quantile

n. a value in a series of values in ascending order below which a given percentage of values lies; for example, a 50% quantile (also called a median) is the point at which 50% of the values fall below that value (and 50% above). Other types of quantile are quartiles, dividing the series into four equal-sized groups; deciles, dividing it into 10 groups; and percentiles (or centiles), dividing it into 100 groups. Also called fractile.

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Psychology term of the day

December 26th 2024

developmental systems approach

the view that development is the result of bidirectional interaction between all levels of biological and experiential variables, from the genetic through the cultural. Also called developmental contextual model. See also bidirectionality of structure and function; transactional model of development.