difference score

(symbol: D) an index of dissimilarity or change between observations from the same individual across time, based on the measurement of a construct or attribute on two or more separate occasions. For example, it would be helpful to calculate a difference score for a person’s weight at the beginning of a diet and exercise program and the final weight 6 months later. Also called change score; gain score.

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Psychology term of the day

May 8th 2024

PI

1. abbreviation for prescribing information. See labeling.

2. abbreviation for proactive interference.

3. abbreviation for progressive interval. See progressive-interval schedule.