"Remember" source memory ROCs indicate recollection is a continuous process.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Memory Research

Background:

• The dual process model differentiates memory retrieval into recollection (detailed retrieval) and familiarity (general retrieval).
• A key debate in memory research concerns whether recollection operates as a discrete threshold process or a continuous one, similar to familiarity.

Purpose of the Study:

• To investigate whether recollection is a continuous or threshold process using receiver operating characteristic (ROC) analysis.
• To compare the explanatory power of continuous and threshold models of recollection.

Main Methods:

• Three experiments involved object presentation and subsequent memory tests with "remember-know" or confidence ratings.
• Source memory confidence ratings were used to generate recollection-based ROC curves.
• Continuous signal detection unequal variance and threshold dual process models were evaluated against empirical data.

Main Results:

• Threshold models failed to adequately fit the recollection-based ROCs across all experiments.
• Continuous models provided an adequate fit for all tested recollection-based ROCs.
• The findings suggest recollection is not a threshold process.

Conclusions:

• Both recollection and familiarity are continuous memory processes.
• Continuous models better explain the nature of recollection than threshold models.
• This research contributes to understanding the fundamental mechanisms of human memory.