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191.
David B. Moody William C. Stebbins Carol Iglauer 《Journal of the experimental analysis of behavior》1971,16(1):105-111
Two monkeys were trained to press and hold a response key in the presence of a light and to release it at the onset of a pure tone. Initially, all responses with latencies shorter than 1 sec were reinforced without regard to the frequency of the pure tone, and the intensity of the pure tone that resulted in equal latencies at each frequency was determined. The second stage of the experiment consisted of discrimination training, during which releases to one pure-tone frequency (positive stimulus) were reinforced and releases to a second frequency (negative stimulus) were extinguished. Median latencies to the negative stimulus slowly increased as did the variability of the latency distribution for the negative stimulus. There was no evidence of a concurrent decrease in latencies to the positive stimulus indicative of behavioral contrast. The third part of the experiment consisted of determining maintained generalization gradients by increasing the number of nonreinforcement stimuli. The gradients that eventually resulted showed approximately equal latencies to all frequencies of the negative stimulus and shorter latencies to the positive stimulus frequency. 相似文献
192.
Operant control of response latency in monkeys: evidence for a central explanation 总被引:2,自引:2,他引:0
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Carol A. Saslow 《Journal of the experimental analysis of behavior》1968,11(2):89-98
Two monkeys (M. mulatta) were trained to press a telegraph key after onset of a tone and release it quickly in response to a subsequent light or click stimulus occurring after a variable interval. After training first with a fixed time limit on response latency for key release and then with a continuously adjusting limit, reaction time to click was 160 msec and to light, about 200 msec. Temporal contingencies or "payoff bands" were then introduced which reinforced only responses with latencies which fell between two limits 50 msec apart. Feedback was given as to whether each latency was too slow, within the band, or too fast. A trained monkey could precisely center its latency distribution on any 50 msec-wide payoff band located from 200 to 600 msec after the stimulus, with from 60 to 80% of its responses achieving reinforcement. Distribution statistics were comparable to those of trained human subjects. Because such precise timing might be accomplished by a peripheral adjustment, such as changing the manner of holding the key, latency of electromyographic activation was measured in participating arm muscles in one monkey. Electromyographic activation preceded key release by a constant interval, regardless of response latency, indicating a more central mechanism for timing of brief intervals. 相似文献
193.
Carol Conrad 《Memory & cognition》1974,2(1):130-138
These studies explore the role of context in determining what information about the meanings of words is activated in memory at the time a word is encountered in a sentence. Using a color-naming paradigm, it was shown that both meanings of a word that has two distinct meanings are activated in memory at the time the word is heard in a sentence. This activation occurs even when there is sufficient contextual information to indicate which meaning was intended by the speaker. These results support the hypothesis that there exists in memory an isolable subjective lexicon. They suggest that context which is effective in disambiguating lexical ambiguities in the language has its effect only at a relatively late stage in the cognitive processing involved in language comprehension. 相似文献
194.
People with disabilities rely heavily on specialist agencies to find suitable employment. This research examines how agency consultants use recruitment ads in their work with clients. The authors analyzed the ads collected by consultants and learned that the ads were dominated by organization and job attributes. The ads contained less information about preferred applicant characteristics and selection procedures. Consultants used the ads to facilitate immediate matches between clients and employers, but they also used the ads to nudge clients in new career directions. The results reflect challenges consultants experience in balancing the long‐term needs of clients against the short‐term demands of employers. 相似文献
195.
Pauline Bakibinga Namuunda Mutombo Carol Mukiira Eva Kamande Alex Ezeh Richard Muga 《Journal of religion and health》2016,55(1):192-205
The role of sociocultural factors such as religion and ethnicity in aiding or hampering family planning (FP) uptake in rural Western Kenya, a region with persistently high fertility rates, is not well established. We explored whether attitudes towards FP can be attributed to religious affiliation and/or ethnicity among women in the region. Findings show that religion and ethnicity have no impact; the most significant factors are level of education and knowledge about the benefits of FP for the mother. FP interventions ought to include strategies aimed at enhancing women’s knowledge about the positive impacts of family planning. 相似文献
196.
