incessantly sensible". In "Scientific Thought" (1930), C. D. Broad further elaborated on the concept of the specious present and considered that the specious present may be considered as the temporal equivalent of a sensory datum. A version of the concept was used by Edmund Husserl in his works and discussed further by Francisco Varela based on the writings of Husserl, Heidegger, and Merleau-Ponty. Although he lived prior to these modern philosophers, Hasidic master Rabbi Nachman of Breslov (1772-1810) remarked that only the present day and present moment are "real,"  and also noted that a person could sleep for fifteen minutes and dream that he or she had lived seventy years.
Although the perception of time is not associated with a specific sensory system, psychologists and neuroscientists suggest that humans do have a system, or several complementary systems, governing the perception of time. Time perception is handled by a highly distributed system involving the cerebral cortex, cerebellum and basal ganglia. One particular component, the suprachiasmatic nucleus, is responsible for the circadian (or daily) rhythm, while other cell clusters appear to be capable of shorter (ultradian) timekeeping. There is some evidence that very short (millisecond) durations are processed by dedicated neurons in early sensory parts of the brain
Professor Warren Meck devised a physiological model for measuring the passage of time. He found the representation of time to be generated by the oscillatory activity of cells in the upper cortex. The frequency of these cells' activity is detected by cells in the dorsal striatum at the base of the forebrain. His model separated explicit timing and implicit timing. Explicit timing is used in estimating the duration of a stimulus. Implicit timing is used to gauge the amount of time separating one from an impending event that is expected to occur in the near future. These two estimations of time do not involve the same neuroanatomical areas. For example, implicit timing often occurs to achieve a motor task, involving the cerebellum, left parietal cortex, and left premotor cortex. Explicit timing often involves the supplementary motor area and the right prefrontal cortex.
In the popular essay "Brain Time", David Eagleman explains that different types of sensory information (auditory, tactile, visual, etc.) are processed at different speeds by different neural architectures. The brain must learn how to overcome these speed disparities if it is to create a temporally unified representation of the external world: "if the visual brain wants to get events correct timewise, it may have only one choice: wait for the slowest information to arrive. To accomplish this, it must wait about a tenth of a second. In the early days of television broadcasting, engineers worried about the problem of keeping audio and video signals synchronized. Then they accidentally discovered that they had around a hundred milliseconds of slop: As long as the signals arrived within this window, viewers' brains would automatically resynchronize the signals". He goes on to say that "This brief waiting period allows the visual system to discount the various delays imposed by the early stages; however, it has the disadvantage of pushing perception into the past. There is a distinct survival advantage to operating as close to the present as possible; an animal does not want to live too far in the past. Therefore, the tenth-of- a-second window may be the smallest delay that allows higher areas of the brain to account for the delays created in the first stages of the system while still operating near the border of the present. This window of delay means that awareness is retroactive, incorporating data from a window of time after an event and delivering a delayed interpretation of what happened."
Experiments have shown that rats can successfully estimate a time interval of approximately 40 seconds, despite having their cortex entirely removed. This suggests that time estimation may be a low level process.
Types of temporal illusions
A temporal illusion is a distortion in the perception of time. Time perception refers to a variety of time-related tasks. For example:
- estimating time intervals, e.g., "When did you last see your primary care physician?";
- estimating time duration, e.g., "How long were you waiting at the doctor's office?"; and
- judging the simultaneity of events (see below for examples).
Short list of types of temporal illusions:
- Telescoping effect: People tend to recall recent events as occurring further back in time than they actually did (backward telescoping) and distant events as occurring more recently than they actually did (forward telescoping).
- Vierordt's law: Shorter intervals tend to be overestimated while longer intervals tend to be underestimated
- Time intervals associated with more changes may be perceived as longer than intervals with fewer changes
- Perceived temporal length of a given task may shorten with greater motivation
- Perceived temporal length of a given task may stretch when broken up or interrupted
- Auditory stimuli may appear to last longer than visual stimuli
- Time durations may appear longer with greater stimulus intensity (e.g., auditory loudness or pitch)
- Simultaneity judgments can be manipulated by repeated exposure to non-simultaneous stimuli
The Kappa effect or perceptual time dilation is a form of temporal illusion verifiable by experiment, wherein the temporal duration between a sequence of consecutive stimuli is thought to be relatively longer or shorter than its actual elapsed time, due to the spatial/auditory/tactile separation between each consecutive stimuli. The kappa effect can be displayed when considering a journey made in two parts that take an equal amount of time. Between these two parts, the journey that covers more distance may appear to take longer than the journey covering less distance, even though they take an equal amount of time.
