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71.
The duration or magnitude of reinforcement has varied and often appears to have been selected arbitrarily in functional analysis research. Few studies have evaluated the effects of reinforcement magnitude on problem behavior, even though basic findings indicate that this parameter may affect response rates during functional analyses. In the current study, 6 children with autism or developmental disabilities who engaged in severe problem behavior were exposed to three separate functional analyses, each of which varied in reinforcement magnitude. Results of these functional analyses were compared to determine if a particular reinforcement magnitude was associated with the most conclusive outcomes. In most cases, the same conclusion about the functions of problem behavior was drawn regardless of the reinforcement magnitude. 相似文献
72.
Roncesvalles MN Schmitz C Zedka M Assaiante C Woollacott M 《Journal of motor behavior》2005,37(5):404-416
The authors investigated the emergence of independent control of body segments in bimanual tasks involving either voluntary or involuntary trunk motion by tracking the transition from an ego- to an exocentric mode of postural control during childhood (i.e., from body-referenced orientation to externally referenced action). A paradigm combining a seated manual task and various trunk manipulations described the coordination strategies used by 24 children at different ages (2 to 9 years) and by adults. The following questions were asked: (a) When do children begin to dissociate upper limb movements from those of the trunk? (b) What segmental strategies are exhibited by each age group (2-3, 4-6, and 7-9 years, and adults)? Kinematic analyses revealed that younger children (2-6 years) used either the trunk or the support surface as reference to orient the limbs. Older children (7-9 years) began to use a gravitational reference frame similar to that of adults; they uncoupled upper limb motion from the trunk in either voluntary or imposed conditions. Young children patterned the forearm trajectory after the initiating segment (support surface or the trunk), thus reducing the degrees of freedom during the dual task. Echoing previous reports, 7-9 years of age appears to be a critical period in which children master postural control and develop an internal representation of body scheme. 相似文献
73.
Martins Y Preti G Crabtree CR Runyan T Vainius AA Wysocki CJ 《Psychological science》2005,16(9):694-701
Human body odor may contribute to selection of partners. If so, sexual orientation may influence preference for and perhaps production of human body odors. In a test of these hypotheses, heterosexual and homosexual males and females made two-alternative forced-choice preference judgments for body odors obtained from other heterosexual and homosexual males and females. Subjects chose between odors from (a) heterosexual males and gay males, (b) heterosexual males and heterosexual females, (c) heterosexual females and lesbians, and (d) gay males and lesbians. Results indicate that differences in body odor are detected and responded to on the basis of, in part, an individual's gender and sexual orientation. Possible mechanisms underlying these findings are discussed. 相似文献
74.
Creswell JD Welch WT Taylor SE Sherman DK Gruenewald TL Mann T 《Psychological science》2005,16(11):846-851
Stress is implicated in the development and progression of a broad array of mental and physical health disorders. Theory and research on the self suggest that self-affirming activities may buffer these adverse effects. This study experimentally investigated whether affirmations of personal values attenuate physiological and psychological stress responses. Eighty-five participants completed either a value-affirmation task or a control task prior to participating in a laboratory stress challenge. Participants who affirmed their values had significantly lower cortisol responses to stress, compared with control participants. Dispositional self-resources (e.g., trait self-esteem and optimism) moderated the relation between value affirmation and psychological stress responses, such that participants who had high self-resources and had affirmed personal values reported the least stress. These findings suggest that reflecting on personal values can keep neuroendocrine and psychological responses to stress at low levels. Implications for research on the self, stress processes, health, and interventions are discussed. 相似文献
75.
76.
