An application of a discriminant analysis, based on the weighted H-index—a reanalysis

Abstract.— A discriminant-analysis method for dichotomized data, based on the weighted H -index as the similarity measure between two persons, is introduced. The weight assigned each item is a strictly increasing function of the absolute value of its D -estimate. Here, only power functions are used. The method which is called the WHIDD-analysis, is applied to some clinical data (Jonsson, 1975). The power of 3 produces a correct classification of all 32 persons in the validation group.     

Bandura's theory of self-efficacy: A set of common sense theorems

Bandura's (1977) theory of self-efficacy is translated into non-technical language and is shown to consist of logically necessary rather than empirically testable statements. As an alternative to the dominant empiricist view, it is argued that valid theories in psychology are explications of conceptual relationship imbedded in ordinary language (common sense). This conceptual network is anterior to both observation and theorizing. The analogy between the tasks of pre-Euclidean geometry and contemporary psychology is explored. The tasks are seen as involving explication of our implicit concepts of respectively space and people. One consequence of the stated view is that much psychological research is pointless since it attempts to verify logically necessary statements by empirical methods.     

Length of the postfeedback interval and learning of probabilistic inference tasks

Learning of negative linear and J-shaped cue-criterion relations in single-cue learning tasks was studied in an experiment which varied the length of the postfeedback interval. Contrary to the predictions from a hypothesis construction model assuming that subjects construct hypotheses from the data provided by the task, there was no effect of the postfeedback interval. The results were interpreted to mean that the subjects' constructions are based on elements stored in memory, rather than on data from the task.