Eye movements and "Chronostasis"
The perception of space and time undergoes distortions during rapid saccadic eye movements
Chronostasis is a type of temporal illusion in which the first impression following the introduction of a new event or task demand to the brain appears to be extended in time. For example, chronostasis temporarily occurs when fixating on a target stimulus, immediately following a saccade (e.g., quick eye movement). This elicits an overestimation in the temporal duration for which that target stimulus (i.e., postsaccadic stimulus) was perceived. This effect can extend apparent durations by up to 500 ms and is consistent with the idea that the visual system models events prior to perception. The most well-known version of this illusion is known as the stopped-clock illusion, wherein a subject's first impression of the second-hand movement of an analog clock, subsequent to one's directed attention (i.e., saccade) to the clock, is the perception of a slower-than-normal second-hand movement rate (the seconds hand of the clock may seemingly temporarily freeze in place after initially looking at it).
The occurrence of chronostasis extends beyond the visual domain into the auditory and tactile domains. In the auditory domain, chronostasis and duration overestimation occur when observing auditory stimuli. One common example is a frequent occurrence when making telephone calls. If, while listening to the phone's dial tone, research subjects move the phone from one ear to the other, the length of time between rings appears longer. In the tactile domain, chronostasis has persisted in research subjects as they reach for and grasp objects. After grasping a new object, subjects overestimate the time in which their hand has been in contact with this object. In other experiments, subjects turning a light on with a button were conditioned to experience the light before the button press.
In an experiment, participants were told to stare at an "x" symbol on a computer screen whereby a moving blue doughnut-like ring repeatedly circled the fixed "x" point. Occasionally, the ring would display a white flash for a split second that physically overlapped the ring's interior. However, when asked what was perceived, participants responded that they saw the white flash lagging behind the center of the moving ring. In other words, despite the reality that the two retinal images were actually spatially aligned, the flashed object was usually observed to trail a continuously moving object in space — a phenomenon referred to as the flash-lag effect.
The first proposed explanation, called the 'motion extrapolation' hypothesis, is that the visual system extrapolates the position of moving objects but not flashing objects when accounting for neural delays (i.e., the lag time between the retinal image and the observer's perception of the flashing object). The second proposed explanation by David Eagleman and Sejnowski, called the 'latency difference' hypothesis, is that the visual system processes moving objects at a faster rate than flashed objects. In the attempt to disprove the first hypothesis, David Eagleman conducted an experiment in which the moving ring suddenly reverses direction to spin in the other way as the flashed object briefly appears. If the first hypothesis were correct, we would expect that, immediately following reversal, the moving object would be observed as lagging behind the flashed object. However, the experiment revealed the opposite — immediately following reversal, the flashed object was observed as lagging behind the moving object. This experimental result supports of the 'latency difference' hypothesis. A recent study tries to reconcile these different approaches by approaching perception as an inference mechanism aiming at describing what is happening at the present time.
Humans typically overestimate the perceived duration of the initial and final event in a stream of identical events.
The oddball effect may serve an evolutionarily adapted “alerting” function and is consistent with reports of time slowing down in threatening situations. The effect seems to be strongest for images that are expanding in size on the retina, in other words, that are "looming" or approaching the viewer, and the effect can be eradicated for oddballs that are contracting or perceived to be receding from the viewer. The effect is also reduced or reversed with a static oddball presented amongst a stream of expanding stimuli.
Initial studies suggested that this oddball-induced “subjective time dilation” expanded the perceived duration of oddball stimuli by 30–50% but subsequent research has reported more modest expansion of around 10% or less. The direction of the effect, whether the viewer perceives an increase or a decrease in duration, also seems to be dependent upon the stimulus used.
Reversal of temporal order judgment
Numerous experimental findings suggest that temporal order judgments of actions preceding effects can be reversed under special circumstances. Experiments have shown that sensory simultaneity judgments can be manipulated by repeated exposure to non-simultaneous stimuli. In an experiment conducted by David Eagleman, a temporal order judgment reversal was induced in subjects by exposing them to delayed motor consequences. In the experiment, subjects played various forms of video games. Unknown to the subjects, the experimenters introduced a fixed delay between the mouse movements and the subsequent sensory feedback. For example, a subject may not see a movement register on the screen until 150 milliseconds after the mouse had moved. Participants playing the game quickly adapted to the delay and felt as though there was less delay between their mouse movement and the sensory feedback. Shortly after the experimenters removed the delay, the subjects commonly felt as though the effect on the screen happened just before they commanded it. This work addresses how the perceived timing of effects is modulated by expectations, and the extent to which such predictions are quickly modifiable. In an experiment conducted by Haggard and colleagues in 2002, participants pressed a button that triggered a flash of light at a distance after a slight delay of 100 milliseconds. By repeatedly engaging in this act, participants had adapted to the delay (i.e., they experienced a gradual shortening in the perceived time interval between pressing the button and seeing the flash of light). The experimenters then showed the flash of light instantly after the button was pressed. In response, subjects often thought that the flash (the effect) had occurred before the button was pressed (the cause). Additionally, when the experimenters slightly reduced the delay, and shortened the spatial distance between the button and the flash of light, participants had often claimed again to have experienced the effect before the cause.
