Judgments of the duration of visually marked empty time intervals: Linking perceived duration and sensitivity

Grondin, Simon

doi:10.3758/bf03206040

Cited by 27 publications

(34 citation statements)

References 47 publications

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“…The psychometric function is again given by Equation (5), except that S mp is a free parameter that captures the arbitrary criterion used by observers. In yet a further variant, observers receive feedback relative to the objective midpoint of the range of test durations (Grondin, 1998), which should help them to set a stable criterion.…”

Section: Frontiers In Humanmentioning

confidence: 99%

The Role of Parametric Assumptions in Adaptive Bayesian Estimation.

Alcalá-Quintana

Garcı́a-Pérez

2004

Psychological Methods

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Time perception is studied with subjective or semi-objective psychophysical methods. With subjective methods, observers provide quantitative estimates of duration and data depict the psychophysical function relating subjective duration to objective duration. With semi-objective methods, observers provide categorical or comparative judgments of duration and data depict the psychometric function relating the probability of a certain judgment to objective duration. Both approaches are used to study whether subjective and objective time run at the same pace or whether time flies or slows down under certain conditions. We analyze theoretical aspects affecting the interpretation of data gathered with the most widely used semi-objective methods, including single-presentation and paired-comparison methods. For this purpose, a formal model of psychophysical performance is used in which subjective duration is represented via a psychophysical function and the scalar property. This provides the timing component of the model, which is invariant across methods. A decisional component that varies across methods reflects how observers use subjective durations to make judgments and give the responses requested under each method. Application of the model shows that psychometric functions in single-presentation methods are uninterpretable because the various influences on observed performance are inextricably confounded in the data. In contrast, data gathered with paired-comparison methods permit separating out those influences. Prevalent approaches to fitting psychometric functions to data are also discussed and shown to be inconsistent with widely accepted principles of time perception, implicitly assuming instead that subjective time equals objective time and that observed differences across conditions do not reflect differences in perceived duration but criterion shifts. These analyses prompt evidence-based recommendations for best methodological practice in studies on time perception.

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Section: Frontiers In Humanmentioning

confidence: 99%

The Role of Parametric Assumptions in Adaptive Bayesian Estimation.

Alcalá-Quintana

Garcı́a-Pérez

2004

Psychological Methods

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“…This is not compatible with the left-hemisphere hypothesis for temporal processing, but it does comply with the hypothesis of an internal mechanism that scans visual information in a left-right order (64) . In Grondin (61) , it was also shown that discrimination is better with unilateral sequences than with bilateral ones.…”

Section: The Horizontal Case: Laterality Effect?mentioning

confidence: 99%

“…In other words, the overall level of temporal performance is not independent of the quality of a sensory impression (fovea vs. periphery). Indeed, overall discrimination is better for 250-ms empty intervals when both visual markers are presented at fovea than it is in the periphery conditions (61) . Future research on lateral effects in visual temporal processing should focus on rhythmic effects, i.e.…”

Section: Author's Notementioning

confidence: 99%

“…The few data available on this issue suggest no cerebral difference in the performance of this task when visual markers are used (61) , and even some neuropsychological evidence of a superiority of the right hemisphere for auditory temporal discrimination (62)(63) . In Grondin (61) , two visual signals (left or right) established four marker-type empty intervals, two of which were presented unilaterally (left-left or right-right) and the other two, bilaterally (left-right or right-left). It was shown that perceived duration is longer with a left-right sequence than with a rightleft sequence.…”

Section: The Horizontal Case: Laterality Effect?mentioning

confidence: 99%

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Processing time between visual events

Grondin¹

2003

Arq. Bras. Oftalmol.

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“…1A and B). This interpretation assumes that participants employed the same response criterion for all conditions and that the differences in the distributions of Blong^and Bshortr esponses depend only on the perceived duration in each condition (Grondin, 1998(Grondin, , 2008. Measuring temporal sensitivity (or level of duration discrimination), the other dependent variable in the present study, entailed estimating of the standard deviation of the psychometric function (Fig.…”

Section: Data Analysesmentioning

confidence: 99%

Foreperiod and range effects on time interval categorization

Laflamme

Zakay²,

Gamache

et al. 2015

Atten Percept Psychophys

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One factor influencing the perceived duration of a brief interval is the length of the period preceding it, namely the foreperiod (FP). When multiple FPs are varied randomly within a testing session, longer FPs result in longer perceived duration. The purpose of this study was to identify what characteristics modulate this effect. In a task where participants were asked to categorize the duration of target intervals with respect to a 100-ms standard, the FPs were distributed over a 150-, 300-, or 900-ms range with the midpoint (1000 ms) of these distributions being kept constant. The results indicate that the effect of the length of variable FPs on perceived duration was much stronger in the 900-ms range condition. More specifically, this effect is due to the differences between the shortest FPs. The results also reveal that, overall, there are more short responses in the 300-ms condition than in the other range conditions. Moreover, the data reveal that the narrower the distribution, the better the discrimination. One interpretation of the main result (range effect) is that a wider distribution leads to an increased prior uncertainty towards the foreperiod length.

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Judgments of the duration of visually marked empty time intervals: Linking perceived duration and sensitivity

Cited by 27 publications

References 47 publications

The Role of Parametric Assumptions in Adaptive Bayesian Estimation.

The Role of Parametric Assumptions in Adaptive Bayesian Estimation.

Processing time between visual events

Foreperiod and range effects on time interval categorization

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