THE EFFECTS OF CONTINGENT AND NONCONTINGENT REWARDS ON THE I.Q. SCORES OF CHILDREN OF ABOVE-AVERAGE INTELLIGENCE1

This study investigated the effects of candy reinforcement on I.Q. test scores in first and second graders of above-average intelligence. Thirty-six subjects were randomly assigned to one of three groups and either given candy contingent on correct responses, noncontingently, or not given candy. After measuring all subjects on Form L of the revised Stanford Binet, each subject in the contingent group was given an M & M immediately following each correct answer on Form M, while a yoked-comparison subject received the same number of M & M's before responding to a question and therefore without regard to correctness of answers. It was expected that both types of candy administration would produce higher I.Q. change scores than the no-candy control group, but there were no statistically significant differences among the three treatments. The differences between the first and second test scores were 4.17 (contingent), 4.67 (noncontingent), and 1.00 (no reinforcement). Reasons for this failure to replicate previous findings were discussed.     

The effects of adaptation to square-wave gratings as a function of grating orientation

An adaptation technique was used to measure the selectivity or tuning for grating orientation in the visual system for different orientations of the inspection stimulus. Duration thresholds for grating patterns of constant luminance were determined for 13 test gratings oriented from ±5 to 90 deg away from each of five adaptation gratings: 0, 22, 45, 67, and 90 deg. Threshold data obtained for test gratings without prior adaptation indicated higher sensitivity for gratings oriented along the horizontal and vertical axis than along the oblique axis. After adaptation, thresholds increased (sensitivity was reduced) for gratings having similar orientations as the test gratings. However, the functions relating sensitivity reduction to degree of angular disparity between test and adaptation grating did not vary across the five inpsection orientations, i.e., selectivity or tuning for grating orientation appeared to be independent of the orientation of the adapting stimulus.     

THE PSYCHOLOGICAL REALITY OF LINGUISTIC SEGMENTS RECONSIDERED

LARSEN, S. F. The psychological reality of linguistic segments reconsidered. Scand. J. Psychol. , 1971, 12, 113–118.–Experiments using the so-called click-technique (Fodor & Bever, 1965) and testing the hypothesis that linguistic constituents are the units of speech perception are shown to rest on logically inadequate analysis of the data. Therefore the hypothesis was submitted to another test in the present experiment, and it was not substantiated. At the same time a predictiondirectly testing the basic postulate of the click-technique, viz., that auditory perceptual units resist interruptions by clicks, was clearly disconfirmed. However, due to insufficient precision of the postulate, results obtained by this technique seems uninterpretable at present.     

Size scaling in visual pattern recognition

Human visual recognition on the basis of shape but regardless of size was investigated by reaction time methods. For successive matching of random figures, reaction time increased linearly with the linear size ratio of stimulus pairs. For single-character classification, reaction time increased with divergence between cued size format and stimulus format such that for character nonrepetitions, the increment in latency was approximately proportional to the logarithm of the linear size ratio of the two formats. However, when reactions to character repetitions were faster than those to nonrepetitions, the repetition reaction time function was similar to that for successive matching of random figures. The results suggested two processes of size scaling: mental-image transformation and perceptual-scale transformation. Image transformation accounted for matching performance based on visual short-term memory, whereas scale transformation accounted for size invariance in recognition based on comparison against visual representations in long-term memory.     

Working mothers,sex differences,and self-esteem in college students' self-descriptions

This study examined whether a relationship exists between maternal employment and self-esteem of offspring. A questionnaire incorporating the Adjective Generation Technique (AGT) was administered to undergraduate psychology students from intact two-parent families. Subjects were divided into four categories: males whose mothers worked during their childhood (n=33), males whose mothers remained home (n=49), females whose mothers worked (n=54), and females whose mothers remained home (n=49). Data were analyzed using a 2 × 2 analysis of variance. Results indicated no differences in self-esteem for subjects of either sex in conjunction with the employment of their mothers. Instead, the subject's sex was the critical component affecting self-esteem. Males reported themselves significantly more favorably than did females.     

Validity of Adler's active-constructive,active-destructive,passive-constructive,and passive-destructive typology

This research investigated the validity of Adler's typology: active-constructive, achievement-oriented; active-destructive, hostile; passive-constructive, attention-seeking; and passive-destructive, interpersonal detachment. Four possible measures of the constructive-destructive dimension and two possible measures of activity-passivity were used, with all eight possible combinations being used to establish the Adlerian types (active-constructive, etc.). A total of 192 male undergraduates served as subjects. The Full I-E Scale in combination with the CPS Activity-Lack-of-Energy Scale produced groups that demonstrated the Adlerian relationships, active-constructive, achievement-oriented, and so forth. There were strong secondary personality manifestations within the respective groups.     

Choice reaction time to movement of eccentric visual targets during concurrent rotary acceleration

This study investigates the influence of concurrent rotary acceleration on choice reaction time (RT) to a small, accelerating visual cursor on a cathode-ray tube. Subjects sat in an enclosed rotating device at the center of rotation and observed a 3-mm dot accelerating at different rates across a cathode-ray tube. The dot was viewed at various eccentricities under conditions of visual stimulation alone and with concurrent rotary acceleration. Subjects responded to both vertical and horizontal dot movements. There was a significant inverse relationship between choiceRT and level of dot acceleration (p< .001), and a significant direct relationship between choice RT and eccentricity (p< .001). There was no significant difference between choiceRT to vertical or horizontal dot motion (p>.25), and choiceRT was not significantly affected by concurrent rotary acceleration (p>.1Ol. The results are discussed in terms of the effects of vestibular stimulation on choiceRT to visual motion.     

Primacy and recency effects in nonhuman primates.

The reports of primacy and recency memory effects in nonhuman primates have been criticized because they have all used an initiating response. That is, the presentation of the to-be-remembered list of items was always contingent on a response being initiated by the nonhuman primate. It has been argued that this initiating response improves performance for early items in the list, resulting in the occurrence of the primacy effect, independent of any memory processing mechanism. This criticism was addressed in the present study by not using an initiating response prior to the presentation of the list. Nevertheless, both a primacy and a recency effect were observed in all 6 rhesus monkeys evaluated using a serial probe recognition task. Thus, the results are similar to those for humans, in that both primacy and recency effects can be obtained in nonhuman primates. A brief literature review is included, and it is proposed that the primacy and recency effects observed in humans, nonhuman primates, and infraprimates can be explained within the context of the configural-association theory.     

A Text of Identity: Frances Brooke and the Rhetoric of the Aging Spinster

Frances Brooke, writing in 1755 in London, England, selected the figure of the aging spinster as her alter ego when she wrote and edited a thirty-seven issue periodical, The Old Maid. Analysis of the periodical and the cultural environment in which Brooke wrote explains her choice of persona in terms of the issues she faced as a woman producing writing to be read largely by male contemporaries. This analysis reveals some of the underlying stereotypes of aging and identity in the period as well as the way these stereotypes could be used by a clever writer.