Current task activation predicts general effects of advance preparation in task switching

Area of Science:

• Cognitive Psychology
• Human Performance

Background:

• Task switching research explores cognitive control and executive functions.
• Preparation intervals (PI) are crucial for understanding how advance information influences task execution.

Purpose of the Study:

• To investigate the influence of preparation on general task performance in reaction-time matching tasks.
• To compare the effects of within-subjects versus between-subjects preparation interval manipulations.

Main Methods:

• Two experiments measured response times (RTs) and error rates in color- and shape-matching tasks.
• Task blocks involved repetition or switching, with manipulated preparation intervals (PI).
• PI was manipulated within-subjects in Experiment 1 and between-subjects in Experiment 2.

Main Results:

• Comparable task performance was observed after long PIs in both within- and between-subjects designs.
• Short PIs led to significantly improved performance in the between-subjects design.
• Preparation effects were analogous for both task switching and task repetitions.
• Consistent switch costs and within-run slowing effects were noted.

Conclusions:

• Advance preparation effects extend beyond initial trials in task switching.
• Findings support and refine the activation approach to task switching.
• The design of preparation intervals (within- vs. between-subjects) critically influences task performance outcomes.