This study compared leader behavior ratings of black and white Army infantry squad members serving in squads led either by black or white leaders. One black and one white squad member, chosen at random from each of 34 racially mixed squads, rated their leader's Consideration and Initiation of Structure behaviors (Stogdill, 1963), and their leader's behavior relevant to French and Raven's (1959) five bases of social power. In general, it was found that members who were of the same race as their leader rated him as significantly less likely to use punishment-related behaviors than did members who were of a different race than their leader. However, same-race members did not rate their leader's considerate or structuring behavior differently than did different-race members. The overall pattern of findings were discussed in terms of the leaders' implicit reliance on their punishment power to obtain compliance from different-race subordinates. 相似文献
In this article, themost relevant literature on cognitive aging and instructional design is merged to formulate recommendations for designing computer-based training material aimed at elderly learners. The core message is that researchers and instructional designers do not need to develop special computerized instruction for older adults. Rather, existing principles of general instructional and multimedia design can be evaluated and used to accommodate the needs of elderly learners. Particular attention is given to John Sweller’s Cognitive Load Theory (CLT) and Richard Mayer’s Cognitive Theory of Multimedia Learning (CTML). It is argued that these instructional theories bear important benefits for older learners because they support an efficient use of available cognitive resources. New research directions are suggested to test the implications of these theories for learning in old age.
To date, assessment validity research on non-native English speaking students in the United States has focused exclusively on those who are presently English language learners (ELLs). However, little, if any, research has been conducted on two other sizable groups of language minority students: (a) bilingual or multilingual students who were already English proficient when they entered the school system (IFEPs), and (b) former English language learners, those students who were once classified as ELLs but are now reclassified as being English proficient (RFEPs). This study investigated the validity of several standards-based assessments in mathematics and science for these two student groups and found a very high degree of score comparability, when compared with native English speakers, for the IFEPs, whereas a moderate to high degree of score comparability was observed for the RFEPs. Thus, test scores for these two groups on the assessments we studied appear to be valid indicators of their content knowledge, to a degree similar to that of native English speakers. 相似文献
We highlight critical conceptual and statistical issues and how to resolve them in conducting Satorra–Bentler (SB) scaled difference chi-square tests. Concerning the original (Satorra & Bentler, 2001Satorra, A. and Bentler, P. M.2001. A scaled difference chi-square test statistic for moment structure analysis. Psychometrika, 66: 507–514. [Crossref], [Web of Science ®], [Google Scholar]) and new (Satorra & Bentler, 2010Satorra, A. and Bentler, P. M.2010. Ensuring positiveness of the scaled chi-square test statistic. Psychometrika, 75: 243–248. [Crossref], [Web of Science ®], [Google Scholar]) scaled difference tests, a fundamental difference exists in how to compute properly a model's scaling correction factor (c), depending on the particular structural equation modeling software used. Because of how LISREL 8 defines the SB scaled chi-square, LISREL users should compute c for each model by dividing the model's normal theory weighted least-squares (NTWLS) chi-square by its SB chi-square, to recover c accurately with both tests. EQS and Mplus users, in contrast, should divide the model's maximum likelihood (ML) chi-square by its SB chi-square to recover c. Because ML estimation does not minimize the NTWLS chi-square, however, it can produce a negative difference in nested NTWLS chi-square values. Thus, we recommend the standard practice of testing the scaled difference in ML chi-square values for models M1 and M0 (after properly recovering c for each model), to avoid an inadmissible test numerator. We illustrate the difference in computations across software programs for the original and new scaled tests and provide LISREL, EQS, and Mplus syntax in both single- and multiple-group form for specifying the model M10 that is involved in the new test. 相似文献
The ‘distance’ in distance education (DE) is no longer necessarily great. DE is no longer a makeshift second best to be used only where the face‐to‐face mode is geographically impossible. The parity of esteem which the DE mode already deserves, for mature students, has not yet been achieved, but the trend is in the right direction.
The organisational structure of Deakin University [a mixed institution that teaches both on campus and off campus] is described, emphasising how intimately DE is integrated with other university functions. In comparing DE with the face‐to‐face mode, I argue that distance educators should not be too much on the defensive and list some advantages of DE.
I predict that DE will continue to rise in status and expand in scale, because of its particular suitability for adult students and because of foreseeable developments in technology, especially in microcomputers. My view is that it should regard itself not as a minor speciality but as a leading edge of progress for higher education as a whole. 相似文献