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The present study explored the environmental and genetic etiologies of the longitudinal relations between prereading skills and reading and spelling. Twin pairs (n = 489) were assessed before kindergarten (M = 4.9 years), post‐first grade (M = 7.4 years), and post‐fourth grade (M = 10.4 years). Genetic influences on five prereading skills (print knowledge, rapid naming, phonological awareness, vocabulary, and verbal memory) were primarily responsible for relations with word reading and spelling. However, relations with post‐fourth‐grade reading comprehension were due to both genetic and shared environmental influences. Genetic and shared environmental influences that were common among the prereading variables covaried with reading and spelling, as did genetic influences unique to verbal memory (only post‐fourth‐grade comprehension), print knowledge, and rapid naming.  相似文献   
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In every generation, some event serves to remind us that the exercise of power is always in part a function of control over geography.  相似文献   
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The mistakes made when attempting tasks often prove to be some of the most invaluable learning experiences. Despite this, outcome and results driven assessment formats largely penalise student performance errors or reward students who succeed by chance. The consequences of this paradigm are visible effects on student relationships with assessment. The student–tutor consensus approach to assessment was introduced to capture student learning achieved ‘from’ assessment to complement the measurement of performance outcomes. This approach parallels student and tutor judgement in a grade negotiation, affording the student an opportunity to share with their assessor what they have learned from the assessment activity. This student self-awareness was then considered alongside the conventional outcome-based score awarded by the tutor to generate a final grade for the assessed activity. Our study evaluated the perceptions of 90 undergraduate students enrolled in the bachelor of paramedic studies, who participated in this novel assessment approach as part of a final-year capstone topic. The results comprehensively indicated value for all aspects of the assessment approach, as well as a recognition that the skills will be useful in their future professional roles.  相似文献   
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This paper examines sexual prejudice against gays and lesbians by college students. The sample consisted of 325 undergraduate students at a mid-sized Midwestern university. Respondents completed Herek’s Attitudes Toward Lesbians and Gay Men scale (short form) to determine levels of sexual prejudice. Comparisons were then made by respondent major to determine whether criminal justice students displayed higher levels of sexual prejudice than other students. Unlike prior research on criminal justice students and sexual prejudice, the criminal justice respondents in this study were not significantly more prejudiced against gays and lesbians. Male and female students scored similarly on their attitudes toward lesbian women, but male students were more likely to have higher levels of prejudice against gay men. Students who had gay friends and/or family members held significantly lower levels of prejudice against both gay men and lesbians than those who had no gay friends or family members.  相似文献   
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From a number of ML estimators (typically unbiased) of practical interest which include the variance for a Gaussian distribution, the standard deviation for a Laplace distribution, the variance for a Rayleigh distribution and a “spread parameter” for a Cauchy distribution, we design robust estimators according to an emphasis balance between normalized performance and normalized robustness. We measure performance with inverted MSE and robustness with a differential geometric approach.  相似文献   
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