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61.
Dennis E.Shasha 《科学中国》2002,(6)
Alice和Bob玩一种纸牌游戏:Alice取从A(A代表1)到7的7张红桃顺和从A到7的7张黑桃顺共14张牌,然后做一定顺序的排列后反扣在桌面上. 相似文献
62.
Dennis D. Hengstler Dale C. Brandenburg Larry A. Braskamp H. Richard Smock 《Research in higher education》1981,14(3):259-275
This study examined the usefulness of faculty ratings as a measure of departmental quality. Two hundred and thirty-three faculty members from six departments responded to two questionnaires relating to the department—the Department Evaluation Survey (DES)—and to the department head—the Administrator Evaluation Survey (AES). A factor analysis of the DES revealed three underlying dimensions: Satisfaction with the Department's Academic Environment, Satisfaction with the Department's Governance and Operating Procedures, and Satisfaction with Student Quality. The factor analysis of the AES identified only one underlying dimension. Both the DES and AES were found to be highly reliable and effective in discriminating among departments. Very high positive correlations were also found between selacted DES and AES items suggesting that the performance of the head plays a very important role in faculty perceptions of the departments, and vice versa. Faculty ratings would appear to be a useful initial criterion in evaluating a department or head. 相似文献
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Dennis W. Moore Ted Glynn Max Gold 《International Journal of Disability, Development & Education》1993,40(3):193-204
Two and a half years after the initial funding allocation for teacher release hours to establish Support Teacher positions in New Zealand schools, 63 (91%) of the schools with a Support Teacher funding allocation completed a questionnaire on the establishment of the position in the school. Information derived from the questionnaire included qualifications and experience of teachers appointed to the role of Support Teacher, and detail regarding the establishment, practice, and degree of adherence to the Support Team model of operation. Significant difficulties with Support Team establishment and program adherence are reported, notably in selection, training, organizational support, and form of service delivery. The results are discussed in terms of the speed of drift from the model, differences between primary and secondary schools in implementation of the program, the importance of training, and the presence of an active Support Team Management Committee in ensuring effective service delivery. 相似文献
67.
Dennis Atkinson 《The International Journal of Art & Design Education》2006,25(2):116-118
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Rats were trained in a two-lever operant chamber to discriminate the presence versus the absence of a drug. During drug sessions, the training procedure involved reinforcing presses on lever 1 with saccharin-sweetened water but not reinforcing presses on lever 2. During no-drug sessions, only presses on lever 2 were reinforced. After this discrimination was learned, each rat was trained to discriminate presence versus absence of a second drug. All rats learned this second discrimination. Finally, the rats were tested to determine whether they could still discriminate the first drug, as well as other pharmacologically related compounds; most rats could. Training drugs were phenobarbital 30–35, nicotine 0.4, amphetamine 0.4, cyproheptadine 7, phencyclidine 4, cyclazocine 1.5, fentanyl 0.04, and scopolamine 0.2 mg/kg. The results indicate that drug versus no-drug discrimination training does not disrupt discriminative control previously established with a different drug. When considered in combination with the results obtained during substitution tests conducted after drug-versus-no-drug training, the data suggest that, instead of discriminating drug cues versus no-drug cues, rats discriminate presence versus absence of particular drug cues. 相似文献
70.
Three studies are reported which investigated the existence of sex bias in the marking of undergraduate degrees. Study 1 failed to find any evidence that females were marked less extremely than males by second markers, as has been found in previous research. Study 2 found that marker disagreements were not resolved upwards more frequently for male candidates, again contradicting the results of some previous research. Study 3 failed to find any of the expected differences between an institution using blind marking and one using non‐blind procedures. In the light of this negative evidence and of the confusing picture presented by. previous research, it is concluded that there is little firm evidence for sex bias in marking. Despite this, it is likely that there will be increasing pressure to adopt blind marking in the future. 相似文献