XYY syndrome

a chromosomal anomaly discovered in 1961 and initially believed to predispose males to aggression and violence. The theory was modified when XYY anomalies were found among normal males. Also called double-Y condition.

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Psychology term of the day

February 28th 2025

hypnotic regression

a therapeutic technique in which an individual under hypnosis is induced to relive a previous experience that may be contributing to current emotional difficulties. There are two types of hypnotic regression: age regression and past-life regression.