Frequency of Exposure and Evaluation of Candidates and Campaign Speeches1

Three slides, each showing the photograph of a college-age male, were shown either 5, 10, or 25 times to a total of 95 students (S s). After the presentation, the slides, plus a fourth not previously shown, were presented as photographs of candidates in a campus election, each being paired with a campaign speech. Three speeches consisted of bland platitudes, whereas the fourth argued in favor of a large tuition increase. Ratings of the speeches and the candidates indicated that subjects were accurate in ranking the relative frequency of exposure of the four slides and that the controversial speech elicited less agreement and less favorable ratings than the three other messages. There were U-shaped curvilinear effects of exposure on S s' agreement with the messages, and with ratings of the persuasiveness of the message. Neither exposure nor speech effects were found in ratings of the candidates themselves. Implications of these findings for the frequency of exposure hypothesis (Zajonc, 1968) and for political campaigns are discussed.     

The longitudinal effects of early identification and counseling of underachievers

This study examined the effects of early identification and psychological services on underachievement through a follow-up study conducted six years later. One hundred and seventeen fourth-grade underachievers had been identified through a regression equation and were divided into experimental and control groups. The experimental group received psychological services during their fourth, fifth, and sixth grades from a team of university professors. Psychological services were primarily adult centered, focusing on the redirection of parents and teachers who were the primary influence on the lives of these underachievers. Follow-up studies of them at high school graduation indicated that differences between these groups reached at least the .05 level of significance for class rank, the ACT composite, the ITED composite and its subtests, and level of educational and vocational performance after high school graduation. Differences which were not statistically significant were found for pregraduation aspirations for the immediate future.     

Law, educational reform, and the school psychologist

The law has become a major vehicle for those seeking to reform education. The two areas of reform which most affect school psychologists are the extension of the right to a public education to previously discriminated against and excluded groups, and the extension of the protection of the Bill of Rights to all school children. The potential impact of these areas on the role of the school psychologist is suggested by preliminary findings on one such reform, the right of retarded children to an appropriate education and the guarantee of that right through the provision of procedural due process. Any response to the reform by school psychologists will involve risks and opportunities which must be carefully weighed if a wise choice is to be made from the point of view of both children and the profession.     

Spatial coding of auditory signals

Sequences of nine binary auditory signals (dots and dashes) were presented to 20 subjects in Experiment I. The subjects were instructed to internally organize the signals into two-dimensional arrays. Visual patterns (letters) could be recognized in these imaginary arrays in both upright and rotated orientations. In Experiment II, a group of nine subjects, which was instructed to use spatial imagery of this kind, reproduced significantly longer sequences of signals than nine control subjects. By means of internal spatial organization, experimental subjects were able to reproduce sequences up to 45 signals in length, whereas control subjects recalled near the chance level for portions of sequences longer than nine signals. Three levels of information processing were postulated to account for the results, with spatial organization occupying a mediating level between acoustic and verbal levels.     

After-effects of reinforcement magnitude: Dependence upon context

On a fixed-interval schedule with rat subjects the duration of the post-reinforcement pause was found to be an increasing function of the magnitude of the preceding reinforcer. This relationship was observed when two magnitudes were contrasted closely in time, but not when the subjects were trained on each magnitude until the establishment of stable responding. After the behaviour was stable, the effect of the magnitude of reinforcement re-emerged when 50% of the scheduled reinforcers were omitted. Thus, the positive relationship between the magnitude of reinforcement and the duration of the post-reinforcement pause depended on the context of presentation of a given magnitude.     

Concurrent schedule control of human visual target fixations

Operant conditioning techniques were applied to the study of how target fixations are controlled by the probability of signal occurrence. In a standard vigilance setting, gaze at three illuminable volt meters was monitored by a Mackworth television eye camera with automatic recording capability. Gaze at a given meter produced illumination of the meter, and signals (deflections of the needle on the meter) were scheduled as intermittent consequences of this response. Target fixations were thus placed under the control of concurrent variable-ratio, differential-reinforcement-of-low-rate, and fixed-interval schedules in normal adult volunteers.     

Sensitivity and responsivity measures for discrimination learning

The present report considers alternative measures of sensitivity and response bias for the discrimination learning paradigm. The classical signal detection measures, d′ and β, were compared with their nonparametric equivalents, A′ and B″, with theoretical measures derived from threshold theory and with empirical measures derived from the ROC graph. Differential rabbit eyelid conditioning data from three experiments were analyzed with these measures, and the results of these analyses were used along with other information to determine which measures of sensitivity and response bias are most useful for the analysis of discrimination learning data.