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961.
This study examined the ability of 7 learning disabled children to detect and integrate visual features in a complex display. While the learning disabled children performed more poorly over-all than 6 control children, differences between the two groups were most pronounced when subjects were required to conjoin or integrate visual features to make a decision about the presence of a target item. This finding is discussed with reference to automatic and attention-demanding components of visual perception. 相似文献
962.
963.
Mark W. Steege David P. Wacker Karla C. Cigrand Wendy K. Berg Christine G. Novak Thomas M. Reimers Gary M. Sasso Agnes DeRaad 《Journal of applied behavior analysis》1990,23(4):459-467
Behavioral assessment procedures were used to determine the maintaining conditions of self-injury exhibited by 2 children with severe multiple handicaps. For both children, negative reinforcement (escape from grooming activities) was determined to be the maintaining reinforcer for self-injury (hand/arm biting) within an alternating treatments design. The treatment packages involved the use of negative reinforcement (brief escape from grooming activities) contingent upon a behavior that was incompatible with self-injury (reaching and pressing a microswitch that activated a prerecorded message of “stop”). Treatment was evaluated with a reversal design for 1 child and with a multiple baseline across grooming activities for the 2nd child. The treatment led to a marked decrease in self-injury for both children. At follow-up, high rates of self-injury were reported for the 1st child, but low rates of self-injury and an increase in task-related appropriate behavior were observed for the 2nd child. 相似文献
964.
Three experiments were conducted to determine if a representation of the movement environment is functional in the organization and control of limb movements, when direct visual contact with the environment is prevented. In Experiment 1, a visual rearrangement procedure was employed to show that a representation of the environment that provides inaccurate information about the spatial location of a target can disrupt manual target aiming. In Experiment 2, we demonstrated that spatial information about the position of a target can be destroyed by a visual pattern mask, supporting our claim that the representation is visual. A target-cuing procedure was used in Experiment 3 to show that representation of target position can be useful for premovement organization in a target-aiming task. Together our findings suggest that a short-lived visual representation of the movement environment may serve a useful role in the organization and control of limb movements. 相似文献
965.
David G. White Keith C. Phillips Brian R. Clifford Marie M. Davies Joseph R. Elliott Marian K. Pitts 《Current Psychology》1989,8(2):130-143
The knowledge level about HIV/AIDS among American adolescents aged 16 to 19 has been assessed on several occasions, showing
that in recent years their knowledge base has improved. The knowledge bases of British adolescents and of adolescents younger
than 16 have been largely ignored. In attempting to assess the likely impact on present or future behaviors of increasing
adolescents’ knowledge base about AIDS it is important to also know something of adolescents’ attitudes to intimate relationships
and to sex within those relationships. Previous studies have not linked these two aspects. In this study two hundred London
schoolchildren aged 14 and 15 years completed a questionnaire tapping both their knowledge about HIV infection and its transmission
and their attitudes to intimate relationships. Their answers revealed that they had absorbed the simple media messages about
AIDS, that it kills and that use of a condom during sex offers protection. However they were less well informed on detailed
aspects of prevention, although, worryingly, they believed that they knew all that they needed to about preventive measures.
The majority had attitudes to intimate relationships that were compatible with the message of restricting their number of
sexual partners; however, a significant minority did not. The latter were more likely to deny the risk associated with promiscuity.
It is suggested that school-based AIDS education programs should help individuals to develop new attitudes to intimate relationships
that are compatible with risk avoidance. 相似文献
966.
David P. Wacker Wendy K. Berg Pat Berrie Pat Swatta 《Journal of applied behavior analysis》1985,18(4):329-336
Three severely handicapped adolescents were trained, using a picture prompt package, to complete three complex vocational or daily living tasks. Results indicated that all students required many training sessions to learn the first training task. Following initial training, however, all students generalized their use of the pictures across settings without additional training. The students also needed substantially reduced amounts of training on the remaining two tasks. During maintenance, two of the students continued to perform at relatively high levels of accuracy with and without the picture prompts, whereas one student continued to need the pictures. 相似文献
967.
Two experiments are reported in which expert and novice gymnasts were required to walk across a balance beam as quickly as possible in various vision conditions. In Experiment 1, experts walked faster than novices in all vision conditions, showing the greatest superiority when vision was completely eliminated. Novices were more dependent on vision and were able to maintain their performance as long as a visual sample was available every 250 ms (i.e: 4-Hz samples).The results of Experiment 2 indicate that differences between expert and novice performers in the no-vision condition were not related to the use of a short-term visual representation of the movement environment. Our movement time findings are problematic for specificity of learning models of skill acquisition. As well, film data collected in Experiment 2 were not consistent with models that propose a transition from closed-loop to open-loop control. 相似文献
968.
Perlin E 《Journal of religion and health》1994,33(4):333-340
Man has been aware of the science of genetics, i.e, how living things transport heritable traits to their offspring, since biblical times. However, knowledge regarding genetic disorders has increased greatly in recent years. Advances have been made with respect to both the methodology of genetic diagnosis and the treatment of genetic diseases. Both Jewish and secular ethicists, in general, approve of new genetic diagnostic techniques and genetic therapy if the risk/benefit ratio is favorable for humankind. However, all medical ethicists are still struggling with the ethical question: “To what extent should we tamper with the process of natural selection?” 相似文献
969.
John Northup David P. Wacker Wendy K. Berg Laura Kelly Gary Sasso Agnes DeRaad 《Journal of applied behavior analysis》1994,27(1):33-47
We evaluated the feasibility of local school personnel conducting functional analysis and reinforcement-based treatment procedures within actual classroom settings. Following an initial in-service workshop on functional assessment and differential reinforcement procedures, on-site technical assistance was provided two to four times per month to local school personnel working in transdisciplinary teams. Overall results suggest that local school personnel were able to implement all procedures adequately with periodic technical assistance. In addition, functional analysis was effective in identifying individual maintaining contingencies, the derived treatments were effective, and the results were maintained throughout the approximate 18 months of this investigation. 相似文献
970.
Timothy R. Elliott Cheri L. Marmarosh 《Journal of counseling and development : JCD》1994,72(5):531-537
The authors examined the relation of problem-solving appraisal to health complaints and health-related expectancies among 321 undergraduates. Results indicated that self-appraised effective problem solvers reported fewer current physical symptoms during the 3 weeks prior to assessment and fewer health problems on the day of assessment than did ineffective problem solvers. Self-appraised effective problem solvers also had greater internal and lower chance expectancies for health outcomes than did ineffective problem solvers. Ineffective self-appraised problem solvers reported more negative health perceptions 3 months later during the week of final examinations. Personal control over emotional experiences when engaging in problem solving was significantly predictive of health perceptions. Results are integrated with theoretical models of problem solving and behavioral health. Implications for counseling are discussed. 相似文献