Interaction of task readiness and automatic retrieval in task switching: negative priming and competitor priming

Area of Science:

• Cognitive psychology
• Neuroscience
• Human performance

Background:

• Task switching performance is often impaired compared to task repetition.
• Residual task switch costs persist even with extended preparation time.
• Understanding the mechanisms behind these costs is crucial for cognitive models.

Purpose of the Study:

• To investigate the role of stimulus-cued retrieval of previous task episodes in residual task switch costs.
• To identify and differentiate the contributing factors to these costs, specifically competitor priming and negative priming.
• To examine how task readiness and stimulus set size modulate these interference effects.

Main Methods:

• Two experiments were conducted involving task switching paradigms.
• Participants performed tasks such as word reading and picture naming.
• Analysis focused on reaction times and error rates in switch versus repetition trials, considering stimulus set size and task dominance.

Main Results:

• Residual task switch costs are significantly influenced by the retrieval of previous task episodes.
• Competitor priming (facilitation of response to distractor stimuli from a previous task) and negative priming (impaired processing of suppressed responses) were identified as key factors.
• Negative priming was dependent on stimulus set size, suggesting it occurs when distractors are highly activated.
• Interference effects selectively impacted the dominant task (word reading) on switch trials, not the non-dominant task (picture naming).

Conclusions:

• Stimulus-cued retrieval of past task episodes plays a substantial role in residual task switch costs.
• The interplay between competitor priming and negative priming contributes to performance decrements after task switching.
• Task readiness and stimulus set size modulate the impact of these retrieval-based interference effects, highlighting their selective influence in high task competition scenarios.