Control of stimulus-response translation in dual-task performance

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Factors

Background:

• Dual-task control models often propose a bottleneck in stimulus-response (S-R) translation.
• Previous research suggests stimulus processing is influenced by later task responses, indicating parallel S-R translation.

Purpose of the Study:

• To investigate whether the backward-compatibility effect in S-R translation is affected by working-memory load.
• To determine if S-R translation remains automatic and capacity-independent under dual-task conditions.

Main Methods:

• Four experiments were conducted to examine backward-compatibility effects.
• Working-memory load was manipulated by adding a memory task or increasing S-R alternatives.
• The influence of task continuation and prior S-R mapping consistency was assessed.

Main Results:

• Backward-compatibility effects were independent of working-memory load (Experiments 1 & 2).
• These effects persisted even when the secondary task was no longer performed (Experiment 3).
• Inconsistent prior S-R mappings significantly impacted backward effects (Experiment 4).

Conclusions:

• Stimulus-response translation can be capacity-independent and automatic, even in dual-task scenarios.
• Direct S-R associations appear to mediate these effects, forming rapidly with practice.