Several experiments also suggest that temporal order judgment of a pair of tactile stimuli delivered in rapid succession, one to each hand, is noticeably impaired (i.e., misreported) by crossing the hands over the midline. However, congenitally blind subjects showed no trace of temporal order judgment reversal after crossing the arms. These results suggest that tactile signals taken in by the congenitally blind are ordered in time without being referred to a visuospatial representation. Unlike the congenitally blind subjects, the temporal order judgments of the late-onset blind subjects were impaired when crossing the arms to a similar extent as non-blind subjects. These results suggest that the associations between tactile signals and visuospatial representation is maintained once it is accomplished during infancy. Some research studies have also found that the subjects showed reduced deficit in tactile temporal order judgments when the arms were crossed behind their back than when they were crossed in front.
Tachypsychia is a neurological condition that alters the perception of time, usually induced by physical exertion, drug use, or a traumatic event. For someone affected by tachypsychia, time perceived by the individual either lengthens, making events appear to slow down, or contracts, objects appearing as moving in a speeding blur.
Some genetic polymorphisms are associated with tachypsychia: COMT Val158Met, DRD2/ANKK1-Taq1A and SLC6A3 3'-UTR VNTR. These gene polymorphisms affect the expression of D2 dopamine receptors primarily in the striatum (DRD2/ANKK1-Taq1A polymorphism).
Effects of emotional states
Research has suggested the feeling of awe has the ability to expand one's perceptions of time availability. Awe can be characterized as an experience of immense perceptual vastness that coincides with an increase in focus. Consequently, it is conceivable that one's temporal perception would slow down when experiencing awe.
Possibly related to the oddball effect, research suggests that time seems to slow down for a person during dangerous events (such as a car accident, a robbery, or when a person perceives a potential predator or mate), or when a person skydives or bungee jumps, where they're capable of complex thoughts in what would normally be the blink of an eye (See Fight-or-flight response). This reported slowing in temporal perception may have been evolutionarily advantageous because it may have enhanced one's ability to intelligibly make quick decisions in moments that were of critical importance to our survival. However, even though observers commonly report that time seems to have moved in slow motion during these events, it is unclear whether this is a function of increased time resolution during the event, or instead an illusion created by the remembering of an emotionally salient event.
A strong time dilation effect has been reported for perception of objects that were looming, but not of those retreating, from the viewer, suggesting that the expanding discs — which mimic an approaching object — elicit self-referential processes which act to signal the presence of a possible danger. Anxious people, or those in great fear, experience greater "time dilation" in response to the same threat stimuli due to higher levels of epinephrine, which increases brain activity (an adrenaline rush). In such circumstances, an illusion of time dilation could assist an efficacious escape. When exposed to a threat, three-year-old children were observed to exhibit a similar tendency to overestimate elapsed time.
Research suggests that the effect appears only at the point of retrospective assessment, rather than occurring simultaneously with events as they happened. Perceptual abilities were tested during a frightening experience — a free fall — by measuring people's sensitivity to flickering stimuli. The results showed that the subjects' temporal resolution was not improved as the frightening event was occurring. Events appear to have taken longer only in retrospect, possibly because memories were being more densely packed during the frightening situation.
People shown extracts from films known to induce fear often overestimated the elapsed time of a subsequently presented visual stimulus, whereas people shown emotionally neutral clips (weather forecasts and stock market updates) or those known to evoke feelings of sadness showed no difference. It is argued that fear prompts a state of arousal in the amygdala, which increases the rate of a hypothesized "internal clock". This could be the result of an evolved defensive mechanism triggered by a threatening situation.
Changes with age
Psychologists have found that the subjective perception of the passing of time tends to speed up with increasing age in humans. This often causes people to increasingly underestimate a given interval of time as they age. This fact can likely be attributed to a variety of age-related changes in the aging brain, such as the lowering in dopaminergic levels with older age; however, the details are still being debated.
Very young children literally "live in time" before gaining an awareness of its passing. A child will first experience the passing of time when he or she can subjectively perceive and reflect on the unfolding of a collection of events. A child's awareness of time develops during childhood when the child's attention and short-term memory capacities form — this developmental process is thought to be dependent on the slow maturation of the prefrontal cortex and hippocampus.
One day to an 11-year-old would be approximately 1/4,000 of their life, while one day to a 55-year-old would be approximately 1/20,000 of their life. This helps to explain why a random, ordinary day may therefore appear longer for a young child than an adult. The short term appears to go faster in proportion to the square root of the perceiver's age. So a year would be experienced by a 55-year-old as passing approximately 2¼ times more quickly than a year experienced by an 11-year-old. If long-term time perception is based solely on the proportionality of a person's age, then the following four periods in life would appear to be quantitatively equal: ages 5–10 (1x), ages 10–20 (2x), ages 20–40 (4x), age 40–80 (8x).
