internal consistency of a test . The KR20 or KR20 method is equivalent to the average split-half correlation obtained from all possible splits of the items. For the KR20 formula to be applied, all items must be scored either 0 or 1.
reliability that corrects for the fact that individual scores are based on only half of the total test items; a statistic used to determine internal reliability of tests that use items with dichotomous answers (yes/no, true/ false). Kuder-Richardson formula 20 is also known as Kuder-Richardson 20 , KR20 or KR20 method . Please see also Kuder-Richardson 20
behavior in terms of the totality of influences acting on people rather than in terms of the manifestation of inner essences. Lewin was mainly responsible for applying Gestalt principles to the topics of motivation and group dynamics.