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221.
David R. Thomas Melissa Lusky Spencer Morrison 《Attention, perception & psychophysics》1992,51(6):529-540
Six experiments were carried out to compare go/no-go and choice paradigms for studying the effects of intradimensional discrimination training on subsequent measures of stimulus generalization in human subjects. Specifically, the purpose was to compare the two paradigms as means of investigating generalization gradient forms and frame of reference effects. In Experiment 1, the stimulus dimension was visual intensity (brightness); in Experiment 2, it was line orientation (line-angle stimuli). After learning to respond (or to respond “right”) to stimulus value (SV) 4 and not to respond (or to respond “left”) to SV2 (in Experiment 1) or SV1 (in Experiment 2), the subjects were tested for generalization (recognition) with an asymmetrical set of values ranging from SV1 to SV11. Go/no-go training produced peaked gradients, whereas choice training produced sigmoid gradients. The asymmetrical testing resulted in a gradual shift of the peak of responding (go/no-go group) or in the point of subjective indifference (PSI; choice group) toward. the central value of the test series; thus, both paradigms revealed a frame of reference effect. The results were comparable for the quantitative (intensity) and the qualitative (line-angle) stimulus dimensions. Experiment 3 compared the go/no-go procedure with a yes/no procedure in which subjects responded “right” to SV4 and “left” to all other intensities and found no differences between these procedures. Thus the difference in gradient forms in go/no as opposed to (traditional) choice paradigms depends on whether one or two target stimuli are used in training. In Experiment 4, in which visual intensity was used, the shift in the PSI following choice training varied positively with the range of asymmetrical test stimuli employed. In Experiment 5, also with visual intensity, the magnitude of the peak shift following go/no-go training varied as a function of over representing a high or a low stimulus value during generalization testing. Experiment 6, with line angles, showed that the PSI following choice training varies in a similar way. The frame of reference effects obtained in these experiments are consistent with an adaptation-level model. 相似文献
222.
Relationships among competition, athletic skill, and social relationships among children have received considerable attention from social psychologists and have also sparked considerable public debate. Most studies of these relationships have concentrated on sports programs involving upper elementary or older boys. This field work study examined these relationships in three after-school recreation programs for children ages 5 to 8. Although all programs professed to stress skills development over competition, teams act varied substantially in competitive climates. Competitive environments heightened the tendency for athletic skill to function as a generalized status element in peer networks. After-school sports programs contributed to the reproduction of athletic skill as a basis of peer status, even for young children. 相似文献
223.
Melissa J. Shirley Brian A. Iwata SungWoo Kahng Jodi L. Mazaleski Dorothea C. Lerman 《Journal of applied behavior analysis》1997,30(1):93-104
We examined the effectiveness of functional communication training (FCT) in reducing self-injurious behavior (SIB) and in shaping an alternative (communicative) response while SIB continued to be reinforced. Following a functional analysis of 3 individuals' SIB, we attempted to teach an alternative response consisting of a manual sign to each individual, using the reinforcer that maintained SIB. When FCT was implemented without extinction, SIB remained at baseline rates for all participants, and none of the participants acquired the alternative response. When extinction was added to the training procedure, SIB decreased and manual signing increased for all participants. To determine if signing, when established, would compete with SIB when both were reinforced, extinction was then withdrawn. Signing was maintained and SIB occurred at low rates for 2 individuals, but SIB returned to baseline rates for the 3rd individual, necessitating the reimplementation of extinction. These results suggest that it may be difficult to establish alternative behaviors if inappropriate behavior continues to be reinforced, but that, when established, alternative behavior might compete successfully with ongoing contingencies of reinforcement for inappropriate behavior. 相似文献
224.
John Northup Kevin Jones Carmen Broussard Gina DiGiovanni Melissa Herring Iantha Fusilier Alicia Hanchey 《Journal of applied behavior analysis》1997,30(1):121-125
To assess the drug—behavior interaction effects with an 8-year-old boy with attention deficit hyperactivity disorder, common classroom antecedent (e.g., seating arrangement) and consequent (e.g., peer prompts) stimuli were alternated within a school day while drug conditions (methylphenidate vs. placebo) were alternated across days. The results suggested that peer attention maintained disruptive behavior when methylphenidate was absent but not when it was present. 相似文献
225.
