A REASSESSMENT OF STATISTICAL POWER ANALYSIS IN HUMAN COMMUNICATION RESEARCH

This study conducted a statistical power analysis of 64 articles appearing in the first four volumes of Human Communication Research, 1974–1978. Each article was examined, using Cohen's revised handbook, assuming nondirectional null hypotheses and an alpha level of .05. Statistical power, the probability of rejecting a false null hypothesis, was calculated for small, medium, and large experimental effect sizes and averaged by article and volume. Results indicated that the average probability of beta errors appears to have decreased over time, providing a greater chance of rejecting false null hypotheses, but this also raised several power-related issues relevant to communication research in general.     

EXPLICATION AND TEST OF A MODEL OF COMMUNICATIVE COMPETENCE

This research investigated the concept of communicative competence. A definition and a five-component model of communicative competence is proposed. Interaction management, empathy, affiliation/support, behavioral flexibility, and social relaxation are identified as components of competence, with interaction management playing a central role. In an experiment designed to partially test the model, 239 Ss were assigned to evaluate a confederate's role-played communicative competence in one of four interaction management treatment conditions. Results indicated a strong, positive, linear relationship between interaction management and communicative competence. Positive correlations between competence and other components of the model were observed. The competent communicator is thus described as empathic, affinitive and supportive, and relaxed while interacting; he is capable of adapting his behavior as the situation within an encounter changes and as he moves from encounter to encounter. The manner in which the interaction is managed contributes, in part at least, to his fellow interact ants' perceptions of his competence.     

Misunderstandings of figure and ground A note

Kennedy, J. M. Misunderstandings of figure and ground. A note. Scand. J. Psychol., 1973, 14, 207–209.MdashThe hypothesis that contours and lines shape only one of their adjoining regions is shown to be erroneously attributed to Rubin. Some well-known demonstrations supporting the hypothesis are shown to be confounded.