Incidental covariation learning leading to strategy change

Area of Science:

• Cognitive Psychology
• Human-Computer Interaction
• Neuroscience

Background:

• Instructions typically guide stimulus feature selection for task responses.
• The impact of practice with alternative, correlating stimulus features on strategy remains unclear.
• Understanding learned strategies versus instructed ones is crucial for task design.

Purpose of the Study:

• To investigate if practice with a correlating stimulus feature can alter instructed response strategies.
• To determine how an unmentioned, covarying stimulus feature influences task performance over time.
• To explore the conditions under which spontaneous strategy changes occur.

Main Methods:

• Participants were instructed to use stimulus position for response selection.
• An unmentioned stimulus feature (color) covaried with position during practice.
• Ambiguous trials assessed the influence of the covarying color feature on response selection.

Main Results:

• Some participants exclusively used the instructed feature, while others shifted to the covarying color feature.
• Responses were biased by the uninstructed color feature, even when it conflicted with the instructed feature.
• The influence of the color feature generalized across different stimulus combinations.

Conclusions:

• Incidental covariation learning can lead to spontaneous, voluntary strategy changes.
• Strategy shifts involve re-configuring instructed task sets and are accompanied by awareness.
• This highlights the brain's ability to adapt and learn alternative response strategies.