Interest development is not an easily studied process. There are at least 4 methods for examining the process of stability and change over time: relative stability, absolute stability, profile stability, and structural stability. A program of research that focuses on examining these 4 types of stability is summarized relative to the issues…

The S.I.T. is an age scale of intelligence with demonstrated reliability and high validity coefficients correlated to the Stanford-Binet. The items of the SIT were classified according to a scheme resembling Valett's classification of Stanford-Binet test items. A comparison of the classifications is made. (Author)

Extrapolated IQs for the Wechsler Intelligence Scale for Children-Revised (WISC-R) are presented for sums of scaled scores that are both below and above the values published in Wechsler's WISC-R manual. The regression equations on which these extrapolations are based and cautions regarding the clinical use of these IQs are also presented. (Author)

This paper presents theory concerning the relationships between reliability, misinformation and item discrimination coefficients. It is shown that, to the extent that misinformation rather than ignorance causes examinees to miss multiple-choice items, higher item discrimination coefficients and lower difficulty indices may be expected. Data were…

Presents two scales constructed to measure farmers' attitudinal changes toward improved agricultural practices and toward adult literacy as a result of their participation in the Farmers' Functional Literacy Programme in India. (MF)