chapter  3
3 Pages

Internal Consistency and Test-Retest Reliability Occupational Aptitude Survey and Interest Schedule

Alpha reliability provides an index of inter-item consistency, that is, item homogeneity or unidimensionality. A test composed of items that measure the same unitary construct would be expected to have a high degree of alpha reliability .... Alpha reliability is based on one administration of a test (Anastasi, 1988) .