Two studies were reported which attempted to estimate the stability and construct validity of human salivary response as a measure of individual differences (IDs) in physiological arousal. Twenty-second base line estimates and 20-second response levels to four drops of lemon juice were measured, with the former value being removed from the latter…

The efficiency of mastery tests of fixed length which sorts students into two categories is analyzed. For the sort of the students, an index, suggested by Fisher's linear discriminant function for two groups, is provided. (DB)

This study assessed the extent to which students commit various types of errors when completing Holland's Self-Directed Search (SDS) entirely on their own. Nearly all students made some type of error and approximately half of the students made errors that affected their final 3-letter summary codes. Almost one-fifth of the students made errors…

A brief and simple guide discusses the place and purpose of coding experimental data in the research process. The trade-offs involved unitizing data are reviewed; it is noted that a decision that increases reliability may reduce the validity of results, but without reliability there will be no validity at all. A discussion of categorizing data…

It has been the impression of the authors that a significant minority of MMPI profiles produced by adolescents suggest schizophrenia when such a process is not evident clinically. The present study was conducted in order to measure and better understand the frequency of false positive adolescent MMPI profiles. (Author)

Data are presented on the retest and split-half reliability of the Rosenzweig Picture-Frustration (P-F) Study, Children's Form, for two groups of subjects (aged 10-11 and 12-13), each group tested twice at an interval of three months. Reliability by retest was consistently higher than by the split-half method. (Author/CTM)

The reliability of the proposed short form of the Revised Illinois Test of Psycholinguistic Abilities (ITPA) was computed on data derived from six-year-old ITPA standardization test booklets (128 Ss). (Author/CL)

It is shown that if a behavior domain can be described by the common factor model with a finite number of factors, the squared correlation between the sum of a selection of items and the domain total score is actually greater than coefficient alpha. (Author/JKS)

An index for the dependability of mastery tests is described. Assumptions necessary for the index and the mathematical development of the index are provided. (Author/JKS)

Finding and interpreting lower bounds for reliability coefficients for tests with non-homogeneous items has been a problem for psychometricians. A computer search procedure is developed for locating such a lower bound in a variety of settings. (Author/JKS)

This paper is written to propose and describe a set of four criteria for the empirical evaluation of psychiatric classification. (Author)

The author argues that general intelligence assessment should be abandoned on moral and theoretical grounds, but that the conceptualization, testing, and identification of specific intellectual abilities is both defensible and worthwhile. (MB)

Suggests that A-Trait may have a direct influence on achievement in addition to influencing it through A-State. Results confirmed expectations that A-Trait is relatively stable over time and that A-State is less stable. (Author/DEP)

Describes the biomotometer and reports a reliability and a validity study of the instrument. (SB)