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排序方式: 共有160条查询结果,搜索用时 15 毫秒
101.
AbstractObjective: Increased levels of dietary restraint are associated with deficits on many cognitive tasks. Less is known about how individual differences in restraint influences complex cognition such as reasoning which is the focus of this research.Design: Two experimental studies are reported. In study 1, participants (n?=?158) completed a causal conditional reasoning task with statements about weight-related and general causal relationships. Study 2 replicated and extended study 1. Participants (n?=?108) completed a causal conditional reasoning task focusing on behavioural causes of weight change or general statements.Main outcome measure: Causal conditional reasoning task performance.Results: In study 1, levels of dietary restraint were negatively associated with reasoning abilities for weight-related statements only. Study 2 replicated the negative association between dietary restraint and reasoning finding the effect in both weight-related, and general, causal judgements.Conclusion: The novel findings show that individual differences in dietary restraint have a wider relationship with cognition than previously demonstrated. Results tentatively support theoretical explanations of a reduction in cognitive capacity, rather than differences in belief, explaining reasoning deficits. These findings open an interesting avenue for research and might have implications for effective decision making about personal health behaviours, such as food choice. 相似文献
102.
Yanda Van Rood Els Goulmy Els Blokland Jos Pool Jon van Rood Hans Van Houwelingen 《Psychology & health》2013,28(3):229-244
Abstract Results are reported from a field study on 47 healthy subjects preparing and defending a PhD-thesis in the Netherlands. Measurements before, about and after thesis defense are used to quantify the temporal effects of this perceived stressor on immunological and psychological variables. Moreover, multivariate analysis of variance for repeated measurements was used to explore a potential causal relationship between changes in immune variables and changes in psychological variables. Significant temporal effects were observed for the immunological variables, percentage CD4 cells (p = 0.037), the proliferative response to pokeweed mitogen (p = 0.040), concanavalin A 10 μg/ml (p = 0.010) and concanavalin A 40 μg/ml (p = 0.005) and the psychological variables, average subjective distress (p = 0.002), highest subjective distress (p = 0.000) and the coping strategy depressive reaction pattern (p= 0.02). No evidence was obtained for a causal relation between the immunological and psychological variables. 相似文献
103.
Vollmer TR Hagopian LP Bailey JS Dorsey MF Hanley GP Lennox D Riordan MM Spreat S 《The Behavior analyst / MABA》2011,34(1):103-110
A task force authorized by the Executive Council of the Association for Behavior Analysis International (ABAI) generated the statement below concerning the techniques called restraint and seclusion. Members of the task force independently reviewed the scientific literature concerning restraint and seclusion and agreed unanimously to the content of the statement. The Executive Council accepted the statement, and it was subsequently approved by a two-thirds majority vote of the general membership. It now constitutes official ABAI policy. The position statement is posted on the ABAI Web site (www.abainternational.org/ABA/statements/RestraintSeclusion.asp). The purpose of the position statement is to provide guidance to behavior analysts and other professionals interested in the position of ABAI on these controversial topics. In extreme cases, abuses of procedures erroneously used in the name of behavior analysis are not defensible. On the other hand, behavior analysts acting ethically and in good faith are provided with guidelines for sound and acceptably safe practice. To the extent that behavior-analytic positions influence public policy and law, this statement can be presented to officials and lawmakers to guide informed decision making. At the conclusion of the document, a bibliography is provided of articles and presentations considered by one or more task force members in developing the position statement. 相似文献
104.
Frankel J 《The International journal of psycho-analysis》2011,92(6):1411-1436
The analytic state of consciousness is a particular regressive altered state in the patient characterized by an increased sensitivity and reactivity to impressions arising from both the inner world and the analyst, a heightened sense of dependence and vulnerability, a permeability of boundaries in regard to the analyst, and a shift toward functioning on the basis of omnipotent fantasy in the analytic relationship. These changes are accompanied by a feeling of realness of one's psychic reality, but without any true loss of reality testing. Based on an analysis of the structure of play, this state can itself be understood as a kind of play; it serves as a foundational transference underlying more specific transference manifestations; and it is central to the analytic process. Over time, in response to physical aspects of the analytic setting, its safety, the analyst's emotional accompaniment, and a generally restrained analytic stance (an issue I discuss in some detail), it emerges in a more developed form that promotes symbolization and ownership of aspects of self, greater emotional presence, and a deeper sense of meaning in one's experience. Additionally, the concept of the analytic state of consciousness provides a new look at the role of abstinence and frustration in analytic process. 相似文献
105.
