title: Response selection difficulty and asymmetrical costs of switching between tasks and stimuli: no evidence for an exogenous component of task-set reconfiguration.
abstract: Four task-switching experiments examined the notion of an exogenous component of task-set reconfiguration (i.e., a process needed to shift task set that is not initiated in the absence of a task-associated figuration stimulus). The authors varied the complexity and familiarity of stimulus-response (SR) mapping rules to produce differentially time-consuming reconfiguration demands. Tasks with more complex or less familiar rules did not display increased switch costs, given that stimulus repetitions were excluded from the analysis. These results do not support the idea of exogenous reconfiguration. Moreover, stimulus repetitions inflated task-switch costs and did so disproportionately for tasks with increased response selection difficulty, thereby demonstrating that insufficient control of the sequence of stimuli may yield results that mimic those predicted by exogenous reconfiguration accounts.
authors.affiliation: Helmut-Schmidt-Universität/Universität der Bundeswehr Hamburg, Hamburg, Germany. mhuebner@unibw-hamburg.de
authors.forename: Mike
authors.initials: M
authors.lastname: Hübner
authors.forename: Rainer H
authors.initials: RH
authors.lastname: Kluwe
authors.forename: Aquiles
authors.initials: A
authors.lastname: Luna-Rodriguez
authors.forename: Alexandra
authors.initials: A
authors.lastname: Peters
mesh_terms: D000328:Adult; D001288:Attention; D003071:Cognition; D005106:Exploratory Behavior; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011930:Reaction Time