The functions associated with attitudes toward gays in the military were investigated. In Study I, secondary analyses of data compiled by the Gallup Organization indicated that ego-defensive and value-expressive functions are associated with attitudes toward lifting the ban on homosexuals in the military. In Study 2, results from a questionnaire specifically designed to assess reasons to lift or keep the ban replicated the findings of Study 1. In addition, Study 2 indicated that the functions both uniquely contribute to the prediction of attitudinal stance. Results from both studies indicated that approval of lifting the ban was associated with the endorsement of value-expressive reasons to lift the ban and the rejection of ego-defensive and value-expressive reasons to keep the ban; by contrast, disapproval of lifting the ban was associated with the endorsement of ego-defensive and value-expressive reasons to keep the ban and the rejection of value-expressive reasons to lift the ban. Results are discussed in terms of the implications for the functional approach to attitudes and persuasion. 相似文献
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227.
Speakers' assumptions about the lexical flexibility of idioms 总被引:1,自引:0,他引:1
Raymond W. Gibbs Nandini P. Nayak John L. Bolton Melissa E. Keppel 《Memory & cognition》1989,17(1):58-68
In three experiments, we examined why some idioms can be lexically altered and still retain their figurative meanings (e.g., John buttoned his lips about Mary can be changed into John fastened his lips about Mary and still mean "John didn't say anything about Mary"), whereas other idioms cannot be lexically altered without losing their figurative meanings (e.g., John kicked the bucket, meaning "John died," loses its idiomatic meaning when changed into John kicked the pail). Our hypothesis was that the lexical flexibility of idioms is determined by speakers' assumptions about the ways in which parts of idioms contribute to their figurative interpretations as a whole. The results of the three experiments indicated that idioms whose individual semantic components contribute to their overall figurative meanings (e.g., go out on a limb) were judged as less disrupted by changes in their lexical items (e.g., go out on a branch) than were nondecomposable idioms (e.g., kick the bucket) when their individual words were altered (e.g., punt the pail). These findings lend support to the idea that both the syntactic productivity and the lexical makeup of idioms are matters of degree, depending on the idioms' compositional properties. This conclusion suggests that idioms do not form a unique class of linguistic items, but share many of the properties of more literal language. 相似文献
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230.
Deborah Gross Harolyn M. E. Belcher Chakra Budhathoki Mirian E. Ofonedu Melissa K. Uveges 《Journal of child and family studies》2018,27(5):1579-1593
We examined whether parent engagement in parent training (PT) differed based on PT format (parent group-based with video versus mastery-based individual coaching with child) in an economically disadvantaged sample of families seeking behavioral treatment for their preschool children in an urban mental health clinic. Parents (N?=?159; 76.1% mothers, 69.8% African American, 73% low-income) were randomized to one of two interventions, Chicago Parent Program (parent group?+?video; CPP) or Parent–Child Interaction Therapy (individualized mastery-based coaching; PCIT). Parent engagement indicators compared were PT attendance and completion rates, participation quality, and parent satisfaction. Risk factors predictive of PT attrition (parent depression, psychosocial adversity, child behavior problem severity, length of wait time to start PT) were also compared to determine whether they were more likely to affect engagement in one PT format versus the other. No significant differences were found in PT attendance or completion rates by format. Clinicians rated parents’ engagement higher in PCIT than in CPP while satisfaction with PT was rated higher by parents in CPP compared to PCIT. Never attending PT was associated with more psychosocial adversity and externalizing behavior problems for CPP and with higher baseline depression for PCIT. Parents with more psychosocial adversities and higher baseline depression were less likely to complete PCIT. None of the risk factors differentiated CPP completers from non-completers. Delay to treatment start was longer for PCIT than CPP. Strengths and limitations of each PT format are discussed as they relate to the needs and realities of families living in urban poverty. 相似文献