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321.
Three hypotheses--the bound-change hypothesis, drift-rate-change hypothesis, and two-stage-processing hypothesis--are proposed to account for data from a perceptual discrimination task in which three different response deadlines were involved and three different payoffs were presented prior to each individual trial. The aim of the present research was to show (1) how the three different hypotheses incorporate response biases into a sequential sampling decision process, (2) how payoffs and deadlines affect choice probabilities, and (3) the hypotheses' predictions of response times and choice probabilities. The two-stage-processing hypothesis gave the best account, especially for the choice probabilities, whereas the drift-rate-change hypothesis had problems predicting choice probabilities as a function of deadlines. 相似文献
322.
Lupfer G Frieman J Coonfield D 《Journal of comparative psychology (Washington, D.C. : 1983)》2003,117(4):449-455
Golden hamsters (Mesocricetus auratus) and dwarf hamsters (Phodopus campbelli) interacted with a conspecific demonstrator that had recently consumed a flavored food. When given a choice between their demonstrator's flavor and another flavor, the dwarf hamsters preferred the flavor their demonstrator had eaten. Golden hamsters did not prefer their demonstrators' diets when the demonstrators were unrelated adults or littermates, but they did when the demonstrator was their mother. Videotaping the interactions between demonstrators and observers revealed that adult golden hamsters did not investigate foods hoarded by their demonstrators whereas dwarf hamsters did. These results are interpreted in terms of the stimuli that activate feeding behavior systems in these 2 hamster species. 相似文献
323.
Wakefield JC 《Journal of personality disorders》2006,20(2):157-69; discussion 181-5
The DSM's general criteria for personality disorder (PD) attempt to define PD versus nondisordered personality conditions. If dimensionalization of PD occurs in the DSM-V (perhaps, it is suggested, with PD diagnosis moved to Axis I and overall personality assessment in Axis II, thus separating diagnosis from case formulation), general criteria likely will still be needed to prevent massive false positives. In this article, one of the general criteria, the cultural deviance requirement (CDR), is examined from the perspective of the evolution-based harmful-dysfunction analysis of disorder. The CDR is often assumed to express value relativity of harm in diagnosis, but cultural values are a designed feature of human social functioning that influence personality formation. The CDR is thus argued to be an indicator of whether an individual's personality organization is due to an evolutionary dysfunction. Value relativity and evolutionary analysis thus converge. 相似文献
324.
The present study examined basic assumptions embedded in learning models for predicting behavior in decisions based on experience.
In such decisions, the probabilities and payoffs are initially unknown and are learned from repeated choice with payoff feedback.
We examined combinations of two rules for updating past experience with new payoff feedback and of two choice rule assumptions
for mapping experience onto choices. The combination of these assumptions produced four classes of models that were systematically
compared. Two methods were employed to evaluate the success of learning models for approximating players’ choices: One was
based on estimating parameters from each person’s data to maximize the prediction of choices one step ahead, conditioned by
the observed past history of feedback. The second was based on making a priori predictions for the entire sequence of choices
using parameters estimated from a separate experiment. The results indicated the advantage of a class of models incorporating
decay of previous experience, whereas the ranking of choice rules depended on the evaluation method used. 相似文献
325.
Laboratory rats show a positive response to low- and nonstressful novel events. The novel event may involve a number of aspects of the stimulus field. It is usually associated with a change in amount of environmental complexity. Most studies concerning novelty-related behavior involve the introduction of novel objects or the rearrangement of familiar objects. The present purpose was to measure exploratory behavior in response to environments of increased and decreased complexity. Both directions of environmental change are conditions of novelty. A two-way manipulation of increasing and decreasing the complexity of the environment was used. Rats of both sexes showed increased exploration to exposure to novelty, no matter which manipulation was applied; however, female and male rats behaved differently to the two types of novelty. Males responded more to novelty from the introduction of an unfamiliar object. The results indicate novel stimulation, whether of increasing or decreasing complexity, has reward properties. Perhaps the male-specific behavior directed toward unfamiliar objects may serve an adaptive function. 相似文献
326.
The effectiveness of an ecologically oriented approach in changing the self-concepts of 80 high-risk adolescents was investigated. Participants were administered a self-esteem scale before and after an eight-week psychoeducational program designed for dropout prevention. Results indicated significant reductions in dropout rates and increased self-esteem among participants. 相似文献
327.
When we read that two protagonists in a story chatted together for a couple of minutes, do we draw inferences about the topic of the conversation on the basis of information presented earlier in the text? Participants read passages in which protagonists part and later reunite; the passages ended with a sentence either that implied conversation or did not. In Experiment 1, participants' continuation sentences indicated that inferences about the topic of conversation were drawn. Recognition probe data in Experiment 2 provided more immediate evidence of such inferences. Experiment 3 addressed a possible confound in Experiment 2 and again provided evidence that readers inferred the continuation of the conversation. In Experiments 4 and 5, we investigated the effect of having the targeted conversational topic be a secret that should not be shared between the protagonists. The results are discussed in terms of the collaboration between passive, memory-based text processing and schema-driven comprehension processes. 相似文献
328.
329.
Jerome LW DeLeon PH James LC Folen R Earles J Gedney JJ 《The American psychologist》2000,55(4):407-421
Rapid and far-reaching technological advances are revolutionizing the ways in which people relate, communicate, and live their daily lives. Technologies that were hardly used a few years ago, such as the Internet, e-mail, and video teleconferencing, are becoming familiar methods for modern communication. Telecommunications will continue to evolve quickly, spawning telehealth applications for research and the provision of clinical care in communities, university settings, clinics, and medical facilities. The impact on psychology will be significant. This article examines the application of developing technologies as they relate to psychology and discusses implications for professional research and practice. 相似文献
330.