The common explanation is that most external and internal experiences are new for young children but repetitive for adults. Children have to be extremely engaged (i.e. dedicate many neural resources or significant brain power) in the present moment because they must constantly reconfigure their mental models of the world to assimilate it and manage behaviour properly. Adults however may rarely need to step outside mental habits and external routines. When an adult frequently experiences the same stimuli, they seem "invisible" because they have already been sufficiently and effectively mapped by the brain. This phenomenon is known as neural adaptation. Thus, the brain will record fewer densely rich memories during these frequent periods of disengagement from the present moment. Consequently, the subjective perception is often that time passes by at a faster rate with age.
Effects of drugs
In a 2007 study, psilocybin was found to significantly impair the ability to reproduce interval durations longer than 2.5 seconds, significantly impair synchronizing motor actions (taps on a computer keyboard) with regularly occurring tones, and impair the ability to keep tempo when asked to tap on a key at a self-paced but consistent interval.[unreliable medical source] In 1955, British MP Christopher Mayhew took mescaline hydrochloride in an experiment under the guidance of his friend, Dr Humphry Osmond. On the BBC documentary The Beyond Within, he described that half a dozen times during the experiment, he had "a period of time that didn't end for [him]".
Stimulants can lead both humans and rats to overestimate time intervals, while depressants can have the opposite effect. The level of activity in the brain of neurotransmitters such as dopamine and norepinephrine may be the reason for this. The dopaminergic system has a particularly strong connection with one's perception of time. Drugs that activate dopamine receptors speed up one's perception of time, while dopamine antagonists cause one to feel that time is passing slowly.
The effect of cannabis on time perception has been studied with inconclusive results.
Effects of body temperature
Time perception may speed up as body temperature rises, and slow down as body temperature lowers. This is especially true during stressful events.
Effects of clinical disorders
- Evans, Vyvyan (2013). Language and time: a cognitive linguistics approach. Cambridge: Cambridge University Press. ISBN 978-1-107-04380-0. https://books.google.com/books/about/Language_and_Time.html?id=2deaAAAAQBAJ.
- Livni, Ephrat (8 January 2019). "Physics explains why time passes faster as you age". Quartz. https://qz.com/1516804/physics-explains-why-time-passes-faster-as-you-age/. Retrieved 21 March 2019.
- Duke University (21 March 2019). "It's spring already? Physics explains why time flies as we age - A slowdown in image processing speeds up our perception of time passing as we age". EurekAlert!. https://www.eurekalert.org/pub_releases/2019-03/du-isa032019.php. Retrieved 21 March 2019.
- Karl Ernst von Baer, Welche Auffassung der lebenden Natur ist die richtige?, Berlin, 1862
- Le Poidevin R. "The Experience and Perception of Time". http://plato.stanford.edu/entries/time-experience. Retrieved 2009-10-22.
- About time: inventing the fourth dimension. Cambridge, Mass.: MIT Press. 1990. ISBN 978-0-262-06133-9.
- "Memory for the time of past events". Psychological Bulletin 113 (1): 44–66. 1993. doi:10.1037/0033-2909.113.1.44.
- Falk, Dan (Jan 2013). "Do Humans Have a Biological Stopwatch?". Smithsonian Magazine. http://www.smithsonianmag.com/science-nature/do-humans-have-a-biological-stopwatch-164710819/?no-ist. Retrieved May 1, 2014.
- Gozlan, Marc (2 Jan 2013). "A stopwatch on the brain's perception of time". Guardian News and Media Limited. Archived from the original on 4 January 2014. https://web.archive.org/web/20140104205501/http://www.theguardian.com/science/2013/jan/01/psychology-time-perception-awareness-research. Retrieved 4 January 2014. Cite error: Invalid
<ref>tag; name "Guardian" defined multiple times with different content
- Buhusi, Catalin V.; Cordes, Sara (2011). "Time and Number: The Privileged Status of Small Values in the Brain" (in English). Frontiers in Integrative Neuroscience 5. doi:10.3389/fnint.2011.00067. ISSN 1662-5145. https://www.frontiersin.org/articles/10.3389/fnint.2011.00067/full.
- The principles of psychology. New York: H. Holt and Company.. 1893. p. 609. https://books.google.com/books?id=JLcAAAAAMAAJ.
- Anonymous (E. Robert Kelly), The Alternative: A Study in Psychology. London: Macmillan and Co.,1882.
- Andersen, Holly; Grush, Rick (2009). "A brief history of time-consciousness: historical precursors to James and Husserl". Journal of the History of Philosophy 47 (2): 277–307. doi:10.1353/hph.0.0118. Archived from the original on 2008-02-16. https://web.archive.org/web/20080216100320/http://mind.ucsd.edu/papers/bhtc/Andersen%26Grush.pdf. Retrieved 2008-02-02.
- "The Specious Present: A Neurophenomenology of Time Consciousness." In Petitot, Varela, Pacoud & Roy (eds.), Naturalizing Phenomenology. Stanford University Press.
