A rigorous definition for a factor analysis model and a complete solution of the factor score indeterminacy problem are presented in this technical paper. The meaning and application of these results are discussed. (Author/JKS)

A simple roof is presented: that the squared multiple correlation of a variable with the remaining variables in the set of variables is a lower bound to the communality of that variable. (Author/JKS)

The use of interaction and non-linear terms in multiple regression poses problems for determining parsimonious models. Several computer programs for using these terms are discussed. (JKS)

A study conducted to examine the characteristics of the literature available to students in Nigeria focused on the references to periodical articles that were cited in selected social science theses and dissertations submitted to the University of Ibadan during 1965-70. Information recorded for each reference included place of publication, age,…

This article is a critique of a study which concluded that there is a relationship between the use of obstetrical drugs and the behavior of infants during the first month of life. (BRT)

This article is a reply to a critique of the authors' study which concluded that there is a relationship between the use of obstetrical drugs and the behavior of infants during the first month of life. (BRT)

This article demonstrates how to construct two types of graphs, the line plot, and the stem and leaf plot. States that these graphing techniques improve students' ability to understand tabular data. An instructional model is presented for directing lessons which use the two types of graphs. (JDH)

A study of the use of the OCLC interlibrary loan subsystem revealed that nearly two weeks elapse between the entry of a request into the subsystem and receipt of the item. Comparison with other studies shows little change since 1979. (Author/EM)

Study determines that solutions derived by multiple group analysis and item-total correlation analysis were generally most interpretable from a psychological perspective. It was concluded that their application to test construction is preferred over Procrustean or confirmatory maximum likelihood approaches. (RB)

Describes two new measures of consistency which refer to the extent to which more closely related scale types are found together in Holland's Self-Directed Search sort. One measure is based on the hexagonal model for use with three-point codes. The other is based on conditional probabilities for use with two-point codes. (Author/ABL)

Suggests that improving the data collected for a study will lead to the development of better models to analyze that data. Also urges researchers to have a more critical attitude toward the literal interpretation of test results. (RB)

Discusses five propositions that support a rationale for increased understanding and use of qualitative methods by performance technologists: there has been a paradigm shift across the social sciences, and qualitative methods make common sense, increase flexibility, lead to increased confidence in results, and are good for professional…

Tables on overall appropriations and how the states rank on seven scales (appropriations for 1985-1986 per capita, per $1000 of personal income, two-year change, 10-year change, two-year change less inflation, and 10-year change less inflation) are provided. (MLW)

The authors argue that a parameterization in terms of cell means is a useful conceptual device for resolving problems inherent in the nonorthogonal analysis of variance. They demonstrate their argument by considering two widely-used methods for testing main effects. (Author/BW)

The use of the terms "sensitivity, threshold, bias, and ratio scale" in psychophysics is discussed, with special reference to the statistical decision theory of sensory discrimination and its application to signal detection and classical psychophysical procedures. (Editor)