Different confidence-accuracy relationships for feature-based and familiarity-based memories

Area of Science:

• Cognitive Psychology
• Human Memory Research
• Perceptual Science

Background:

• Understanding the relationship between subjective confidence and objective accuracy in memory recall is crucial for cognitive science.
• Distinguishing between feature-based and familiarity-based memory retrieval provides insight into different memory processes.

Purpose of the Study:

• To investigate the interplay between memory accuracy, confidence, and retrieval basis (feature vs. familiarity).
• To determine if confidence reliably predicts accuracy across different memory retrieval strategies.

Main Methods:

• Participants viewed naturalistic pictures for brief durations, followed by a recognition test (old/new).
• Confidence ratings and the basis of memory (feature vs. familiarity) were recorded.
• Two experiments manipulated feature/familiarity as a dependent and independent variable.

Main Results:

• Feature-based memory responses were initially more accurate than familiarity-based ones.
• Both confidence and accuracy increased with presentation duration for both response types.
• When controlling for confidence, familiarity-based responses showed higher accuracy than feature-based responses.

Conclusions:

• Confidence and accuracy may stem from different underlying information sources in memory.
• Phenomenal basis of memory reports (feature vs. familiarity) impacts the reliability of confidence as an accuracy indicator.
• Applied implication: Differences in confidence should not automatically be equated with differences in accuracy when retrieval bases vary.