Suzanna Hernandez Jillon S. Vander Wal Bonnie Spring 《Journal of psychopathology and behavioral assessment》2003,25(1):49-55
Although several experimental techniques are effective in inducing negative mood, none has established efficacy over repeated testing. The lack of mood induction tools validated across repeated administrations impedes study of emotional changes in the same individual over time. A brief, sad mood induction combining music and an autobiographical memory was administered to 17 women on 6 occasions (two 3-day sets over a 2-week period of time). Mood was measured before and after the induction procedure. Repeated measures ANOVAs showed that the induction produced a large increase in POMS depression (d = 1.48) that recurred consistently across all testing days. A brief negative mood induction combining music and autobiographical memory appears suitable for use in studies that involve repeated administrations. 相似文献
106.
Resurgence is a reliable, transient effect that only occasionally is replicated more than once within a single experiment or subject. In the present experiments, within‐session resurgence was generated repeatedly by dividing individual sessions into three phases (Training, Alternative‐Reinforcement, and Resurgence‐Test). In Experiments 1 and 2, resurgence reliably occurred in most of the 22‐30 daily sessions when responding was reinforced on, respectively, fixed‐ and variable‐interval schedules. Resurgence magnitude and duration did decrease across replications for some subjects, but not for others. To examine the utility of the procedure in studying the effects of an independent variable on resurgence, in Experiment 3 the effects of rich and lean baseline and alternative reinforcement rates on resurgence were compared. The target response was eliminated more rapidly, resurgence occurred more often, and usually was greater following rich alternative reinforcement rates. Resurgence was of greater magnitude when the baseline reinforcement rate was relatively lean compared to the alternative reinforcement rate. These experiments provide a reliable method for generating resurgence within individual sessions, instead of across multiple‐session conditions, that can be repeated over many successive sessions. 相似文献
107.
Effects of GABA modulators on the repeated acquisition of response sequences in squirrel monkeys 下载免费PDF全文
Campbell UC Winsauer PJ Stevenson MW Moerschbaecher JM 《Journal of the experimental analysis of behavior》2004,82(1):37-56
The present study investigated the effects of positive and negative GABA(A) modulators under three different baselines of repeated acquisition in squirrel monkeys in which the monkeys acquired a three-response sequence on three keys under a second-order fixed-ratio (FR) schedule of food reinforcement. In two of these baselines, the second-order FR schedule and the discriminative stimuli for the response sequence were manipulated ("chain-strained" and "tandem-strained"). In the third baseline condition, response-independent tail shock was presented during acquisition of the response sequence. All of these baselines maintained high error levels and produced slow rates of acquisition. Under both the chain-strained and tandem-strained conditions, the positive GABA(A) modulator triazolam (0.0032-0.1 mg/kg) and the negative GABA(A) modulators beta-CCE (ethyl-beta-carboline-3-carboxylate; 0.01-1 mg/kg), beta-CCM (methyl-beta-carboline-3-carboxylate; 0.0032-0.1 mg/kg), and FG-7142 (methyl-beta-carboline-3-carboxamide; 0.18-10 mg/kg) dose-dependently decreased overall response rate compared to administration of saline (control). Under the same two conditions, triazolam and the negative GABA(A) modulators also increased the percentage of errors; however, the effects on accuracy frequently depended on the baseline condition and the particular modulator. In contrast, triazolam only decreased errors and enhanced acquisition in the presence of concurrent response-independent tail shock when compared to saline administration under this condition. The neutral GABA(A) modulator, flumazenil (1 mg/kg), had no effect on rate or accuracy of responding when administered alone, but antagonized the rate-decreasing and error-increasing effects produced by the negative GABA(A) modulators. Together, these data suggest that the effects of both the positive and negative GABAA modulators on acquisition can be similar in squirrel monkeys (i.e., both types of modulator may produce rate-decreasing and error-increasing effects) and that their effects on acquisition depend, in part, on the environmental conditions maintaining acquisition. 相似文献
108.
