Find over 25,000 psychological definitions


geometric mean

a measure of central tendency calculated for k numbers x1…xk as (x1× x2 × x3…xk)1/k. A geometric mean is similar to an arithmetic mean except that the latter involves the sum of the quantities divided by the number of quantities, whereas the former is the product of the quantities with the product raised to the power of 1 divided by the number of quantities. Thus, for the numbers 1, 2, and 3, the arithmetic mean is 6/3 = 2, and the geometric mean is the cube root of (1)(2)(3) = 61/3 = 1.817. See also harmonic mean.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

July 27th 2024

script

script

n.

1. a cognitive schematic structure—a mental road map—containing the basic actions (and their temporal and causal relations) that comprise a complex action. Also called script schema.

2. a structured representation consisting of a sequence of conceptual dependencies grouped together to capture the semantic relationships implicit in everyday human situations. It was designed for the purpose of computer-based story understanding. [created in 1966 by U.S. cognitive and computer scientist Roger C. Schank (1946–  ) and U.S. psychologist Robert P. Abelson (1928–2005)]

3. see prescription drug.

4. see script analysis.