Outflow and inflow in movement duplication

Following prolonged exposure to two vertical grating patterns differing in spatial frequency—one pattern illuminated in green light alternated with the other pattern illuminated in red light—human observers will sometimes report seeing desaturated complementary colors when presented with a neutrally illuminated test field consisting of adjacent halves of the two adapting gratings. The number of such color reports increases as the difference between the spatial frequencies of the adapting gratings increases. This frequency-specific chromatic aftereffect is similar to that obtained with orientation-specific color adaptation and may be mediated by neural “channels,” sensitive to both color and frequency input, which are similar to units known to exist in the visual systems of lower organisms.     

Functional equivalence between same-different classifications and judged similarity of Markov patterns

This experiment represented an initial at tempt at comparing same-different classifications and similarity judgments of Markov histoforms sampled from three different schema families. A measure of individual stimulus variability was more strongfy related to classification responses than to judged similarity. Dichotomous responses, derived from the similarity data by imposing threshold criteria, were found to be highly similor to real classification responses when the threshold values were estimated directly from the latter; little correspondence, however, was obtained using optimal classification criteria. The results support the notion that somewhat different features are used in making classification responses and similarity judgments, and indicate the need for developing more sensitive tasks involving controlled scanning of pattem information.     

A Plexiglas helmet and catheter protection assembly for chronic intravenous administration of drugs in small primates

A restraint and catheter-protection system consisting of a Plexiglas helmet and a nylon-tubing protector line has been developed to permit the long-term study of drug self-administration in monkeys. Frequent observations of monkeys in the system over a period exceeding a year have shown that the technique satisfies the requirements for long-term study of drug administration through an indwelling catheter and avoids several recurring problems inherent in other protection systems. Additional applications of the helmet and protector line are discussed.     

Self-esteem, attitude similarity, and attraction

Subjects evaluated three stimulus persons on several rating scales who were either 10%, 50%, or 90% similar to themselves in attitudes Subjects were divided into low, moderate, and high self-esteem groups on the basis of an earlier Q sort The results showed a strong positive relation between perceived similarity and positive attribution for each of the dependent variables, including liking, sophisticated, intelligent, sincere, happy, and a social distance scale A negative relation was obtained for two undesirable traits, arrogant and cynical Self-esteem interacted with similarity on several of the measures The difference between self-esteem groups was largely restricted to highly dissimilar stimulus persons Moderate esteem subjects were more favorable toward dissimilar persons than either of the other two groups, and the high and low groups tended to resemble each other more than either group resembled the moderate esteem group These results were discussed in terms of the relation between self-esteem and adjustment, and in terms of McGuire's (1968) theory that predicts a nonmonotonic relation between self-esteem and attitudes.     

Disruption of proofreading by irrelevant speech: Effects of attention,arousal or memory?

A series of five experiments examined the effects of irrelevant speech on proofreading and memory. Four of the experiments used a proofreading task and showed that the deleterious effects of irrelevant speech: (1) depend on the speech being meaningful, (2) are only present when the burden on short-term memory is low and (3) are manifested in a lower detection rate for non-contextual as opposed to contextual errors. Neither the spatial location of the speech (either in terms of spatial dispersion of sources or spatial movement of a single source) nor the intensity of the speech (in a range bounded by 50 dB(A) and 70 dB(A)) had any effect on proofreading. Late selection models of attention are favoured by the results in preference to models having arousal, short-term memory or early selection in attention as their basis. A final experiment showed serial recall for visual lists to be impaired by the presence of any speech-like sound (including reversed speech and speech in an unfamiliar language) which suggests a set of phenomena qualitatively different from those associated with proofreading. Throughout the article the practical consequences of the findings are emphasized.     

Shyness and sociability: a dangerous combination for illicit substance use in adolescent males?

Researchers have hypothesized that behavioral problems are accentuated when a shy person wants to be with other people. This need to be with others--sociability--is a related but separate construct from shyness. The purpose of the present study was to examine the relationship of shyness and sociability to illicit substance use in a sample of 654 male high school students. It was found that, in general, shy male adolescents were significantly more likely to use illicit substances when compared to those who were not shy. Those who were shy and highly sociable were significantly more likely to use hallucinogenic substances than were those who were shy and low to moderate in sociability as well as those who were not shy. Although not significant, there was a trend toward more cocaine and marijuana use among those who were shy and highly sociable. The implications of these findings for those who work with adolescents are discussed.     

Physique Contrast Effect: Adverse Impact of Idealized Body Images for Women

Adherence to an attractiveness ideal was considered as a possible mediator of a physique contrast effect among Caucasian women. Following exposure to photographs of models typifying idealized thin physiques, women displayed decreased self-esteem and increased self-consciousness, social physique anxiety, and body dissatisfaction. Although women with low adherence to an attractiveness ideal seemed to be advantaged by having greater self-esteem, less self-consciousness, and lower physique anxiety or dissatisfaction than their high adherence counterparts, these women did not display any unique resistance to the contrast effect. High affirmation of an attractiveness ideal was associated with exceptionally high potential for disordered eating. Eating disorder potential did not show influence of the contrast effect, but long-term implications were considered.     

The assessment of gender role stress for Chinese

The present study aimed to extend the generality of the construct of gender role stress (GRS) to Chinese samples. Specific objectives included (1) devising Chinese versions of the Masculine Gender Role Stress Scale (MGRS) and Feminine Gender Role Stress Scale (FGRS) developed by Eisler and his colleagues (2) examining the relationship between GRS and gender role orientation, and (3) evaluating the concurrent validity of GRS by correlating it with a measure of health adjustment. Fifty-one male and 58 female Chinese college students in Hong Kong participated in Study 1, which aimed to develop Chinese versions of the two GRS scales. Similar to Americans, Chinese male students scored higher on the MGRS scale, but lower on the FGRS scale than Chinese female students. Students' scores on the two GRS scales were independent from their global ratings of stereotypic masculinity and femininity. A second sample, consisting of 46 male and 73 female Chinese nurses, was recruited for Study 2, which evaluated the association between GRS and health adjustment. As hypothesized, a high level of MGRS or FGRS was positively related to a high level of health and mental health disturbances for both male and female nurses.This study was funded in part by the Asia Scholarship for Research on Women 1992/93 of the United Board for Christian Higher Education. The authors would like to thank Professor Richard M. Eisler for his permission to translate the MGRS and FGRS scales into Chinese, and the Association of Hong Kong Nurses for their assistance in data collection.