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141.
142.
T. W. Robbins E. J. Anderson D. R. Barker A. C. Bradley C. Fearnyhough R. Henson S. R. Hudson A. D. Baddeley 《Memory & cognition》1996,24(1):83-93
Three experiments investigated the role of working memory in various aspects of thinking in chess. Experiment 1 examined the immediate memory for briefly presented chess positions from master games in players from a wide range of abilities, following the imposition of various secondary tasks designed to block separate components of working memory. Suppression of the articulatory loop (by preventing subvocal rehearsal) had no effect on measures of recall, whereas blocking the visuospatial sketchpad (by manipulation of a keypad) and blocking the central executive (by random letter generation) had equivalent disruptive effects, in comparison with a control condition. Experiment 2 investigated the effects of similar secondary tasks on the solution (i.e., move selection) of tactical chess positions, and a similar pattern was found, except that blocking the central executive was much more disruptive than in Experiment 1. Experiment 3 compared performance on two types of primary task, one concerned with solving chess positions as in Experiment 2, and the other a sentence-rearrangement task. The secondary tasks in each case were both designed to block the central executive, but one was verbal (vocal generation of random numbers), while the other was spatial in nature (random generation of keypresses). Performance of the spatial secondary task was affected to a greater extent by the chess primary task than by the verbal primary task, whereas there were no differential effects on these secondary tasks by the verbal primary task. In none of the three experiments were there any differential effects between weak and strong players. These results are interpreted in the context of the workingmemory model and previous theories of the nature of cognition in chess. 相似文献
143.
Donald G. Barker 《Journal of Employment Counseling》1971,8(1):26-30
Tabulation of the color discrimination requisites of a representative sample of 4,000 jobs revealed that the great majority of jobs require little or no color perception aptitude. The 2 percent of jobs requiring above-average color discrimination were listed by Dictionary of Occupational Titles classifications for the use of counselors in the guidance of clients with defective color vision. 相似文献
144.
145.
The issue of representing access control requirements continues to demand significant attention. The focus of researchers
has traditionally been on developing particular access control models and policy specification languages for particular applications.
However, this approach has resulted in an unnecessary surfeit of models and languages. In contrast, we describe a general
access control model and a logic-based specification language from which both existing and novel access control models may
be derived as particular cases and from which several approaches can be developed for domain-specific applications. We will
argue that our general framework has a number of specific attractions and an implication of our work is to encourage a methodological
shift from a study of the particulars of access control to its generalities. 相似文献
146.
Mark Smedley Edward M. Levinson William F. Barker Danielle L. DeAngelis 《Journal of Employment Counseling》2003,40(3):108-122
The authors investigated the level of career maturity of nonadjudicated high school students without disabilities and 3 groups of adjudicated high school students: those without disabilities, those with learning disabilities, and those with emotional disturbance. Also investigated was the relationship between career maturity and behavioral functioning, using the Behavior Assessment System for Children‐Self‐Report of Personality (BASC‐SRP; C. R. Reynolds & R. W. Kamphaus, 1992). No significant differences existed between nonadjudicated and adjudicated students without disabilities. Adjudicated students with emotional disabilities and learning disabilities scored significantly lower than nonadjudicated high school students without disabilities on the overall measure of career maturity. Career maturity was found to be significantly but only moderately related to 8 behavioral domains on the BASC‐SRP. 相似文献
147.
This paper reviews empirical studies on whether participating in mutual help groups for people with mental health problems leads to improved psychological and social functioning. To be included, studies had to satisfy four sets of criteria, covering: (1) characteristics of the group, (2) target problems, (3) outcome measures, and (4) research design. The 12 studies meeting these criteria provide limited but promising evidence that mutual help groups benefit people with three types of problems: chronic mental illness, depression/anxiety, and bereavement. Seven studies reported positive changes for those attending support groups. The strongest findings come from two randomized trials showing that the outcomes of mutual help groups were equivalent to those of substantially more costly professional interventions. Five of the 12 studies found no differences in mental health outcomes between mutual help group members and non-members; no studies showed evidence of negative effects. There was no indication that mutual help groups were differentially effective for certain types of problems. The studies varied in terms of design quality and reporting of results. More high-quality outcome research is needed to evaluate the effectiveness of mutual help groups across the spectrum of mental health problems. 相似文献
148.
This article examines the role of military chaplains who accompany soldiers on international military and peace-keeping operations, such as those in Iraq, Afghanistan, Kosovo, and Bosnia Herzegovina. It compares and contrasts the two principal traditions of military chaplaincy in the international field—chaplains within the military structure (as in the UK) and parish-based chaplains who remain outside the military (as in Germany). The authors examine the potential conflict between the religious vocation of military chaplains and their role in military operations, which can be particularly contentious from an ethical viewpoint. Interviews with chaplains from both countries provide a unique insight into their experiences. 相似文献
149.
Variability in subcortical aphasia is due to variable sites of cortical hypoperfusion 总被引:12,自引:0,他引:12
Hillis AE Barker PB Wityk RJ Aldrich EM Restrepo L Breese EL Work M 《Brain and language》2004,89(3):524-530
A variety of fluent and nonfluent aphasias have been reported after left basal ganglia stroke. It has been speculated that this heterogeneity may reflect variations in cortical hypoperfusion resulting from large vessel stenosis. To test this hypothesis, a consecutive series of 24 patients with left caudate infarct identified with diffusion-weighted imaging underwent language testing and perfusion-weighted imaging < 24h from onset of symptoms. Specific regions in perisylvian cortex were rated for the percentage of the region that was hypoperfused. Aphasia type was determined on the basis of speech fluency, comprehension, and repetition performance on the language tests. Association between aphasia type/language impairment and regions of hypoperfusion were identified with Fisher's exact tests. Results demonstrated that in patients with acute left caudate infarct, the presence and type of aphasia reflected regions of hypoperfusion, and generally followed predictions based on chronic lesion studies, regarding anatomical lesions associated with classic aphasia types. 相似文献
150.
Wiggins OP Barker JH Martinez S Vossen M Maldonado C Grossi F Francois C Cunningham M Perez-Abadia G Kon M Banis JC 《The American journal of bioethics : AJOB》2004,4(3):1-12
Transplantation continues to push the frontiers of medicine into domains that summon forth troublesome ethical questions. Looming on the frontier today is human facial transplantation. We develop criteria that, we maintain, must be satisfied in order to ethically undertake this as-yet-untried transplant procedure. We draw on the criteria advanced by Dr. Francis Moore in the late 1980s for introducing innovative procedures in transplant surgery. In addition to these we also insist that human face transplantation must meet all the ethical requirements usually applied to health care research. We summarize the achievements of transplant surgery to date, focusing in particular on the safety and efficacy of immunosuppressive medications. We also emphasize the importance of risk/benefit assessments that take into account the physical, aesthetic, psychological, and social dimensions of facial disfiguration, reconstruction, and transplantation. Finally, we maintain that the time has come to move facial transplantation research into the clinical phase. 相似文献