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Revised and Neuroimaging-Compatible Versions of the Dual Task Screen

Revised and Neuroimaging-Compatible Versions of the Dual Task Screen

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Hierarchical task organization in dual tasks: evidence for higher level task representations.

Patricia Hirsch¹, Sophie Nolden², Andrea M Philipp²

¹Department of Cognitive and Experimental Psychology, Institute of Psychology, RWTH Aachen University, Jägerstr. 17-19, 52066, Aachen, Germany. patricia.hirsch@psych.rwth-aachen.de.

Psychological Research

|March 13, 2017

Summary

This study investigated task representations in dual-task situations using the psychological refractory period (PRP) paradigm. Findings suggest that hierarchical task representations are activated during dual-task processing, impacting performance.

Keywords:

Dual tasks processing Hierarchical higher level tasks Psychological refractory period Task-pairs

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Area of Science:

Cognitive Psychology
Neuroscience
Human Factors

Background:

Understanding how the brain manages multiple tasks simultaneously is crucial for cognitive science.
Previous research on dual-tasking has explored interference and resource allocation.
The role of hierarchical task representations in dual-task performance remains an active area of investigation.

Purpose of the Study:

To determine if hierarchical, higher-level task representations are activated within each trial during dual-task situations.
To differentiate between task-pair switch costs arising from persisting task activation versus repetition-priming effects.

Main Methods:

Combined the psychological refractory period (PRP) paradigm with a task-pair switching logic.
Conducted two experiments manipulating task-pair structures (varying T1/constant T2 and constant T1/varying T2).
Analyzed performance metrics including reaction time, accuracy, and switch costs under varying stimulus onset asynchronies (SOA).

Main Results:

Experiment 1 demonstrated a PRP effect and task-pair switch costs in both Task 1 (T1) and Task 2 (T2).
Experiment 1 results could not rule out repetition-priming as the cause of switch costs.
Experiment 2, using a modified logic, replicated task-pair switch costs and ruled out repetition-priming, while also disentangling task-pair switching from T1 switching effects.

Conclusions:

The findings strongly support the hypothesis that hierarchical higher-level task representations are activated during dual-task processing.
Task-pair switch costs are indicative of the dynamic activation and deactivation of these higher-level task representations.
This research provides evidence for the flexible and adaptive nature of cognitive control in managing multiple tasks.