The educational psychologist in England and Wales

This article reviews the background to the development of the profession in England and Wales. It traces the recent pressures for expanding the size of the profession which led to the establishement of a working party by the British Government's Department of Education and Science, under the chairmanship of Professor Summerfield. The recent report of this working party (Department of Education and Science, 1968) is discussed and its analysis of the functions of the educational psychologist is summarized. The article selects a few of the report's main recommendations for the future. Those recommendations relating to training, numbers of educational psychologists required, the nature of the work, and the structure of the profession are outlined. Finally the article discusses initial reactions to the recommendations of the report.     

Two-voice music programming system: The PDP-9 as an automatic electronic organ

A small computer was programmed to translate two-part musical scores into tables of numbers which were then used in the execution of the music through an amplifier and loudspeaker. The objective was to create sets of tape recordings to be used in psychophysical testing of the discriminabilities and preferabilities of music played on different pitch scales. The close tolerances in the timing of events in such stimulus materials demand special programming techniques and hardware components. The working system is described, and recommendations are made concerning the main features of an improved system.     

Effects of viewing real versus fantasy violence upon interpersonal aggression

Of 96 male undergraduates, one-third saw a violent film which they were told represented a real event, one-third saw the same film presented as a fictional event, and the remaining subjects saw no film. One-half of the subjects in each group had been attacked previously by a confederate while the others had not. Each subject was then given an opportunity to aggress against the confederate by administering shocks to him as punishment in a learning task. Results indicate that subjects who observed real violence delivered stronger shocks to the confederate than subjects who viewed fantasy violence or saw no film. Subjects who were angered and saw the real film were the most punitive toward the confederate.     

AN EXPERIMENTAL ANALYSIS OF SOCIAL INTERACTION BETWEEN A BEHAVIORALLY DISORDERED PRESCHOOL CHILD AND HER CLASSROOM PEERS1

The social interaction between a behaviorally disordered preschool child and her classroom peers was measured under two conditions of contingent adult attention: (1) verbal praise and physical contact directed to the target subject's peers for appropriate interaction with the target subject, and (2) verbal praise and physical contact directed specifically to the target subject for engaging in appropriate interaction with peers. Continuous measures of interactive behavior were made during baseline, intervention, and return to baseline conditions. Results indicated that application of experimental contingencies to peers (Condition 1) rapidly increased appropriate social behaviors by the peers and also by the target subject. When experimental contingencies were applied to the target subject (Condition 2), a similar increase in appropriate social behaviors was noted for both the target subject and the peers. Additionally, during Conditions 1 and 2 the recipient(s) of contingent adult attention initiated more appropriate social contacts than did the interacting partner(s).     

Does backward masking by visual noise stop stimulus processing?

The identification of one, two, and four random letters was studied under three procedures: (1) backward masking by a visual noise; (2) concurrent masking by a visual noise; and (3) no masking. With backward masking the number of letters correctly identified was independent of the number presented. Direct judgments of the duration, brightness, contrast, sharpness, and texture of the letters were also made. Under backward masking the letters appeared to be on for a very brief duration, but with high apparent contrast. The results indicate that backward masking impairs identification by interrupting the stimulus processing, not by degrading the stimulus input.     

A case study of expert judgment: Economists' probabilities versus base-rate model forecasts

In this case study of economists' forecasts concerning economic downturn, we examine key issues concerning the psychology of prediction and the controversy surrounding the value of expertise in forecasting. We examine when experts' knowledge promotes forecast accuracy and whether biases found in psychological studies (including underutilization of relevant base rates and tendencies to extreme prediction) occur in these economic forecasts. Experts' forecasts were compared to forecasts derived from base-rate models that relied on the historical frequencies of economic downturns. The performance patterns of the experts and models crossed over the forecast horizon. Experts outperformed models in shorter-term forecasting, whereas models outperformed experts in longer-term forecasting. These results highlight the abilities and limits of experts and models in prediction and the sources of their inaccuracy.     

A generalized visual latency explanation of the Pulfrich phenomenon

The classical visual latency explanation of the Pulfrich phenomenon is generalized to allow for the possibility that the visual system uses velocity information from motion detectors to compensate for spatial lag due to time lag, in identifying the instantaneous position of a moving object. The results of the reported experiment verify one consequence of the generalized version: the elliptical apparent path is skewed away from the filtered eye. The results suggest also that the extrapolation factor increases with visual latency and that there is a different extrapolation factor for each eye when the eyes are illuminated unequally.     

PATRIOTISM AND POLITICAL OBLIGATION

Arguments aimed at undermining certain accounts of the grounds of political obligations—no matter how successful they may be—fall far short of demonstrating that there are no such obligations. Doubts about the efficacy of these arguments in this latter regard seem even more justified when it is recognized that parallel lines of reasoning can be developed in the area of filial obligations (and probably obligations of friendship and others as well), which arguments provide rather less than conclusive reasons for denying that there are filial obligations (obligations of friendship, and so forth). Furthermore, we have good reason to believe that there are political obligations if patriotism is a virtue, and also that patriotism is indeed a virtue. We therefore have a basis on which to affirm the existence of political obligations—a basis whose soundness is independent of the acceptability of particular accounts of the grounds of political obligation. Hence, even if standard accounts of the grounds of political obligations are problematic in certain respects, we should not regard this consideration as capable by itself of establishing that there are no such obligations.