Silberberg A Murray P Christensen J Asano T 《Journal of the experimental analysis of behavior》1988,50(2):187-195
Humans chose 10 times between two roulette wheels projected on a monitor. During the first trial, the left wheel provided a hypothetical $100 with p = .94, and the right wheel provided $250 with p = .39. A titration procedure adjusted the probability of a $250 win across trials to permit estimation of an indifference point between alternatives. In Experiment 1, intertrial-interval duration (25 vs. 90 s) and whether sessions began with an intertrial interval or a trial were varied in a 2 × 2 design in this risky-choice procedure. Risk aversion (preference for the $100 wheel) increased with intertrial interval but was unaffected by whether sessions began with a trial or an intertrial interval. In Experiment 2, all sessions began with a trial, and subjects were informed that the experiment ended after 10 trials. Intertrial-interval duration had no effect on choice. In Experiment 3, intertrial-interval duration and whether subjects were given $10 or $10,000 before beginning were varied among four groups in a 2 × 2 design. In all other ways, the procedure was unchanged from Experiment 2. Intertrial interval had no effect on choice, but the $10,000 groups showed less risk aversion than the $10 groups. These results can be explained more readily in terms of Kahneman and Tversky's (1984) notion of “framing of the prospect” than in terms of Rachlin, Logue, Gibbon, and Frankel's (1986) behavioral account of risky choice. 相似文献
109.
Gary M. Pace Brian A. Iwata Glynnis L. Edwards Kay C. McCosh 《Journal of applied behavior analysis》1986,19(4):381-389
We conducted several manipulations of mechanical restraint properties during the course of treatment for two profoundly retarded adolescents who exhibited both self-restraint and self-injurious behavior. In study 1, a combination of prompting, differential reinforcement, and stimulus fading reduced one subject's self-restraint, which consisted of holding rigid tubes on his arms. Subsequently, stimulus control of both self-restraint and self-injurious behavior was transferred to tennis wrist bands. In study 2, a second subject's self-restraint—placing his hands in his pants—was immediately eliminated by the use of air splints. Additionally, differential reinforcement and air-pressure fading resulted in the complete mobility of his arms and a substantial increase in appropriate behaviors. Results of this investigation suggest that stimulus fading and transfer may be valuable components in the elimination of self-restraint. 相似文献
110.
W K Bickel S T Higgins R R Griffiths 《Journal of the experimental analysis of behavior》1989,52(1):47-56
The effects of repeated diazepam administration (80 mg) were assessed across a 12-hr time course with humans responding under a two-component multiple schedule of repeated acquisition and performance of response sequences. Subjects resided in an inpatient clinical research ward for the duration of the study. In each component of the multiple schedule, subjects completed sequences of 10 responses in a predetermined order using three keys of a numeric keypad. In the acquisition component, a new response sequence was to be acquired each session. In the performance component, the response sequence always remained the same. After stable responding was obtained and the effects of the placebo assessed, diazepam was administered for 3 consecutive days. The effects of repeated diazepam administration on overall percentage of errors across the two components of the multiple schedule were selective. In the acquisition component, the first dose of diazepam increased percentage errors with the magnitude of effects decreasing across the second and third days of diazepam administration. In the performance component, the percentage of errors was either minimally affected across all 3 days of diazepam administration or substantively increased on Day 1 with subsequent diazepam administrations having minimal effects. Effects on response rate were not selective. Diazepam decreased rates of responding in both schedule components, with the magnitude of effects decreasing across successive administrations. These results replicate previous findings in humans and nonhumans on the selective effects of diazepam on acquisition versus performance baselines. Also, the results suggest that the selective effects do not result from differences in reinforcement rate. Finally, the present results demonstrate that the selective recovery from repeated drug administration previously demonstrated in nonhumans using a repeated acquisition arrangement has generality to human behavior. 相似文献