- Sichot HaRan 288, Likutey Tefillot II, 33.
- Likutey Moharan II, 61
- "The evolution of brain activation during temporal processing". Nature Neuroscience 4 (3): 317–23. March 2001. doi:10.1038/85191. PMID 11224550 (27 February 2001).
- "The evolution of brain activation during temporal processing". Nature Neuroscience 4 (3): 317–23. March 2001. doi:10.1038/85191. PMID 11224550.
- Heron J, Aaen-Stockdale C, Hotchkiss J, Roach NW, McGraw PV, Whitaker D (February 2012). "Duration channels mediate human time perception". Proceedings of the Royal Society B: Biological Sciences 279 (1729): 690–8. doi:10.1098/rspb.2011.1131. PMID 21831897.
- Heron J, Hotchkiss J, Aaen-Stockdale C, Roach N.W, & Whitaker, D. (2013). "A neural hierarchy for illusions of time: duration adaptation precedes multisensory integration.". Journal of Vision 13 (14): 4. doi:10.1167/13.14.4. PMID 24306853.
- Eagleman, David M. (23 June 2009). "Brain Time". Edge Foundation. Archived from the original on 21 December 2013. https://web.archive.org/web/20131221170926/http://www.edge.org/conversation/brain-time.
- Macey, Samuel L. (1994). Encyclopedia of Time (1st ed.). Routledge Publishing. p. 555. ISBN 978-0-8153-0615-3.
- Brockman, Max (2009). What's Next?: Dispatches on the Future of Science. United States: Vintage Books. p. 162. ISBN 978-0-307-38931-2. https://archive.org/details/whatsnextdispatc0000unse.
- Eagleman DM (2009-06-23). "Brain Time". Edge Foundation. Archived from the original on 2013-08-05. https://web.archive.org/web/20130805000331/http://www.edge.org/conversation/brain-time.
- "Performance of Decorticated Rats on Fixed Interval and Fixed Time Schedules". The European Journal of Neuroscience 1 (5): 461–470. September 1989. doi:10.1111/j.1460-9568.1989.tb00352.x. PMID 12106131.
- Animal learning and cognition. Boston: Academic Press. 1994. ISBN 978-0-12-161953-4.
- It Seems Like Only Yesterday: The Nature and Consequences of Telescoping Errors in Marketing Research. Journal of Consumer Psychology. Archived from the original on 2012-07-01. https://web.archive.org/web/20120701102333/http://www.questia.com/googleScholar.qst.
- "When do auditory/visual differences in duration judgements occur?". Quarterly Journal of Experimental Psychology 59 (10): 1709–24. October 2006. doi:10.1080/17470210500314729. PMID 16945856. https://semanticscholar.org/paper/cd1766e3ad87de3a43917e74933e5787472071c4.
- "Studies of auditory-visual differences in human time judgment. 1. Sounds are judged longer than lights". Perceptual and Motor Skills 39 (1): 63–82. August 1974. doi:10.2466/pms.19188.8.131.52. PMID 4415924.
- Meck, Warren H., ed (2003). "Modality differences in interval timing: Attention, clock speed, and memory". Functional and neural mechanisms of interval timing. Frontiers in Neuroscience. 19. Boca Raton, FL: CRC Press. pp. 209–233. doi:10.1201/9780203009574.ch8. ISBN 978-0-8493-1109-3. http://psycnet.apa.org/psycinfo/2003-00556-008.
- "Why "sounds are judged longer than lights": application of a model of the internal clock in humans". The Quarterly Journal of Experimental Psychology. B, Comparative and Physiological Psychology 51 (2): 97–120. May 1998. doi:10.1080/713932672. PMID 9621837. Archived from the original on 2013-04-21. https://web.archive.org/web/20130421045901/http://www.keele.ac.uk/media/keeleuniversity/facnatsci/schpsych/weardenpublications/weardenetal1998.pdf.
- Goldreich, Daniel (28 March 2007). "A Bayesian Perceptual Model Replicates the Cutaneous Rabbit and Other Tactile Spatiotemporal Illusions". PLoS ONE 2 (3): e333. doi:10.1371/journal.pone.0000333. PMID 17389923. Bibcode: 2007PLoSO...2..333G.
- Wada Y, Masuda T, Noguchi K, 2005, "Temporal illusion called 'kappa effect' in event perception" Perception 34 ECVP Abstract Supplement
- Cicchini G, Binda P and Morrone M (2009). A model for the distortions of space and time perception during saccadic movement. Front. Syst. Neurosci. Conference Abstract: Computational and systems neuroscience 2009. doi:10.3389/conf.neuro.06.2009.03.349
- "Illusory perceptions of space and time preserve cross-saccadic perceptual continuity". Nature 414 (6861): 302–5. November 2001. doi:10.1038/35104551. PMID 11713528. Bibcode: 2001Natur.414..302Y. http://openaccess.city.ac.uk/333/2/Illusory_perceptions_of_space_and_time_preserve_cross-saccadic_perceptual_continuity.pdf.
