Effects of visual flicker on subjective time in a temporal bisection task

Ortega, Laura; López, Florente

doi:10.1016/j.beproc.2008.02.004

Cited by 62 publications

(76 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In agreement with the previous studies (Burle & Bonnet, 1997;Burle & Casini, 2001;Ortega & López, 2008), the psychometric function in Figure 5B shows that the 25-Hz series lasting for 1,000 msec was generally perceived as being longer than the 5-Hz series of the same duration. The intercept of the psychometric function with P .5 shows that the 25-Hz series lasting for 937 msec was equivalent in subjective duration to the 5-Hz series lasting for 1,000 msec.…”

Section: Resultssupporting

confidence: 92%

“…Duration of a rapid series of tones (Burle & Bonnet, 1997;Burle & Casini, 2001;Ortega & López, 2008) or duration of a series of flickering visual stimuli (Kanai, Paffen, Hogendoorn, & Verstraten, 2006) themselves are perceived as being longer than that of a static stimulus of the same duration. To explain these changes in time perception, researchers generally hypothesize that some kind of internal pacemaker (Creelman, 1962;Treisman, 1963) is accelerated by the repetitive stimulation.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Shortening of subjective tone intervals followed by repetitive tone stimuli

Ono

Kitazawa

2010

Attention, Perception, & Psychophysics

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 92%

mentioning

confidence: 99%

Shortening of subjective tone intervals followed by repetitive tone stimuli

Ono

Kitazawa

2010

Attention, Perception, & Psychophysics

View full text Add to dashboard Cite

“…The internal clock speeds up, thus causing more pulses to accumulate for the same physical unit of time. This arousal-induced temporal overestimation has been documented in numerous studies that have manipulated the level of arousal by using click or flicker trains (Treisman et al 1990;Penton-Voak et al 1996;Droit-Volet & Wearden 2002;Ortega & Lopez 2008), by changing body temperature (Wearden & Penton-Voak 1995), or by administrating drugs that modulate arousal by altering the effective level of dopamine in the brain. For example, following the administration of dopanimergic agonists (methamphetamine or cocaine), participants either overestimate the elapsed interval or respond earlier, a phenomenon that is characteristic of an increase in the clock rate (Maricq et al 1981;Cheng et al 2007).…”

Section: The Internal Clock Models and The Explanatory Mechanisms Of mentioning

confidence: 99%

The time–emotion paradox

Droit‐Volet

Gil

2009

Phil. Trans. R. Soc. B

287

219

View full text Add to dashboard Cite

The present manuscript discusses the time-emotion paradox in time psychology: although humans are able to accurately estimate time as if they possess a specific mechanism that allows them to measure time (i.e. an internal clock), their representations of time are easily distorted by the context. Indeed, our sense of time depends on intrinsic context, such as the emotional state, and on extrinsic context, such as the rhythm of others' activity. Existing studies on the relationships between emotion and time suggest that these contextual variations in subjective time do not result from the incorrect functioning of the internal clock but rather from the excellent ability of the internal clock to adapt to events in one's environment. Finally, the fact that we live and move in time and that everything, every act, takes more or less time has often been neglected. Thus, there is no unique, homogeneous time but instead multiple experiences of time. Our subjective temporal distortions directly reflect the way our brain and body adapt to these multiple time scales.

show abstract

“…Other studies, however, use large groups of participants and collect less data from each participant. In this case, authors usually draw inferences from pooling the data across participants (e.g., Ono & Kitazawa, 2009;Ortega & López, 2008;Wearden, Wearden, & Rabbitt, 1997). Data analysis is then performed on the aggregated data set, which is statistically more stable than each individual data set.…”

Section: Analysis Of Aggregated Datamentioning

confidence: 99%

DLs in reminder and 2AFC tasks: Data and models

Ulrich

2010

Attention, Perception, & Psychophysics

View full text Add to dashboard Cite

Lapid, Ulrich, and Rammsayer (2008) compared the discrimination performance for two psychophysical methods -that is, the (temporal) two-alternative forced choice (2AFC) task and the reminder task. They reported generally higher difference limens (DLs) for the 2AFC than for the reminder task and attributed this difference to a particular feature of the 2AFC task. García-Pérez and Alcalá-Quintana (2010) performed a reanalysis of Lapid et al.'s data, using a different psychometric function than Lapid et al. In contrast to Lapid et al., these authors reach the opposite conclusion that the two tasks produce similar DL estimates. In this response to their article, it will be shown that DLs are indeed larger in 2AFC tasks than in reminder tasks, contrary to García-Pérez and Alcalá-Quintana's reanalysis. In particular, (1) the conclusions of Lapid et al. are confirmed by further reanalyses that rely on fewer assumptions than do either the original analyses of Lapid et al. or the reanalyses of García-Pérez and Alcalá-Quintana, and (2) the reanalyses of García-Pérez and Alcalá-Quintana are based on demonstrably false assumptions that lead to inappropriate estimates of DL.This article consists of three parts. In the first part, I outline the assumptions of the psychometric functions employed in Lapid et al. (2008). This part also introduces the mathematical/technical background of 2AFC psychometric functions and the customary approaches for estimating the DL in 2AFC tasks. Readers who are interested mainly in the data reanalysis should skip this part. In the second part, I rechecked the data in Lapid et al. to settle the empirical question. I performed analyses that did not require specific assumptions about the proper psychometric function or about lapses. In addition, I also performed analyses with an improved version of García-Pérez and Alcalá-Quintana's (2010) logistic psychometric function. The results of these were clear-cut. DLs are meaningfully larger (by about 50% or slightly more) for the 2AFC than for the reminder task. At the end of this second part, I review the work of Ulrich and Vorberg (2009) and explain why this effect occurs. In the third part, I critically evaluate the assumptions underlying García-Pérez and Alcalá-Quintana's 2AFC analysis. I highlight the problems associated with these assumptions and show how these problems cause them to misinterpret Lapid et al.'s results. This part also critically assesses the psychophysical reality of the difference model with guessing that they propose as an explanation of Lapid et al.'s results. The third part concludes with some additional remarks about García-Pérez and Alcalá-Quintana. BACKGROUND ON PSYCHOPHYSICAL TASKS AND PSYCHOMETRIC FUNCTIONS

show abstract

Effects of visual flicker on subjective time in a temporal bisection task

Cited by 62 publications

References 28 publications

Shortening of subjective tone intervals followed by repetitive tone stimuli

Shortening of subjective tone intervals followed by repetitive tone stimuli

The time–emotion paradox

DLs in reminder and 2AFC tasks: Data and models

Contact Info

Product

Resources

About