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71.
Evans KK Treisman A 《Journal of experimental psychology. Human perception and performance》2005,31(6):1476-1492
Studies have suggested attention-free semantic processing of natural scenes in which concurrent tasks leave category detection unimpaired (e.g., F. Li, R. VanRullen, C. Koch, & P. Perona, 2002). Could this ability reflect detection of disjunctive feature sets rather than high-level binding? Participants detected an animal target in a rapid serial visual presentation (RSVP) sequence and then reported its identity and location. They frequently failed to identify or to localize targets that they had correctly detected, suggesting that detection was based only on partial processing. Detection of targets was considerably worse in sequences that also contained humans, presumably because of shared features. When 2 targets were presented in RSVP, a prolonged attentional blink appeared that was almost eliminated when both targets were detected without being identified. The results suggest rapid feature analysis mediating detection, followed by attention-demanding binding for identification and localization. 相似文献
72.
It is well established that the cerebellum and its associated circuitry are essential for classical conditioning of the eyeblink response and other discrete motor responses (e.g., limb flexion, head turn, etc.) learned with an aversive unconditioned stimulus (US). However, brain mechanisms underlying extinction of these responses are still relatively unclear. Behavioral studies have demonstrated extinction as an active learning process distinct from acquisition. Experimental data in eyeblink conditioning suggest that plastic changes specific to extinction may play an important role in this process. Both cerebellar and hippocampal systems may be involved in extinction of these memories. The nature of this phenomenon and identification of the neural substrates necessary for extinction of originally learned responses is the topic of this review. 相似文献
73.
The present study explores accuracy in estimating blood glucose levels (BGL) in children with type 1 diabetes and analyzes the kinds of symptoms and cues which they use to estimate their BGL. Forty two children with type 1 diabetes completed a SI/IC-3 scale consisting of 28 items (22 symptoms and 6 feelings), indicating those which they perceived at the time and their intensity. They estimated their BGL and gave reasons for their estimation, before having a blood glucose level analysis performed. The results indicated great variability in the accuracy of estimating BGL. They showed failures in the correct discrimination of symptoms of hypoglycemia as well as the presence of false beliefs regarding indicative symptoms of hyperglycemia, and the absence of symptoms as an indicator for euglycemia, beliefs which provoke different and frequent errors in the estimation of BGL. Correct use of external signs is shown to be related to correct estimations of normal BGL, as well as hypoglycemia and hyperglycemia. We discuss the implications these results could have on designing psychological intervention procedures for diabetics in the form of training programs to discriminate BGL accurately, taking into account these findings and previous studies completed in the same field. 相似文献
74.
Seventy-two 2-year-olds participated in a study designed to test two competing accounts of the effect of contextual change on children's ability to learn a word for an object. The mechanistic account hypothesizes that any change in context that highlights a target object will lead to word learning; the social-pragmatic account maintains that a change in context must be perceived as relevant to the speaker's communicative intentions. Consistent with the latter account, we found that children learned the word when a change in context was intentional but not when it was accidental, and children failed to learn the word for the highlighted object when a speaker naive to the preceding context named the object. 相似文献
75.
Prior person perception studies exposednormative expectations about family size such thatvoluntary childfree and single-child women werestigmatized and large-family mothers were glorified. Incontrast, self-reports find no differences in subjectivewell-being among these non-normative and 2 to 3 child,normative women. To explore mostly white,college-educated, employed women's experiences withtheir real-life family size choices, interviews wereconducted with 15 voluntary childfree, 15 one-child, and15 supernormative mothers of 4+ children, and 15normative mothers completed a comparison survey. Quantitative and qualitative analyses revealedpatterns of universal satisfaction, yet stigmatizationacross the three non-normative groups, such as pressurefrom outsiders (including medical professionals) to stay within normative parameters persisted.One-child and supernormative mothers reported thatothers are critical of their child's well-being,intimating selfishness and neglect, respectively. These findings help coalesce the conclusions ofearlier studies. 相似文献
76.