- "Spatial consequences of bridging the saccadic gap". Vision Research 46 (4): 545–55. February 2006. doi:10.1016/j.visres.2005.04.019. PMID 16005489.
- "Spatio-temporal topography of saccadic overestimation of time". Vision Research 83: 56–65. May 2013. doi:10.1016/j.visres.2013.02.013. PMID 23458677.
- "Manual chronostasis: tactile perception precedes physical contact". Current Biology 13 (13): 1134–9. July 2003. doi:10.1016/S0960-9822(03)00413-5. PMID 12842013.
- "Consistent chronostasis effects across saccade categories imply a subcortical efferent trigger". Journal of Cognitive Neuroscience 16 (5): 839–47. June 2004. doi:10.1162/089892904970780. PMID 15200711.
- "The mystery of the stopped clock illusion". BBC - Future - Health -. 2012-08-27. Archived from the original on 2013-01-20. https://web.archive.org/web/20130120100128/http://www.bbc.com/future/story/20120827-how-to-make-time-stand-still. Retrieved 2012-12-09.
- Nijhawan, Romi (2010). Space and Time in Perception and Action. Cambridge, UK: Cambridge University Press. ISBN 978-0-521-86318-6.
- "Auditory chronostasis: hanging on the telephone". Current Biology 12 (20): 1779–81. October 2002. doi:10.1016/S0960-9822(02)01219-8. PMID 12401174.
- Kotler, Steven (12 April 2010). "When Life Flashes Before Your Eyes: A 15-Story Drop to Study the Brain's Internal Timewarp". Bonnier Corporation. Archived from the original on 11 October 2014. https://web.archive.org/web/20141011234410/http://www.popsci.com/science/article/2010-03/how-time-flies.
- Eagleman, DM; Sejnowski, TJ (2007). "Flash-Lag Effect". Archived from the original on 2014-08-01. https://web.archive.org/web/20140801091656/http://eaglemanlab.net/flashlag/.
- "Flash-lag effect: differential latency, not postdiction". Science 290 (5494): 1051a–1051. November 2000. doi:10.1126/science.290.5494.1051a. PMID 11184992. http://eaglemanlab.net/papers/EagleSejScience3.pdf.
- "The flash-lag effect as a motion-based predictive shift". PLoS Computational Biology 13 (1): e1005068. January 2017. doi:10.1371/journal.pcbi.1005068. PMID 28125585. Bibcode: 2017PLSCB..13E5068K.
- "Duration illusions in a train of visual stimuli". Perception 24 (10): 1177–87. 1995. doi:10.1068/p241177. PMID 8577576.
- "Attention and the subjective expansion of time". Perception & Psychophysics 66 (7): 1171–89. October 2004. doi:10.3758/BF03196844. PMID 15751474.
- "Subjective time dilation: spatially local, object-based, or a global visual experience?". Journal of Vision 9 (2): 4.1–11. February 2009. doi:10.1167/9.2.4. PMID 19271914.
- "Distortions of subjective time perception within and across senses". PLOS ONE 3 (1): e1437. January 2008. doi:10.1371/journal.pone.0001437. PMID 18197248. Bibcode: 2008PLoSO...3.1437V.
- "Perceived duration of expected and unexpected stimuli". Psychological Research 70 (2): 77–87. March 2006. doi:10.1007/s00426-004-0195-4. PMID 15609031.
- "Asymmetric cross-modal effects in time perception". Acta Psychologica 130 (3): 225–34. March 2009. doi:10.1016/j.actpsy.2008.12.008. PMID 19195633.
- "Does the asymmetry effect inflate the temporal expansion of odd stimuli?". Psychological Research 74 (1): 90–8. January 2010. doi:10.1007/s00426-008-0187-x. PMID 19034503.
- "Perceived time is spatial frequency dependent". Vision Research 51 (11): 1232–8. June 2011. doi:10.1016/j.visres.2011.03.019. PMID 21477613.
- "Motor-sensory recalibration leads to an illusory reversal of action and sensation". Neuron 51 (5): 651–9. September 2006. doi:10.1016/j.neuron.2006.08.006. PMID 16950162. Archived from the original on 2013-09-28. https://web.archive.org/web/20130928021519/http://www.eaglemanlab.net/papers/StetsonetalNeuron2006.pdf.
- "Human time perception and its illusions". Current Opinion in Neurobiology 18 (2): 131–6. April 2008. doi:10.1016/j.conb.2008.06.002. PMID 18639634.
- "Reversal of subjective temporal order due to arm crossing". Nature Neuroscience 4 (7): 759–65. July 2001. doi:10.1038/89559. PMID 11426234. Archived from the original on 2015-04-02. https://web.archive.org/web/20150402142713/http://wexler.free.fr/library/files/yamamoto%20(2001)%20reversal%20of%20subjective%20temporal%20order%20due%20to%20arm%20crossing.pdf.
