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Larger stimuli require longer processing time for perception

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Version 2 2023-06-12, 08:39
Version 1 2023-06-09, 05:29
journal contribution
posted on 2023-06-12, 08:39 authored by Ryota Kanai, Edwin S Dalmaijer, Maxine ShermanMaxine Sherman, Genji Kawakita, Chris L E Paffen
The time it takes for a stimulus to reach awareness is often assessed by measuring reaction times (RTs) or by a temporal order judgement (TOJ) task in which perceived timing is compared against a reference stimulus. Dissociations of RT and TOJ have been reported earlier in which increases in stimulus intensity such as luminance intensity results in a decrease of RT, whereas perceived perceptual latency in a TOJ task is affected to a lesser degree. Here, we report that a simple manipulation of stimulus size has stronger effects on perceptual latency measured by TOJ than on motor latency measured by RT tasks. When participants were asked to respond to the appearance of a simple stimulus such as a luminance blob, the perceptual latency measured against a standard reference stimulus was up to 40?ms longer for a larger stimulus. In other words, the smaller stimulus was perceived to occur earlier than the larger one. RT on the other hand was hardly affected by size. The TOJ results were further replicated in a simultaneity judgement task, suggesting that the effects of size are not due to TOJ-specific response biases but more likely reflect an effect on perceived timing.

History

Publication status

  • Published

File Version

  • Published version

Journal

Perception

ISSN

0301-0066

Publisher

SAGE Publications

Issue

5

Volume

46

Page range

605-623

Department affiliated with

  • Psychology Publications

Research groups affiliated with

  • Sackler Centre for Consciousness Science Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-03-16

First Open Access (FOA) Date

2017-03-20

First Compliant Deposit (FCD) Date

2017-03-20

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