Robert J. Thompson Jr. Kathryn E. Gustafson Karen M. Gil Thomas R. Kinney Alexander Spock 《Journal of clinical psychology in medical settings》1999,6(4):373-392
Objectives: This study has three interrelated objectives: (1) to track the adjustment of children and adolescents with sickle cell disease (SCD) or cystic fibrosis (CF) and their mothers through a third assessment point 2 years after the initial assessment; (2) to determine whether the adaptational processes of the transactional stress and coping model associated with adjustment at the initial assessment continue to be associated with adjustment 2 years later; and (3) to determine whether the pattern of association of adaptational processes with adjustments differs by illness subgroup. Methods: The study samples included 59 children with CF and 50 children with SCD and their mothers. Measures were obtained on maternal adjustment and appraisals of daily and illness stress, coping methods, and family functioning. Child measures included child-reported and mother-reported child adjustment and child perceptions of self-worth and health locus of control and pain coping methods. Results: Consistency in adjustment classification was only 31–32% for child self-report, 66% for mother-reported child behavior problems, and 56–77% for mother self-reported adjustment for the CF and SCD groups, respectively. Support was provided for the association of adaptational processes with maternal adjustment and with the adjustment of children with SCD but not for children with CF. Conclusion: The stability of adjustment has implications for prevention and treatment intervention and subsequent research steps. Intervention efforts should be focused on the relatively small subgroups of children with chronic illnesses and their mothers with consistently poor adjustment. 相似文献
77.
Frank L. Collins Jr Lori A. Pbert Brian Sharp Stanley Smith Karen M. Gil J. Vernon Odom 《Behaviour research and therapy》1988,26(6):461-466
18 myopes and 18 emmetropes were randomly assigned in pairs to either Fading and Feedback training or a no-treatment control condition. The emmetropes were fitted with plus lenses equivalent to the spherical correction of the paired myope to simulate myopic visual acuity. Extensive visual acuity measures were obtained pre- and post-training. Data analyses indicated significant increases in recognition visual acuity for trained subjects, compared to no-treatment controls. The myopia/emmetropia variable did not interact with training even though there were noticably greater increases in visual acuity for trained myopes compared to the other conditions. Resolution visual acuity did not change as a function of training. These data are discussed in terms of their implications for better understanding the mechanisms responsible for visual acuity increases following behavioural training. 相似文献
78.
Frank A. Biafora George J. Warheit Rick S. Zimmerman Andres G. Gil Eleni Apospori Dorothy Taylor William A. Vega 《Journal of applied social psychology》1993,23(11):891-910
While it has been suggested that mistrust of the dominant White society may be an important protective factor for some members of racial minorities, the question of whether mistrust may also be related to nonnormative behaviors among minority members has not been explored. Using survey data from Miami, Florida, this study empirically tests this hypothesis among a sample of African American, Haitian, and other Caribbean island Black adolescent boys. Bivariate analyses suggest a strong relationship between racial mistrust and conventional forms of delinquency for all three ethnic groups. These findings also held in multivariate analyses in which six traditional predictors of deviance were statistically controlled. The authors conclude that racial mistrust adds a new dimension to empirical prediction models. In addition, they conclude that issues associated with racial mistrust should be considered when developing and implementing prevention strategies. 相似文献
79.
80.
John Northup David Wacker Gary Sasso Mark Steege Karla Cigrand Joni Cook Agnes DeRaad 《Journal of applied behavior analysis》1991,24(3):509-522
We conducted a brief functional analysis to identify maintaining variables for aggressive behavior and an alternative replacement response during a 90-min outpatient evaluation of 3 individuals with severe handicaps. During the initial analogue assessment, which focused on identifying maintaining contingencies for aggressive behavior, each participant displayed a substantially greater frequency of aggressive behavior during one condition than during any other. The contingency that produced the highest percentage of aggressive behavior was then presented for the occurrence of a specific alternative behavior (a mand). During this contingency reversal phase, each participant displayed a substantial reduction in aggressive behavior and a substantial increase in alternative behavior, thus providing a direct analysis of the equivalency of the contingency for maintaining either behavior. 相似文献