One measure of the impact of genetic counseling and testing (GCT) is the extent to which it fosters behavioral change that is consistent with mutation status. We describe and illustrate how two different signal detection methods, receiver operating characteristic (ROC) analysis and recursive partitioning, can be used in this context to evaluate the impact of GCT. We analyzed real screening behavior data obtained in the 12 months following GCT for Hereditary Nonpolyposis Colon Cancer (HNPCC) using these two different signal detection approaches. Each approach demonstrated that GCT had an impact on behavioral outcomes, and was effective in fostering behavioral outcomes appropriate to mutation status. The ROC approach demonstrated that GCT was effective because mutation positive and mutation negative individuals could be distinguished on the basis of the number of recommended screening behaviors. The recursive partitioning approach demonstrated that GCT was effective because there were generally high rates of adherence to screening guidelines among subjects. The recursive partitioning technique also identified four subgroups of subjects, each with distinct characteristics, for which tailored interventions could be developed to increase rates of adherence to screening guidelines. Signal detection methods are easily implemented and are useful techniques for evaluating the impact of GCT. 相似文献
77.
This study examines the predictive validity of several clinical variables--including marital distress, individual symptomatology, and family-of-origin experiences--on the formation of the alliance in couple therapy. Eighty people who were treated with a naturalistic course of integrative conjoint psychotherapy at a large midwestern outpatient clinic were assessed on the clinical variables before session 1. They also completed ratings of the therapeutic alliance after sessions 1 and 8. Individual symptomatology did not predict alliance formation at either treatment stage. Higher levels of marital distress predicted poorer alliances to treatment between partners at session 1. Marital distress also predicted therapeutic alliance quality for men and women at session 8. Family-of-origin distress predicted alliance quality for men at session 1, and for women at session 8. Family-of-origin distress for men and women predicted split alliances early in treatment, and marital distress predicted split alliances for women at session 8. Clinical implications for the assessment and treatment of couples are discussed. 相似文献
78.
Educational interventions based on the principles of behavior analysis are highly effective for establishing skills in young children with autism. As a first step in program development, the child's current skill level is determined by evaluating performance on tasks drawn from a preestablished curriculum. However, few specific guidelines have been delineated for conducting these skills assessments or interpreting the results. In this study, we evaluated an efficient methodology for conducting skills assessments. Six children who had been diagnosed with autism participated. The relative efficacy of two assessment packages--one containing several reinforcement procedures and one containing several potentially effective prompts--was evaluated across two to three skills for each child using multiple baseline and reversal designs. Results suggested that the methodology was useful for matching targeted skills to appropriate interventions. 相似文献
79.
Mann MA 《American journal of psychoanalysis》2004,64(2):143-153
This article examines different experiences of immigrant parents and their children in transit between the parents' ethnic world and American culture through three clinical cases: a 16-year-old male, whose mother is Persian and father East Indian and who presents with depression and lack of focus; an 18-year-old girl, whose mother is Nigerian and father African American and who was reporting depressive symptoms and confusion about sexual identity; and an 18-year-old depressed male from an Assyrian Iraqi background whose parents both are from Northern Iraq, but have lived in the United States for 20 years. Adolescents of immigrant families have much more complicated tasks during this phase of their development to establish a future sense of self-identity. A well-consolidated sense of self-identity is more complicated for these types of multiethnic immigrant families. The adolescents must rely on parental ego functions and their coherent sense of identity to weather this stage of their turbulent experience. In their strong fantasy framework, these adolescents strive to belong to their new peer groups, in which parents do not belong, particularly when the immigrant parents present a variety of different social and cultural values discordant to the contemporary culture. The cases suggest that both positive and negative aspects of ethnic identification become diluted during adolescence, when identification with parental mores occurs. 相似文献
80.
Two experiments investigate whether relations that link the constituents of compounds during compound formation (e.g., teapot is formed by combining tea and pot using the relation head noun FOR modifier) also influence the processing of familiar compounds. Although there is evidence for the use of such relations in forming compounds, whether such relations affect the processing of familiar compounds is unknown. The data show clear effects of repetition and relational priming for written words on both a sense-nonsense task and a lexical decision task. These results indicate that the relation linking the constituents of familiar compounds is important to their access and use. 相似文献