Separating bias and sensitivity in judgments of associative memory

Area of Science:

• Cognitive Psychology
• Psycholinguistics
• Memory Research

Background:

• Human associative memory research investigates how people perceive connections between words.
• The Judgments of Associative Memory (JAM) function describes the relationship between perceived word association and objective measures.
• Existing JAM functions exhibit a high intercept and shallow slope, indicating a potential bias in subjective ratings.

Purpose of the Study:

• To investigate methods for reducing the intercept and increasing the slope of the JAM function.
• To determine if the intercept and slope components of the JAM function can be independently manipulated.
• To differentiate between bias and sensitivity components within associative memory judgments.

Main Methods:

• Two experiments were conducted involving word association tasks.
• Experiment 1 utilized discrimination training on word pairs.
• Experiment 2 constrained subjective word association ratings to sum to a constant.

Main Results:

• Both discrimination training and rating constraints significantly reduced the intercept of the JAM function.
• Neither experimental manipulation affected the slope of the JAM function.
• The results suggest that the intercept reflects a manipulable bias, while the slope reflects associative sensitivity.

Conclusions:

• The intercept of the JAM function appears to represent a bias component that can be independently adjusted.
• The slope of the JAM function, reflecting sensitivity to associative strength, remains resistant to the tested manipulations.
• Understanding these independent components offers new insights into the mechanisms of human associative memory.