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71.
Under natural conditions, human beings routinely have to choose among multiple alternatives which are associated with specific outcomes of varying desirability. Typically, decisions are based upon the processing of perceptual input, which introduces additional noise to the system. Bayesian decision theory (BDT) allows us to formalize decision under risk and to predict statistically optimal choice behavior. In the present study, human observers performed a classification task characterized by an extensive amount of perceptual uncertainty (auditory localization). In addition, a spatial reward function was imposed on the task. We set up a BDT model with no free parameters to serve as a benchmark for statistically optimal choices, and tested it against a purely perceptual model and a hybrid, heuristic model. In addition, we tested these three models with free rather than fixed parameters for the perceptual uncertainty and the peak of the reward function. The log likelihoods of the models given the empirical data were determined by means of Monte Carlo simulations. Bayesian model comparison (BMC) revealed that the BDT model with two free parameters was the most plausible among the tested models. The fitted parameter values for the peak of the reward function were consistently smaller than the actual peak reward communicated to the participants. The results are discussed in the context of an internal underweighting of the reward function. 相似文献
72.
Although computer keyboards and mice are frequently used in measuring response times (RTs), the accuracy of these measurements
is quite low. Specialized RT collection devices must be used to obtain more accurate measurements. However, all the existing
devices have some shortcomings. We have developed and implemented a new, commercially available device, the RTbox, for highly
accurate RT measurements. The RTbox has its own microprocessor and high-resolution clock. It can record the identities and
timing of button events with high accuracy, unaffected by potential timing uncertainty or biases during data transmission
and processing in the host computer. It stores button events until the host computer chooses to retrieve them. The asynchronous
storage greatly simplifies the design of user programs. The RTbox can also receive and record external signals as triggers
and can measure RTs with respect to external events. The internal clock of the RTbox can be synchronized with the computer
clock, so the device can be used without external triggers. A simple USB connection is sufficient to integrate the RTbox with
any standard computer and operating system. 相似文献
73.
Fific M Nosofsky RM Townsend JT 《Journal of experimental psychology. Human perception and performance》2008,34(2):356-375
A growing methodology, known as the systems factorial technology (SFT), is being developed to diagnose the types of information-processing architectures (serial, parallel, or coactive) and stopping rules (exhaustive or self-terminating) that operate in tasks of multidimensional perception. Whereas most previous applications of SFT have been in domains of simple detection and visual-memory search, this research extends the applications to foundational issues in multidimensional classification. Experiments are conducted in which subjects are required to classify objects into a conjunctive-rule category structure. In one case the stimuli vary along highly separable dimensions, whereas in another case they vary along integral dimensions. For the separable-dimension stimuli, the SFT methodology revealed a serial or parallel architecture with an exhaustive stopping rule. By contrast, for the integral-dimension stimuli, the SFT methodology provided clear evidence of coactivation. The research provides a validation of the SFT in the domain of classification and adds to the list of converging operations for distinguishing between separable-dimension and integral-dimension interactions. 相似文献
74.
Gillath O Mikulincer M Birnbaum GE Shaver PR 《Personality & social psychology bulletin》2008,34(8):1057-1069
The studies reported here provide, for the first time, experimental evidence to support the claim that sexual interest and arousal are associated with motives to form and maintain a close relationship. In five studies, sex-related representations were cognitively primed, either subliminally or supraliminally, by exposing participants to erotic words or pictures as compared with neutral words or pictures. The effects of "sexual priming" on the tendencies to initiate and maintain a close relationship were assessed using various cognitive-behavioral and self-report measures. Supporting the hypotheses, subliminal but not supraliminal exposure to sexual primes increased (a) willingness to self-disclose, (b) accessibility of intimacy-related thoughts, (c) willingness to sacrifice for one's partner, and (d) preference for using positive conflict-resolution strategies. The article discusses implications of these findings for the role of sex in close relationships and offers a conceptualization of possible relational motives of the sexual behavioral system. 相似文献
75.
We review theory and research concerning the relation between attachment style, measured in terms of the two dimensions of insecurity (attachment anxiety and avoidance) and emotions that arise in response to threats and dangers, relationship separations and losses, interpersonal offenses and transgressions, and positive personal and interpersonal events. The review indicates that attachment theory systematically organizes research findings associated with emotional appraisals, feelings, and expressions. 相似文献
76.
Lauren Humphreys Mario Cappelli Ethel Aronovitch Judith Allanson Alasdair G. W. Hunter 《Journal of applied social psychology》2008,38(2):482-512
This study explored how aspects of the couple relationship contributed to the adjustment of 95 women who underwent prenatal diagnostic (PND) testing because of advanced maternal age (AMA). Participants completed self‐report measures prior to genetic counseling (T1), during the waiting period for PND test results (T2), and after normal results were received (T3). At T2, distress was predicted by the degree to which women approached the PND decision jointly with their partners, and marital adjustment was predicted by women's satisfaction with the support received from their partners. Marital adjustment at T3 was predicted by earlier levels of partner agreement about PND‐related issues. Results suggest that the couple relationship has the potential to facilitate or hinder women's experience of PND testing. 相似文献
77.
As courts often rely on clinicians when differentiating between sexually abusive youth at a low versus high risk of reoffense, understanding factors that contribute to accuracy in assessment of risk is imperative. The present study built on existing research by examining (1) the accuracy of clinical judgments of risk made after completing risk assessment instruments, (2) whether instrument-informed clinical judgments made with a high degree of confidence are associated with greater accuracy, and (3) the risk assessment instruments and subscales most predictive of clinical judgments. Raters assessed each youth's (n = 166) risk of reoffending after completing the SAVRY and J-SOAP-II. Raters were not able to predict detected cases of either sexual recidivism or nonsexual violent recidivism above chance, and a high degree of rater confidence was not associated with higher levels of accuracy. Total scores on the J-SOAP-II were predictive of instrument-informed clinical judgments of sexual risk, and total scores on the SAVRY of nonsexual risk. 相似文献
78.
Corcos M Loas G Speranza M Perez-Diaz F Stephan P Verrier A Lang F Nezelof S Bizouard P Venisse JL Jeammet P 《Psychological reports》2008,102(2):435-449
Many common risk factors have been described in addictive disorders. Little is known about factors' respective contributions to discrimination of addicted and nonaddicted participants. Two large samples were compared including 513 nonpsychiatric participants and 374 addicted participants meeting the DSM-IV criteria for eating disorders, alcohol, or substance dependence. Twenty-six risk factors were assessed by interview or self-rating scales. A discriminant analysis determined the respective weight of each risk factor. One discriminant function emerged and characterized a depressive dimension. The results suggest that the different risk factors described in addiction could be related to a depressive dimension. 相似文献
79.
Mario A. Maggi 《Journal of mathematical psychology》2006,50(4):426-430
We prove that, in cumulative prospect theory, the weak loss aversion for S-shaped value functions is equivalent to a notion of risk aversion that we define from the perceptual point of view. No additional assumption or condition on the probability distortion is needed. It is demonstrated that a power S-shaped value function does not satisfy weak loss aversion, i.e., a decision maker is risk seeking with respect to some mixed sign lotteries. 相似文献
80.