Event timing in human vision: Modulating factors and independent functions

Abstract

Essential for successful interaction with the environment is the human capacity to resolve events in time. Typical event timing paradigms are judgements of simultaneity (SJ) and of temporal order (TOJ). It remains unclear whether SJ and TOJ are based on the same underlying mechanism and whether there are fixed thresholds for resolution. The current study employed four visual event timing task versions: horizontal and vertical SJ and TOJ. Binary responses were analysed using multilevel binary regression modelling. Modulatory effects of potential explanatory variables on event timing perception were investigated: (1) Individual factors (sex and age), (2) temporal factors (SOA, trial number, order of experiment, order of stimuli orientation, time of day) and (3) spatial factors (left or right stimulus first, top or bottom stimulus first, horizontal vs. vertical orientation). The current study directly compares for the first time, performance on SJ and TOJ tasks using the same paradigm and presents evidence that a variety of factors and their interactions selectively modulate event timing functions in humans, explaining the variance found in previous studies. We conclude that SJ and TOJ are partially independent functions, because they are modulated differently by individual and contextual variables.

Empirical validation of QUEST+ in PSE and JND estimations in visual discrimination tasks

“…This might have first confused participants in their responses, but at the same time, left some room for performance improvement. In our Experiment 3, contrary to a comparable study by Arstila et al (2020), who found no learning due to a ceiling effect, we observed the disappearance of response bias across blocks of trials. The learning could be due to decreased thresholds for apparent motion.…”

Forcing techniques & Neuroscience

“…There is extensive literature regarding how visual and auditory information are integrated ( Colonius & Diederich, 2010 ;Kuling et al, 2013 ;Linares & Holcombe, 2014 ;Arstila et al, 2020 ). Desynchronization studies have been used to inspect when the relation is lost.…”