Anne?C.?FletcherEmail author Carol?A.?Johnston 《Journal of child and family studies》2016,25(10):3150-3159
Children (N = 404) provided data during 3rd and 4th grades concerning their mothers’ use of punitive discipline and yielding to coercion. Teachers provided data regarding their perceptions of children’s externalizing behaviors at school. We tested a cross-lagged model examining parental disciplinary behaviors as predictors of child externalizing behavior, as well as child externalizing behaviors as a predictor of parental disciplinary behaviors. For boys and for girls, there was over-time stability in all three variables of interest. For boys only, more externalizing behaviors in Grade 3 predicted greater use of punitive discipline by parents and more parental yielding to coercion in Grade 4, over and above Grade 3 levels of these parenting variables. The reverse direction of effects was not observed. 相似文献
197.
Martina Zemp Anne Milek E. Mark Cummings Annette Cina Guy Bodenmann 《Journal of child and family studies》2016,25(3):798-810
The significance of enhancing parenting skills to reduce child maladjustment is well-established and supports the important role of evidence-based parenting programs. However, the notion that parenting should be the exclusive focus for enhancing child behavior is necessarily limiting. Evidence is growing that relationship-oriented treatments may be another powerful approach to improve child adjustment, albeit the underlying effects in couple- versus parenting-focused programs have been subject to limited study. The aim of this RCT was to compare the treatment effects of (1) a couple-focused program (the Couples Coping Enhancement Training) to (2) a parenting training (Triple P) and (3) a control group on children’s behavioral problems in 150 couples. The parents’ perceptions of relationship quality, parenting behavior, and child’s behavioral problems were assessed by means of questionnaires completed prior to and 2 weeks after the end of the treatment. Multi-group path analyses revealed that in mothers’ perception the couple-focused program reduced child behavioral problems by enhancing the relationship quality whereas improved parenting mediated the benefits in the parenting training. In fathers’ evaluations the couple-focused program reduced dysfunctional parenting which largely accounted for the benefits in child adjustment. The dearth of research on child outcomes in couple-focused intervention studies is a striking gap that should be overcome. It is a promising field because of its evident potential to foster the health of many children. 相似文献
198.
For this project, we analyzed in-depth life history materials from interviews with twelve former self-injurers. Eschewing a medical/psychological approach to self-injury, our primary goal was to discover how study participants used the discourse of self-injury as a narrative resource to construct their identity. Our study participants drew on pathology exemplars and alternative frames to make sense of their lives and selves. In this article, the lines between so-called self-injury and other socially sanctioned behaviors became blurred. We call for an approach to the topic that is more consciously aware of the socially constructed nature of the phenomenon. 相似文献
199.
Carol Opdebeeck Anthony Martyr 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2016,23(1):40-60
The associations between proxy measures of cognitive reserve (CR) and cognition vary across studies and cognitive domains. This meta-analysis aimed to assess the relationship between CR and cognition in multiple domains (memory, executive function, visuospatial ability, and language). CR was considered in terms of three key proxy measures – educational level, occupational status, and engagement in cognitively stimulating activities – individually and in combination. One-hundred and thirty-five studies representing 128,328 participants were included. Of these, 109 used a measure of education, 19 used a measure of occupation, 31 used a measure of participation in cognitively stimulating activities, and 6 used a combination of these. All three proxy measures had a modest positive association with cognition; occupational status and cognitive activities showed the most variation across cognitive domains. This supports the view that the commonly used proxy measures of CR share an underlying process but that each additionally provides a unique contribution to CR. 相似文献
200.
Faking revisited: Exerting strategic control over performance on the Implicit Relational Assessment Procedure
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Sean Hughes Ian Hussey Bethany Corrigan Katie Jolie Carol Murphy Dermot Barnes‐Holmes 《European journal of social psychology》2016,46(5):632-648
Across four studies, we demonstrate that effects obtained from the Implicit Relational Assessment Procedure, like those obtained from other indirect procedures, are not impervious to strategic manipulation. In experiment 1, we found that merely informing participants to “fake” their performance without providing a concrete strategy to do so did not eliminate, reverse, or in any way alter the obtained outcomes. However, when those same instructions orientated attention toward the core parameters of the task, participants spontaneously derived a strategy that allowed them to eliminate their effects (experiment 2). When the participants were provided with a viable response strategy, they successfully reversed the direction of their overall Implicit Relational Assessment Procedure effect (experiment 3). By refining the nature of those instructions, we managed to target and alter individual trial‐type effects in isolation with some success (experiment 4). 相似文献