sample variance

(symbol: s²) the dispersion of scores within a group selected for study, as opposed to the population variance. It is calculated by determining each score’s difference from the average for the set, squaring and summing these differences, and then dividing by the total number of scores minus one.

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Psychology term of the day

November 27th 2024

weight regulation

a process, governed by a complex array of neural mechanisms and structures (including the hypothalamus), in which the brain seeks an optimum balance between an organism’s food intake and energy expenditure after a certain body weight is achieved. A number of other factors, such as environmental stimuli, may influence the process as well.