The work of Joreskog and Sorbom in comparing factor structures of several populations is extended to a more general analysis of covariance structures. Also, more complex constraints on parameters are allowed in this work. (JKS)

Discusses the use of hypothesis testing research and hypothesis generating research designs. Researchers investigating teacher development should continue to use hypothesis generating research designs to depict, relate, and conceptualize information in this area. Hypothesis testing research designs could check the accuracy of these initial…

Two linearly constrained models based on the Rasch model are discussed. Necessary and sufficient conditions for the existence of unique conditional maximum likelihood estimators are derived. Methods for hypothesis testing within this framework are proposed. (Author/JKS)

Either Bartlett's chi-square test of sphericity or Steiger's chi-square test can be used to test the significance of a correlation matrix to determine the appropriateness of factor analysis. They were evaluated using computer-generated correlation matrices. Steiger's test is recommended due to its increased power and computational simplicity.…

Second in a three-part series, this article provides suggestions for the development of theoretical models in which issues and questions in economic education can be conceptualized and formally stated as empirically testable hypotheses. (Author/RM)

According to the stage-learning hypothesis, children's ability to learn is constrained by their pretraining stages of cognitive development. Some procedures for obtaining unconfounded tests of this hypothesis are developed in this paper, and some applications to factorial experiments are considered. (Author/BW)

Recent findings suggest individuals seek evidence to confirm initial hypotheses about other people, and that seeking confirmatory evidence makes it likely that a hypothesis will be confirmed. Examined the generalizability of these findings to the employment interview. Consistent use of confirmatory hypothesis testing strategies was not found.…

A novel solution to the statistical problems in an evaluation of rare events is described. The significance of variations in the number of child homicides is analyzed in a binary time series of "active" months for monitoring future incidence and related systemic events. (Author/CM)

This paper relates common statistics from contingency table analysis to the more familiar R squared terminology in order to better understand the strength of the relation implied. The method of coding contingency tables was shown, as well as how R squared related to phi, V, and chi squared. (Author/CTM)

Examined effects of cognitive focusing training in early and late concrete operational children. Focusing was manifested by the late concrete operational children regardless of whether or not they had been trained. The amount of negative feedback and the nature of the probe techniques affected the manifestation of focusing. (Author/DB)

Describes a process model for sentence verification, including sentences expressing the implications of their antecedents. The model's distinctive features are the assumption that verification is based upon a focal element in the test sentence, and the comparison of this element with information corresponding to it in the antecedent…

States that recall of items given spaced repetitions is generally superior to recall of items given immediate repetitions. Reports on a test of Jacobi's hypothesis that this spacing effect is explained by the distinction between problem solving and remembering. Suggests that the effect cannot be explained solely by this distinction. (Author/MES)

Counterplans have become commonplace in intercollegiate debate, yet misconceptions abound. This article attempts to integrate thinking about counterplans with general debate theory. It reexamines the issue of topicality and sketches the basis for comparison of affirmative proposals with negative counterplans in the areas of presumption, inherency,…

Addresses both the issues raised by the recent trial in Sacramento (California), "Scopes II," which pitted evolution against scientific creationism, and the questions that stem from the trial's failure to address those issues. (Author/WD)

Monte Carlo techniques were employed to compare the familiar F-test with Welch's V-test procedure for testing hypotheses concerning a priori contrasts among K treatments. The two procedures were compared under homogeneous and heterogeneous variance conditions. (Author)