Shostrom (1966) developed the Personal Orientation Inventory (POI) to measure various aspects of self-actualization. A number of validity studies have been reported but only two reliability studies have appeared in the literature. This research reports a three-year study of personality correlates of student drug use at Lehigh University in which…

Staff members of the Psychology department at the University of Oregon rated each other's height on five rating scales representative of those found in social psychology. Average ratings proved to be very good estimates of height. (Author/JKS)

ANALYSIS, a FORTRAN computer program developed as an aid to investigation of and instruction in the psychometric properties of test items, is described. The program utilizes both correlational and analysis of variance approaches to classical item analysis. (Author/JKS)

Option weighting is an alternative to increasing test length as a means of improving the reliability of a test. The effects on test reliability of option weighting procedures were compared in two empirical studies using four independent sets of items. Biserial weights were found to be superior. (Author/CTM)

The reliabilities of two sociometric tests were compared when administered to three and four-year olds. The full-rank order instrument, the Paired-Comparisons Sociometric Test (PCST), was found to have greater test-retest reliability than the partial-rank order test, the Picture Sociometric Interview (PSI). (GDC)

An alternative formulation for Guttman scaling is presented. The new formulation is described, and advantages over Guttman's formulation are detailed. The method is assumption-free and capable of multidimensional analysis. (Author/JKS)

A computer simulation study was conducted to investigate Subkoviak's index of reliability for criterion-referenced tests, called the coefficient of agreement. Results indicate that the index can be adequately estimated. (JKS)

Four different methods for estimating the proportions of testees properly classified as having mastered or not mastered test content are examined, using data from the Scholastic Aptitude Test. All four methods prove reasonably accurate and all show some bias under certain conditions. (JKS)

Three personality measures were administered twice each with an interval of four weeks between administrations, and the response consistency of these tests was analyzed. The evidence is equivocal. The confounding of consistency effects with other sources of variance remains a problem. (Author/CTM)

A procedure is developed for estimating correlations among new tests when non-overlapping sub-samples each are administered a different new test and all sub-samples are administered a set of standard tests. (JKS)

Eight recent General Certificate of Education (GCE) examinations, containing mainly free-response questions, were investigated in terms of their marking reliability. The tests of 200 randomly selected candidates from each subject were re-marked by a senior GCE examiner, and these marks were compared with the marks awarded previously as a result of…

The reliabilities yielded by several differential option weighting scoring procedures were compared among themselves as well as against conventional testing. It was found that increases in reliability due to differential option weighting were a function of inter-item correlations. Suggestions for the implementation of differential option weighting…

A rederivation of Lord's formula for estimating variance in multiple matrix sampling is presented as well as the ways Cronbach's coefficient alpha and the Spearman-Brown prophecy formula are related in this context. (Author/JKS)

Test-retest reliability coefficients for the brief Career Ability Placement Survey and concurrent validity correlations against the Differential Aptitude Tests and the General Aptitude Test Battery are presented for samples of ninth and tenth grade students. (Author/JKS)

The results show that the stability of the Rotter Internal-External Locus of Control Scale is established over an eight month period. Concurrent validity of the Rotter Internal-External Locus of Control Scales in relation to the MacDonald-Tseng Locus of Control Scale is established. (Author/DEP)