Procedural and declarative knowledge simultaneously contribute to category response selection

Area of Science:

• Cognitive Psychology
• Neuroscience
• Learning Sciences

Background:

• Skilled behavior integrates declarative (explicit knowledge) and procedural (implicit knowledge) learning.
• The precise interaction mechanisms between these memory systems remain unclear.
• Prior research suggests system-level competition, but interaction at the representational level is unknown.

Purpose of the Study:

• To investigate if declarative and procedural knowledge can simultaneously contribute to categorization response selection.
• To determine if distinct memory systems interact at the representational level during behavior.

Main Methods:

• Participants categorized stimuli using a verbalizable shape rule (declarative).
• Stimuli also had probabilistic color differences (procedural), unbeknownst to participants.
• Response times were measured during conflicting and congruent rule applications.

Main Results:

• Participants utilized both shape (declarative) and color (procedural) information for categorization.
• Responses were faster when both cues aligned and slower when they conflicted.
• Most participants remained unaware of the procedural color learning.

Conclusions:

• Declarative and procedural memory systems contribute simultaneously to behavior at the trial level.
• This demonstrates a novel interaction between memory systems at the representational level.
• Findings have implications for understanding decision-making and educational strategies.