Punishment persistence and sequence: Some effects of P-length and N-length in the rat

In a runway investigation, two groups of rats received partial punishment training with P-lengths of 1, 2, and 3 (Group P123) and P-lengths of 1 (Group P1), respectively. Two additional groups received partial reinforcement with N-lengths of 1, 2, and 3 (Group N123) and N-length of 1 (Group N1). An additional group was given unpunished continuous reinforcement in the runway, but received control shocks in a separate apparatus. Following training all subjects received punished extinction (shock plus nonreward). The results indicated that P-length increased resistance to punished extinction, however N-length did not have the corresponding effect. In addition, partial reinforcement did not increase resistance to punished extinction relative to continuous reinforcement. These results were interpreted within a sequential-theoretical framework.     

Reward,affect, and young children's motivational orientation

In this study we examined the proposition that the detrimental effect of reward on young children's intrinsic motivation may be due to increased negative affect associated with performing the target task under expected reward conditions. Fifty-six children were randomly assigned to one of three non-reward mood induction conditions (positive, negative, neutral) or to a reward, neutral mood induction condition. Children then played an attractive game. Subsequent intrinsic interest was measured in a free-choice period in which rewards were neither forthcoming nor expected and children could freely choose to play with the target game or with other toys. It was found that rewards produced a less positive mood state, which subsequently was related to lowered intrinsic interest in the free-choice situation. In general, the results for the reward/neurtral mood condition paralleled those for the non-reward/negative mood condition. It was concluded that instrumental rewards may induce a temporary negative mood state in young children that can undermine intrinsic motivation.This research was sponsored in part by a Faculty-Grant-in-Aid (No. 420893) from Arizona State University, and by a Faculty Release Award from the Department of Family Resources and Human Development, both to the first author. The authors would like to express their appreciation to Barry Arbuckle, Anna Burke, Mia Nymoh, Darlene Richmond, Phil Swanson, and Irma Vega for their assistance in data collection.     

The Association of Gender,Ethnicity, and Length of Residence in the Bay Area to Adolescents' Knowledge and Attitudes about Acquired immune Deficiency Syndrome1

A large-scale survey was conducted in San Francisco to assess adolescents' knowledge, attitudes, and beliefs about AIDS. Data obtained from 1,326 adolescents demonstrate marked variability in knowledge across informational items, particularly about the precautionary measures to be taken during sexual intercourse which may reduce the risk of infection. The findings identified ethnic differences in knowledge about AIDS, with Asians having a lower overall knowledge score than Hispanics, Blacks, and Caucasians. Adolescents who score below the median for total number of correct responses were more than twice as likely to perceive themselves as very susceptible to AIDS. A comparison of surveys from other parts of the country suggests that proximity to an AIDS epicenter has great saliency for adolescents with respect to their knowledge and attitudes about AIDS. The proportion of adolescents reporting correct responses, for questions in common, between the surveys indicates that students in San Francisco score appreciably higher. A framework is also described for providing school-based risk-reduction health education for adolescents.     

Individual differences in television comprehension

Two experiments explored individual differences in memory and comprehension for adults presented information on television. Experiment 1 tested the correlation between comprehension of television and reading with young adults. The ability to comprehend these two forms of media was significantly correlated (r = .69). This finding is contrary to results from our previous study with third and sixth graders (Pezdek, Lehrer, & Simon, 1984). Experiment 2 probed two specific individual differences factors as predictors of television comprehension. The results were that good television comprehenders (1) had higher visual/spatial ability, as assessed by psychometric test performance, and (2) were more likely to utilize an imagery-based strategy in the sentence-picture verification task of Clark and Chase (1972) (e.g., “STAR IS ABOVE PLUS”). These results suggest differences in the comprehension processes that operate on information presented in different forms of media.     

Religious youth cults: Alternative healing social networks

The motivation of youth to join esoteric religious cults considered as psychopathology is a limited and reductionistic interpretation. Youthful devotees do demonstrate symptoms of psychic distress, which appear to be significantly ameliorated through participation in religious youth cults. Two major trends in social history reveal the sources of youth cults: loss of faith in the rationalistic Western cosmology and loss of the extended family system. The religious youth cult possesses many of the properties of the normal psychosocial system, which is a critical social structure for healthful coping in the world. As a normative social system, the religious youth cult is an alternative healing system for the existential crises of contemporary youth.     

Are there different patterns of cerebral asymmetry between dyslexic subtypes?

The purpose of this research has been to analyze the cerebral asymmetry in dyslexic children and, specifically for demonstrating whether there are different patterns of cerebral asymmetry among subtypes of dyslexia. We used a sample of 89 dyslexic children divided into subtypes obtained from the Jimenez and Ramirez (2002) study. The dual-task method was used to assess hemispheric specialization. The data were compared with that obtained from a control group of normal readers of same age (CA; N= 37) and with a younger reading level control group (RL; N= 40). We found that in the dyslexic group, similarly to the younger reading level group, a high percentage of children showed convergence in the left hemisphere of both linguistic and spatial functions. This pattern was also found in the RL control group. On the other hand, we did not find different patterns of cerebral asymmetry between dyslexic subtypes.     

Factors related to young people's attitudes to the consumption of alcohol and other psychoactive substances

In this study we analyzed variables related to the consumption of alcohol and other psychoactive substances among young people, and to their attitudes towards experimentation. The sample was made up of 775 pupils aged 12 to 16 from four secondary schools in the Principality of Asturias (northern Spain). The results obtained confirm the multi-causal nature of these phenomena. The attitudes of young people towards substance use was found to be more favourable the lower the perception of risk, the more mistaken their beliefs and the more permissive their disposition to the use of alcohol and other illegal drug. Other determining factors are their relationship with peer groups that use drugs, antisocial behaviours and attention-seeking indications.     

Object- and location-based inhibition of return in younger and older adults

When a cued object moves to new spatial coordinates, inhibition of return (IOR) with younger adults is found at the original cued location (location-based IOR) and at the current location of the object (object-based IOR). Older adults, however, show only location-based IOR. To determine whether this pattern of results represents a general age-related deficit in object-based IOR, the authors used static displays in which the placeholders (i.e., objects) were either present (location-based IOR+object-based IOR) or absent (location-based IOR only). Both age groups showed location-based IOR, but the older adults failed to show object-based IOR, consistent with age-related differences in visual pathways.