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461.
Mice from replicate lines, selectively bred based on high daily wheel-running rates, run more total revolutions and at higher average speeds than do mice from nonselected control lines. Based on this difference it was assumed that selected mice would find the opportunity to run in a wheel a more efficacious consequence. To assess this assumption within an operant paradigm, mice must be trained to make a response to produce the opportunity to run as a consequence. In the present study an autoshaping procedure was used to compare the acquisition of lever pressing reinforced by the opportunity to run for a brief opportunity (i.e., 90 s) between selected and control mice and then, using an operant procedure, the effect of the duration of the opportunity to run on lever pressing was assessed by varying reinforcer duration over values of 90 s, 30 min, and 90 s. The reinforcement schedule was a ratio schedule (FR 1 or VR 3). Results from the autoshaping phase showed that more control mice met a criterion of responses on 50% of trials. During the operant phase, when reinforcer duration was 90 s, almost all control, but few selected mice completed a session of 20 reinforcers; however, when reinforcer duration was increased to 30 min almost all selected and control mice completed a session of 20 reinforcers. Taken together, these results suggest that selective breeding based on wheel-running rates over 24 hr may have altered the motivational system in a way that reduces the reinforcing value of shorter running durations. The implications of this finding for these mice as a model for attention deficit hyperactivity disorder (ADHD) are discussed. It also is proposed that there may be an inherent trade-off in the motivational system for activities of short versus long duration. 相似文献
462.
Theodore Gracyk 《Philosophy Compass》2007,2(3):380-395
Philosophy of art presupposes differences between art and other cultural activity. Philosophers have recently paid more attention to this excluded activity, particularly to the range of cultural production known as popular art. Three issues have dominated these discussions. First, there is debate about the basis of the distinction. Some philosophers contend that fine art is essentially different from popular art, but others hold that the distinction is entirely social in origin. Second, philosophers disagree on the degree of continuity or discontinuity that holds between fine and popular art. Third, there is controversy about the relative value of the two, and about the basis for the supposed superiority of fine art. 相似文献
463.
William Ming Liu Geoffrey Soleck Joshua Hopps Kwesi Dunston Theodore Pickett 《Journal of multicultural counseling and development》2004,32(2):95-122
Because social class and classism remain elusive constructs in psychology, this 2‐part article first lays the foundation for the Social Class Worldview Model and then the Modern Classism Theory. A case example is used for illustration. The authors also provide counseling applications and recommendations for future research. Debido a que la clase social y el clasismo continuan siendo unos conceptos evasivos en la psicología, este artículo de 2 partes establece una fundación para el Modelo de Cosmovisión de Clase Social y la Teoría Moderna del Clasismo. Se utiliza un caso de ejemplo para su ilustración. Los autores también proporcionan aplicaciones para la consejería y recomendaciones para investigaciónes futuras. 相似文献
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465.
Nico Trocmé Barbara Fallon Vandna Sinha Melissa Van Wert Anna Kozlowski Bruce MacLaurin 《International journal of psychology》2013,48(2):128-140
Rates of reported child maltreatment nearly doubled in Canada over the period 1998–2003, an increase that reflects growing awareness of the harmful effects of an expanding array of parental behaviors, including corporal punishment, lack of supervision, and exposure to intimate partner violence (IPV). Some of these situations may benefit from voluntary family support programs outside of the child welfare system. Analyzing a sample of 11,807 investigations, this paper compares cases where the sole concern is exposure to IPV, or hitting a child, or neglect, or other forms of investigated maltreatment. Situations where exposure to IPV or potentially abusive hitting were the sole reason for investigation presented with fewer risk factors and were less likely to lead to ongoing child welfare interventions compared to other maltreatment investigations. While situations involving alleged neglect presented a higher risk profile and elicited a more intensive child welfare response than did exposure to IPV or hitting, opportunities for alternative services were nevertheless identified. The study also found that visible minority families were overrepresented in cases involving hitting and that Aboriginal families were overrepresented in cases involving neglect. Overall the findings support the development of alternative response programs in Canada. 相似文献
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467.
The central hypothesis of Semantic Network Model of Creativity is that creative people, who are exposed to more information that are both novel and useful, will have more interconnections between event schemas in their associations. The networks of event schemas in creative people’s minds were expected to be wider and denser than those in less creative people’s minds. Based on this theory, data from Chinese online social media, also known as “Weibo microblogging,” were analyzed. Each user’s score consisted of the metric of coverage, which represented the spread of the network, as well as the metric of density, which represented the interconnections among nodes in the network. The results showed that occupations had a significant effect on people’s creativity score. Academic scholars and writers in general had higher scores compared to other groups, such as entertainment celebrities and sport stars. The implications and limitations of this method of quantifying people’s creativity were discussed. 相似文献
468.
Michael D. Anestis PhD Fallon B. Moberg Randolph C. Arnau PhD 《Suicide & life-threatening behavior》2014,44(2):175-187
The interpersonal‐psychological theory of suicidal behavior (IPTS; Joiner, 2005) posits that suicidal behavior occurs when an individual has a desire for death (due to the combination of perceived burdensomeness and thwarted belongingness) in addition to an acquired capacity for suicide, which is present when the individual has a low fear of death and high pain tolerance. Previous research has demonstrated an expected negative relation between trait hope and perceived burdensomeness and thwarted belongingness, as well as a more perplexing finding that hope is positively associated with the acquired capability. In a sample of 230 college students, measures of the three components of the IPTS were administered, along with measures of hope, depression, and painful and/or provocative events. Hierarchical regression analyses replicated the previously found associations between hope and burdensomeness and belongingness while controlling for depression and demographic variables. The positive association between hope and acquired capacity was also replicated, but a mediation analysis demonstrated that the effect was statistically accounted for by distress tolerance. The results further support the incremental validity of hope as a consideration in suicide risk assessments and suggest that hope may serve as a protective factor with respect to suicidal desire. 相似文献
469.
470.
Theodore Fallon Jr. M.D. M.P.H. Andres Pumariega M.D. Wesley Sowers M.D. Robert Klaehn M.D. Charles Huffine M.D. Thomas Vaughan Jr. M.D. Nancy Winters M.D. Mark Chenven M.D. Larry Marx M.D. Albert Zachik M.D. William Heffron M.D. Katherine Grimes M.D. M.P.H. 《Journal of child and family studies》2006,15(2):140-152
The Child and Adolescent Level of Care System/Child and Adolescent Service Intensity Instrument (CALOCUS/ CASII) is designed to help determine the intensity of services needed for a child served in a mental health system of care. The instrument contains eight dimensions that are rated following a comprehensive clinical evaluation. The dimensions are risk of harm, functionality, co-morbidity (psychiatric, substance abuse, development disability and medical), environmental stressors, environmental supports, the child's resiliency, and the child and family's willingness to engage in treatment. An algorithm connects the ratings to a level of care recommendation. The instrument specifies six levels of care defined flexibly enough to consider whatever services are available. The results of psychometric testing using raters with a broad range of clinical experience and training from four different systems of care around the country are presented. The testing demonstrates excellent reliability when rating vignettes. Using children and adolescents in live system of care clinical settings, the CALOCUS/CASII demonstrates reasonable validity when compared with the Child Global Assessment Scale, and the Child and Adolescent Functional Assessment Scale. 相似文献