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Timing and reaction time.

M Grosjean¹, D A Rosenbaum, C Elsinger

¹Department of Psychology, Pennsylvania State University, University Park, Pennsylvania 16802, USA. mcg138@psu.edu

Journal of Experimental Psychology. General

|June 21, 2001

Summary

Participants in reaction time (RT) tasks may use internal timing strategies. Adjusting stimulus timing influenced RT and accuracy, supporting a model where internal timekeepers aid decision-making.

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Area of Science:

Cognitive Psychology
Neuroscience
Human Factors

Background:

Repetitive and temporally regular reaction time (RT) tasks may encourage participants to employ timing strategies.
These strategies can potentially influence response speed and accuracy, impacting experimental outcomes.

Purpose of the Study:

To investigate whether participants utilize timing strategies in serial choice RT tasks.
To examine how temporal regularity and deviations from it affect RT and error rates.

Main Methods:

Conducted three serial choice RT experiments.
Manipulated stimulus onset timing, presenting stimuli earlier or later than expected.

Main Results:

When stimuli arrived earlier than normal, RTs increased and errors decreased.
When stimuli arrived later than normal, RTs decreased and errors increased.
Observed results align with an elaborated diffusion model incorporating an internal timekeeper hypothesis.

Conclusions:

Participants appear to use timing strategies, initiating stimulus sampling based on an internal timekeeper.
This internal timing mechanism is employed in service of decision-making processes.
The findings support a more comprehensive model of RT performance that includes temporal prediction.

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