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Rats experienced a spatial pattern of baited and unbaited arms in an eight-arm radial maze. The spatial pattern remained constant
over trials, but the spatial locations that were baited varied unpredictably. Although there was no evidence of control by
the spatial pattern during free choice training trials, the rats’ ability to locate baited arms in forced choice test trials
was superior to that of animals in a control condition for which maze arms were not baited in a consistent spatial pattern.
This is consistent with the results of experiments showing that spatial choices by rats in a pole box maze are controlled
by abstract spatial patterns. 相似文献
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OBJECTIVE: The goal of this study was to examine the association between sexual abuse (SA) and initiation, cessation, and current cigarette smoking among a large representative adult population in France. METHOD: A random sample size of 12,256 adults (18-75 years of age) was interviewed by telephone concerning demographic variables, health practices and beliefs, and health status--for which SA and tobacco questions were included. Bivariate and multivariate analyses were conducted. RESULTS: Nearly 46% of SA survivors were current smokers compared to 34% of non-abused persons (p<.001). Survivors of SA consumed more cigarettes per day than non-abused individuals (14.5 vs. 12.4, p<.01). Survival analysis showed an increased risk of smoking initiation for respondents abused before 18 (adjusted relative hazard=1.55; p<.0001) with referent to the non-abused group. SA was not found to be a significant predictor of current smoking status among those who began smoking after the first incident of SA. Respondents who were not sexually abused were 1.8 times (95% CI, 1.12-2.99) more likely to quit smoking than people who began smoking after they were sexually abused. CONCLUSIONS: The early identification and treatment of sexually abused persons is critical to decrease smoking among adolescents and adults because of the association of SA with both smoking initiation and decreased cessation rates. It may be more difficult to detect an association between SA and current smoking due to the high rates of smoking and lower rates of quitting among the general French population. 相似文献
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Gary Poole 《International Journal for Academic Development》2013,18(4):344-355
Higher education is facing a conundrum relevant to the field of educational development: expectations regarding entrance criteria and graduation attributes are changing simultaneously. Biggs' model of constructive alignment can be used to analyze the challenges presented by these shifts in expectation and help educational developers understand their pedagogical implications. In the present article, an expanded model is proposed in which entrance requirements are added to Biggs' original conceptualization. In so doing, the length of the “learning journey” – from entrance to outcomes – can be charted. When entrance requirements and graduate attributes change simultaneously, higher education must accommodate learning journeys of varying lengths and nature. Moving targets such as these can engender a sense of frustration, if not helplessness, for academic staff responsible for curricular and pedagogical enhancement. However, rather than responding with a sense of helplessness, the educational developer should see these shifts as a real opportunity to support the implementation of a broader range of student-centred teaching/learning activities. Recommendations related to educational development consultations are offered. 相似文献