Dual route for subtask order control: Evidence from the psychological refractory paradigm

Roy Luria*, Nachshon Meiran

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A change in subtask order in the psychological refractory period (PRP) paradigm increases the effect of stimulus onset asynchrony (SOA) on the second response. We used a paradigm with cued, randomly determined subtask order to test the hypothesis that this SOA by order switch overadditivity reflects order control, via "copying" stimulus order. In Experiments 1a and 1b, overadditivity was evident only with insufficient opportunity for cue-based order control. In Experiment 2, overadditivity was decreased by using the same set of stimuli in the two subtasks, presumably by removing the opportunity to rely on stimulus order. In Experiment 3, removing the order cue increased the overadditivity, presumably because control was based solely upon copying stimulus order. The results indicate interactive top-down and bottom-up order control. Implications to theories of the PRP paradigm are discussed.

Original languageEnglish
Pages (from-to)720-744
Number of pages25
JournalQuarterly Journal of Experimental Psychology
Volume59
Issue number4
DOIs
StatePublished - Apr 2006
Externally publishedYes

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