- "The temporal order judgement of tactile and nociceptive stimuli is impaired by crossing the hands over the body midline". Pain 154 (2): 242–7. February 2013. doi:10.1016/j.pain.2012.10.010. PMID 23200703. Archived from the original on 2013-09-28. https://web.archive.org/web/20130928081457/http://www.bodyinmind.org/wp-content/uploads/1-s2.0-S0304395912005611-main.pdf.
- "Neural correlates of tactile temporal-order judgment in humans: an fMRI study". Cerebral Cortex 23 (8): 1952–64. August 2013. doi:10.1093/cercor/bhs179. PMID 22761307.
- Amato, Ivan (7 June 2018). "When Bad Things Happen in Slow Motion". Nautilus (science magazine). http://nautil.us/issue/61/coordinates/when-bad-things-happen-in-slow-motion-rp. Retrieved 7 June 2018.
- Marinho V, Oliveira T, Rocha K, Ribeiro J, Magalhães F, Bento T, Pinto GR, Velasques B, Ribeiro P, Di Giorgio L, Orsini M, Gupta DS, Bittencourt J, Bastos VH, Teixeira S (2018). "The dopaminergic system dynamic in the time perception: a review of the evidence.". Int J Neurosci 128: 262–282. doi:10.1080/00207454.2017.1385614. PMID 28950734.
- "Awe expands people's perception of time, alters decision making, and enhances well-being". Psychological Science 23 (10): 1130–6. October 2012. doi:10.1177/0956797612438731. PMID 22886132. http://www.carlsonschool.umn.edu/assets/lib/assets/AssetLibrary/2012/Rudd_Vohs_Aaker_2012_psych%20science.pdf.
- "David dives in". justRegional publishing. 13 Jul 2013. Archived from the original on 26 August 2016. https://web.archive.org/web/20160826013530/http://content.yudu.com/Library/A2ac0l/JustCromerJuly132013/resources/index.htm?referrerUrl=http%3A%2F%2Ffree.yudu.com%2Fitem%2Fdetails%2F1044663%2FJust-Cromer-July-13--2013. Retrieved 13 July 2013.
- Geoghagen, Tom (2007-08-02). "Turn back the clock". BBC News Magazine. http://news.bbc.co.uk/2/hi/uk_news/magazine/6926500.stm.
- Why top sport stars might have 'more time' on the ball by Jonathan Amos Science correspondent, BBC News
- "Is subjective duration a signature of coding efficiency?". Philosophical Transactions of the Royal Society B: Biological Sciences 364 (1525): 1841–1851. 2009. doi:10.1098/rstb.2009.0026. PMID 19487187.
- "When time slows down: The influence of threat on time perception in anxiety". Cognition and Emotion 24 (2): 255–263. 2010. doi:10.1080/02699930903387603. https://semanticscholar.org/paper/497427e3551a5acafa4383441c383a25121f76c1.
- "Attention and the subjective expansion of time". Percept. Psychophys. 66 (7): 1171–1189. 2004. doi:10.3758/bf03196844. PMID 15751474.
- Why Time Seems to Slow Down in Emergencies by By Charles Q. Choi, Live Science Contributor
- "Time perception, depression and sadness". Behavioural Processes 80 (2): 169–76. February 2009. doi:10.1016/j.beproc.2008.11.012. PMID 19073237. Archived from the original on 2014-01-04. https://web.archive.org/web/20140104031908/http://cerca.labo.univ-poitiers.fr/IMG/pdf_BP09-GilColl.pdf.
- "Does time really slow down during a frightening event?". PLOS ONE 2 (12): e1295. December 2007. doi:10.1371/journal.pone.0001295. PMID 18074019. Bibcode: 2007PLoSO...2.1295S.
- "Emotion and time perception: effects of film-induced mood". Frontiers in Integrative Neuroscience 5: 33. 2011. doi:10.3389/fnint.2011.00033. PMID 21886610.
- "Age-related changes in midbrain dopaminergic regulation of the human reward system". Proceedings of the National Academy of Sciences of the United States of America 105 (39): 15106–11. September 2008. doi:10.1073/pnas.0802127105. PMID 18794529.
- "The correlative triad among aging, dopamine, and cognition: current status and future prospects". Neuroscience and Biobehavioral Reviews 30 (6): 791–807. 2006. doi:10.1016/j.neubiorev.2006.06.005. PMID 16901542. http://edoc.mpg.de/288522.
- "Neuropharmacology of timing and time perception". Brain Research. Cognitive Brain Research 3 (3–4): 227–42. June 1996. doi:10.1016/0926-6410(96)00009-2. PMID 8806025. Archived from the original on 2013-10-29. https://web.archive.org/web/20131029135616/http://homepage.psy.utexas.edu/homepage/class/Psy355/Gilden/meck.pdf.
