core area

the central part of a group’s home range that is used most extensively, often where the major locations of food or shelter are found. Home ranges of groups may overlap considerably, but it is rare to find overlap in core areas.

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Psychology term of the day

February 1st 2025

Spearman–Brown prophecy formula

the mathematical formulation of a basic tenet of classical test theory concerning the length (number of items) of a test and its influence on reliability, whereby increasing the number of items with similar content results in increased reliability for the test, and decreasing the number of items leads to decreased reliability. The formula allows a researcher to estimate the gains or losses in reliability that would occur with changes in test size. Also called Spearman–Brown prediction formula. [Charles Spearman; W. Brown, 20th-century British psychologist]