The Strobophotograph: A Device for Measuring Pitch

(Pennington, L. A., &; Berg., I. A., Eds. An Introduction to Clinical Psychology. New York: Ronald Press, 1948. Pp. 595.) Reviewed by Jane Dorroch.     

The Relation of the Galvanic Skin Reflex Recovery Curve to Reactivity,Resistance Level,and Perspiration

The effect of stimulus compounding in classical conditioning was investigated by conditioning one group of rats to a compound CS consisting of a buzzer and light and then conditioning separate groups of rats to the individual elements of the compound CS. On hurdle-jump test trials, the group of Ss conditioned to the compound CS performed better than Ss conditioned to the elements of the compound. Strength of conditioning to each of the elements of the compound CS was about equal. There was some evidence of a summation effect resulting from conditioning to the compound CS. Strength of conditioning to the compound CS was somewhat greater than the sum of the response strengths conditioned to the elements of the compound CS.     

The Equation of the Galvanic Skin Reflex Curve: I. The Dynamics of Reaction in Relation to Excitation-Background

Previous studies of double alternation learning have failed to demonstrate learning of extended double alternation sequences by nonprimate Ss. The present study investigates whether such learning can be induced by manipulations of the training procedure. Pigeons (N = 6) were trained on a double alternation procedure with continuous trial presentations. A new double alternation sequence began after each error so that the length of a sequence was a function of the accuracy of performance. All Ss learned the double alternation pattern for the first four positions of the sequence, but none learned consistently to emit longer sequences. The degree of learning was a function of several procedural variables, particularly the use of an appropriate correction procedure.     

A Mechanical Model of the Conditioned Reflex

(Wertheimer, M. Productive Thinking. New York: Harper, 1945. Pp. 224.). Reviewed by Nathan Israeli.     

A Scale for Measuring Persistence

Summary

The effectiveness of a white expert (psychologist) and that of a peer in influencing Negro mothers of low socioeconomic status were compared. Each subject was given advice by the expert after her young child had been evaluated by him. Subjects then received a positive, neutral, or negative opinion of the expert's advice from a confederate peer. Results indicated that the expert was more effective than the peer. While both sources had a significant immediate effect, the expert was also significantly influential in having subjects act after having left the testing situation. It was concluded that expertness was the strongest factor, even though other factors like race and referent-group membership might have worked against it.     

A Device for Studies in Weight Discrimination

Within-Ss 2×3 factorial design, with two methods—recall (REC) and anticipation (ANT)—and three levels of list difficulty, was used for testing the hypothesis that ANT is superior to REC only if the learning task is comparatively difficult. Each of 20 male university students learned, both by the methods of REC and ANT, pairs of 10 words and digits (WD), eight CVCs of moderate and six CCCs of low association values. Analysis of variance, except for the main effect of method, yielded high significance for all the main effects and interactions. In learning paired-associate lists for comparatively easier tasks (WD and CVC lists), no significant difference was found between the two methods. For CCC pairs, however, a significant difference was found (t = 2.50, p < .02), which supported the hypothesis. A tentative modification was suggested in W. K. Estes's theory of reinforcement in human learning.     

A Scale for Measuring Persistence in Children

Persistence and its assessment have been studied since the 1920s. One common approach in measuring persistence has been through testing the subject's ability to solve difficult or monotonous problems. Another approach has been through questionnaires. Although persistence is very important in academic achievement and in the general development of personality, no questionnaires have been developed for measuring persistence in children. The present research concerns the development of such a scale. It includes 40 items and was tested on 322 Israeli children aged 7-13. The internal reliability of the scale (Cronbach alpha) was .66, and the test-retest reliability after 6 months was .77. The scale differentiated active gymnasts from nongymnasts as well as persistent gymnasts from dropout gymnasts. In addition, significant correlations were found between the scale and the need-persistence measure of the Rosenzweig Picture Frustration Study, Locus of Control, and other measures. We discuss these findings along with the significance of persistence in everyday life.     

A Projection Caliper for Measuring at a Distance

(Frankl, Viktor E. The Doctor and the Soul. New York: Knopf, 1955. Pp. 280.) Reviewed by Robert M. Allen.     

A Brief Questionnaire for Measuring Self-Efficacy in Youths

The current study examined the reliability and validity of the Self-Efficacy Questionnaire for Children (SEQ-C) in a sample of young adolescents (N = 330). Factor analysis of the SEQ-C revealed three factors that were in keeping with the intended subscales: social self-efficacy, academic self-efficacy, and emotional self-efficacy. Furthermore, results showed that the SEQ-C has satisfactory internal consistency. Finally, SEQ-C scores correlated in a theoretically meaningful way with a measure of depression. That is, the lower children's SEQ-C scores, the higher their level of depression. Possible applications of the SEQ-C are briefly discussed.     

A Generalized Strategy for Measuring Performance in the Velocity-Position Phase Plane

Subjects pressed a key down as fast as possible but controlled the response duration of the keypress. The task required long (300 ±100 msec) and short (150±50 msec) durations in both simple (long only or short only) and choice (mixed long and short) conditions. Choice reaction time was slower than simple reaction time, but reaction time for long and short durations did not differ significantly for either simple or choice conditions. This finding fails to support a study by Klapp, Wyatt, and Lingo (1974) which found reaction time differences between long and short durations for choice but not simple conditions.     

A Tachistoscopic Device for Work with Subhuman Primates

The present study examined predictors of siblings’ relations in 202 young adults (aged 21–32 years), who completed the Adult Sibling Relationship Questionnaire and the Narcissistic Personality Inventory. Results indicate that warmth between siblings is explained by gender (with women feeling closer), perceived paternal favoritism, low levels of narcissism, and an interaction suggesting that paternal favoritism moderates the link between narcissism and sibling warmth. Conflict between siblings was explained by gender (sisters), age, parental favoritism, high levels of narcissism, extreme levels of similarity or dissimilarity between siblings, and interactions indicating that older age is a predictor of conflict between siblings among women but not among men. The impact of parental favoritism and narcissism on sibling relationships in young adulthood was discussed.