- "Experience and the developing prefrontal cortex". Proceedings of the National Academy of Sciences of the United States of America 109 Suppl 2: 17186–93. October 2012. doi:10.1073/pnas.1121251109. PMID 23045653.
- Adler R (1999-12-25). "Look how time flies . . .". New Scientist. Archived from the original on 2011-06-14. https://web.archive.org/web/20110614233936/http://www.newscientist.com/article/mg16422180.900-look-how-time-flies. Retrieved 2009-10-22.
- Jo DiLonardo, Mary (1994-02-06). "Time Does Fly As We Grow Older". Chicago Tribune. Archived from the original on 2016-04-25. https://web.archive.org/web/20160425120403/http://articles.chicagotribune.com/1994-02-06/features/9402060210_1_psychology-professor-adult-school-year.
- Cooper BB (2013-07-02). "The science of time perception: stop it slipping away by doing new things". The Buffer Blog. Archived from the original on 2013-08-16. http://archive.wikiwix.com/cache/20130816194820/http://blog.bufferapp.com/the-science-of-time-perception-how-to-make-your-days-longer.
- "Effects of psilocybin on time perception and temporal control of behaviour in humans". Journal of Psychopharmacology 21 (1): 50–64. January 2007. doi:10.1177/0269881106065859. PMID 16714323. https://semanticscholar.org/paper/14c0964b7db6ec7906f7d6b0293031f3b3f4c411.
- "Impaired time perception and motor timing in stimulant-dependent subjects". Drug and Alcohol Dependence 90 (2–3): 183–92. October 2007. doi:10.1016/j.drugalcdep.2007.03.005. PMID 17434690.
- "Differential effects of cocaine and ketamine on time estimation: implications for neurobiological models of interval timing". Pharmacology Biochemistry and Behavior 85 (1): 114–22. September 2006. doi:10.1016/j.pbb.2006.07.019. PMID 16920182.
- "Marijuana and ethanol: differential effects on time perception, heart rate, and subjective response". Psychopharmacology 49 (3): 275–9. September 1976. doi:10.1007/BF00426830. PMID 826945.
- "Self in time: imagined self-location influences neural activity related to mental time travel". The Journal of Neuroscience 28 (25): 6502–7. June 2008. doi:10.1523/JNEUROSCI.5712-07.2008. PMID 18562621.
- "Is there a common dopaminergic basis of time perception and reaction time?". Neuropsychobiology 21 (1): 37–42. 1989. doi:10.1159/000118549. PMID 2573003.
- "The effect of cannabis on perception of time: a critical review". Current Pharmaceutical Design 18 (32): 4915–4922. January 2012. doi:10.2174/138161212802884852. ISSN 1873-4286. PMID 22716134.
- "Feeling the heat: body temperature and the rate of subjective time, revisited". The Quarterly Journal of Experimental Psychology. B, Comparative and Physiological Psychology 48 (2): 129–41. May 1995. PMID 7597195.
- "Timing, space and ADHD: the dopamine theory revisited". The Australian and New Zealand Journal of Psychiatry 35 (4): 504–11. August 2001. doi:10.1046/j.1440-1614.2001.00923.x. PMID 11531733.
- Le Poidevin, Robin (Winter 2004). "The Experience and Perception of Time". in Zalta, Edward N.. http://plato.stanford.edu/archives/win2004/entries/time-experience/.
- "Chapter II, The Specious Present". The adversaries of the sceptic; or, The specious present, a new inquiry into human knowledge. London: S. Sonnenschein &.. 1901. pp. 36–56. https://books.google.com/books?id=uZ5RAAAAMAAJ&pg=PA36&source=gbs_toc_r&cad=0_0.
- "Selectivity of attention and the perception of duration". Perception 2 (1): 101–5. 1973. doi:10.1068/p020101. PMID 4777562. https://semanticscholar.org/paper/8a0b62d34c26e6239c1ccabba804d79462c94aec.
- "Attention and interference in prospective and retrospective timing". Perception 21 (4): 545–57. 1992. doi:10.1068/p210545. PMID 1437469.
- "Time and the brain: how subjective time relates to neural time". The Journal of Neuroscience 25 (45): 10369–71. November 2005. doi:10.1523/JNEUROSCI.3487-05.2005. PMID 16280574.
- "Evidence for a Short-Period Internal Clock in Humans". Journal of Scientific Exploration 2 (2): 203–216. 1988. Archived from the original on 2011-08-09. https://web.archive.org/web/20110809232323/http://www.scientificexploration.org/journal/jse_02_2_slanger.pdf. Retrieved 2011-10-02.
- The images of time: an essay on temporal representation. Oxford [Oxfordshire]: Oxford University Press. 2007. ISBN 978-0-19-926589-3. https://books.google.com/books?id=l0qrewXYnOYC&lpg=PA115&dq.
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https://en.wikipedia.org/wiki/Time perception was the original source. Read more.