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Joan E. Sieber Richard E. Clark Helen H. Smith Nancy Sanders 《Contemporary educational psychology》1978,3(3):246-264
The ability to recognize when it is warranted to be uncertain was developed effectively in 167 elementary school students through daily 15-min lessons over a 5-week period. This initial training did not deal with drug use in any way. A 3-year follow-up evaluation measured retention of these warranted-uncertainty skills, and assessed the effects of these skills on students' use of hard and soft drugs. In comparison with the matched control subjects, there was evidence of some retention after 3 years: the trained subjects were slightly better able to recognize when it is warranted to be uncertain about the effects of drugs. There was also strong evidence that many of the controls had acquired, somehow, the ability to generate warranted uncertainty, and that warranted uncertainty functioned as a stable construct (irrespective of how it was acquired) and was related to drug use. It appeared to produce a skepticism or an analytic attitude that allowed the student to ignore peer and parental dogma about drugs. 相似文献
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The purpose of this study was to determine the effects of systematic changes in stride rate and length at a given running speed on the peak shank deceleration (PSD) experienced during ground contact. Data were collected from 10 well-trained subjects as they ran on a treadmill at a pace of 3.8 m s-1 (7-min mile-1). Shank deceleration was measured by a lightweight accelerometer which was tightly attached over the distal medial tibia. High-speed films (200 Hz) were taken from a side view to quantify modifications in sagittal plane movement which might have accompanied the stride rate changes. Five stride rate conditions were randomly presented - 10% slower, 5% slower, normal, 5% faster and 10% faster. Average PSD was computed from 10 steps during each condition and testing was repeated on three different occasions. For each session, PSD observed for each condition was normalized to that observed at the normal stride rate in order to minimize the effects of variations in attachment of the accelerometer between and within subjects. The normalized PSD results at each stride rate tested were - normal = 1.0, 10% slower = 1.09, 5% slower = 1.03, 5% faster = 0.96 and 10% faster = 0.91. Significant differences were found between all these means except normal and 5% slower. The kinematic analysis revealed non-significant results for hip, knee and ankle joint angles at touchdown for the various stride rates. Application of the findings to existing analytical models indicated that, for a given running speed, peak impact forces in the ankle and knee joints decreased as stride rate increased. 相似文献
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This paper develops a framework to assess the text-based public information provided on program level government agency Web sites. The framework informs the larger e-government question of how, or whether, state administrative agencies are using Web sites in a transformative capacity—to change relationships between citizens and government. It focuses on assessing the degree to which text information provided on government Web sites could facilitate various relationships between government agencies and citizens. The framework incorporates four views of government information obligations stemming from different assumptions about citizen–government relationships in a democracy: the private citizen view, the attentive citizen view, the deliberative citizen view, and the citizen–publisher view. Each view suggests inclusion of different types of information on government agency web sites. The framework is employed to assess state Web sites containing information about chronic wasting disease, a disease effecting deer and elk in numerous U.S. states and Canada. 相似文献