Facilitation and helplessness: The interaction of perceived difficulty and importance of a task

Experimentally induced failure sometimes produces helplessness and sometimes facilitation on subsequent tasks. A model which accounts for this in terms of variations in perceived task difficulty and importance and variations in the cost of effort is proposed. Predictions from the model were confirmed in two experiments using the finger shuttlebox. When subjects expected the test task to be easy, importance of test outcome did not affect performance. However, when they expected the test task to be difficult, low outcome importance led to debilitation, and high importance to facilitation. If, in this condition, subjects experienced initial failure on the task perceived as difficult and important, helplessness rather than facilitation was observed. The model proposed may account for some of the conflicting results obtained in laboratory studies of human helplessness.     

The simultaneous and independent measurement of penile circumference and length

It has been recently shown that in the early stages of erection, the human penis undergoes a substantial length change that is not detected using circumferential measurement devices. The present report introduces a relatively simple device that can assess changes in both length and circumference. The device promises to provide a low-cost alternative to the precision and sensitivity associated with plethysmography.     

Duration discrimination in a series of rhythmic events

Duration discrimination of the last of a series of four clicks was investigated. Examination of psychophysical functions from eight subjects revealed evidence for a Weber’s law model relating discrimination to base interclick interval. Also, the point of subjective equality was seen to change reliably as a function of base rate.     

Selective perception of events

Two hundred and twelve subjects were given one of two interpretive sets prior to viewing an event. Following observation, the first interpretation was discredited, and subjects were asked to interpret the event they had seen under the contrasting set. Some subjects were only provided with the alternate interpretation, while others were also given an opportunity to view the event a second time. Both the perceptual segmentation and the subjects' impressions of the participants in the event were assessed. Results disclosed that (1) the two sets produced both differing perceptual organization and differing impressions of the participants; (2) reversing the sets produced a reversal of the impressions of the participants only when accompanied by a second viewing; and (3) the reversal of the impressions was accompanied by a shift in the perceptual organization of the event. It was concluded that observers may differ in their initial perception of an event as the result of differences in prior expectations, and that the resulting biased sample of information they acquire may limit their retrospective reinterpretation of the event.     

Pupillary attributions of college students to happy and angry faces.

As evidence for an hypothesis that pupil size plays an important role in nonverbal communication, Hess (1975) has reported that adults draw in appropriately sized pupils on his happy and angry faces task. However, he did not report a statistical test of his data. In this study, we replicated Hess' research and found congruent with his hypothesis that college students (n = 223) draw in significantly larger pupils on the happy face.     

Psychoanalysis and systems in family therapy

This paper describes three frames of reference for understanding family function. The three frames are (1) The Life-cycle of the Family, (2) The Intergenerational, Historical Aspects of the Family, (3) The Interactional Structure of the Family. It is suggested that these three frames can provide a detailed formulation of family functioning and disturbance in order to plan rational foci, strategies, techniques and aims of family therapy.     

Children in family therapy

The distinctive skills of child psychotherapy can be utilized in the development of a form of conjoint family therapy especially applicable to the field of child psychiatry. It is suggested that the engagement of children in the process particularly enhances the specific characteristics and potentialities of this form of treatment.     

A multi-element analysis of the effect of teacher aides in an "open"-style classroom

Open classrooms with few rules, individualized instruction, and informal class organization present new problems for the application of behavior principles. The effects of three types of teacher aides on student achievement and on-task behavior were studied. Each was compared with a standard no-aide condition. Subjects were 54 third graders in two "open"-style classrooms. The three types of aide, helping adult, disciplinary adult, and helping fifth-grade aide, were compared in a multi-element design with a no-aide control. The helping-adult aide significantly affected the academic output of the class, when compared with the no-aide condition. All aide conditions produced more academic work and on-task behavior than did the standard no-aide condition.