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Large-scale assessments often use a computer adaptive test (CAT) for selection of items and for scoring respondents. Such tests often assume a parametric form for the relationship between item responses and the underlying construct. Although semi- and nonparametric response functions could be used, there is scant research on their performance in a CAT. In this work, we compare parametric response functions versus those estimated using kernel smoothing and a logistic function of a monotonic polynomial. Monotonic polynomial items can be used with traditional CAT item selection algorithms that use analytical derivatives. We compared these approaches in CAT simulations with a variety of item selection algorithms. Our simulations also varied the features of the calibration and item pool: sample size, the presence of missing data, and the percentage of nonstandard items. In general, the results support the use of semi- and nonparametric item response functions in a CAT. 相似文献
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Ian Falk 《Community College Journal of Research & Practice》2013,37(8):697-703
Every so often, it is important to stand back and look at the whole context of our field of research and practice. In this article, I do this by shedding light on the ways we view the term vocations and the consequences of those views for education and training in community colleges and adult and community education providers of all kinds. I ask the question: What is Vocational Education and Training (VET) for? I ask this particular question because I know the answers are contested, staking out claims for territory in research and practice. The answer to the question that this article explores is that vocational education and training ''serve industry.'' Using Australia as a specific example of such a Western country, the article argues that the entrenched meanings for VET as serving industry have disenfranchised a large proportion of the population - especially small business and the rural sector. The article is pointing out that the resulting version of VET is gendered, classed, and urban-specific. This structurally entrenched position is then contrasted with data reported from empirical studies currently examining (among other things) the nature of vocations and work at a community level and the manner in which they are created there. The article raises three important implications: the convergence of Adult and Community Education with VET, learning pathways, and the effects on small business. 相似文献
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Raphael Jacqueline Tobias Sheila Greenberg Richard 《Journal of Science Teacher Education》1999,10(2):147-158
Journal of Science Teacher Education - 相似文献
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现在 ,澳大利亚大约有 130 0个苗族人 ,(statis ticsinthisentryareestimatesmadebytheHmongcommu nity .The 1991censusconductedbytheAustralianBureauofStatisticsdidnotincludeanancestryquestion ,norwasHmongcodedasalanguage .ThustheAustralianHumongareconcealedamongstthestatisticsfor)是… 相似文献
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João Pedro Araújo Naves Ana Cristina Silva Rebelo Lucas Raphael Bento E Silva Maria Sebastiana Silva Rodrigo Ramirez-Campillo Robinson Ramírez-Vélez 《European Journal of Sport Science》2019,19(5):653-660
High Intensity Interval Training (HIIT) can be performed with different effort to rest time-configurations, and this can largely influence training responses. The purpose of the study was to compare the acute physiological responses of two HIIT and one moderate intensity continuous training (MICT) protocol in young men. A randomised cross-over study with 10 men [age, 28.3?±?5.5years; weight, 77.3?±?9.3?kg; height, 1.8?±?0.1?m; peak oxygen consumption (VO2peak), 44?±?11?mL.kg?1.min?1]. Participants performed a cardiorespiratory test on a treadmill to assess VO2peak, velocity associated with VO2peak (vVO2peak), peak heart rate (HRpeak) and perceived exertion (RPE). Then participants performed three protocols equated by distance: Short HIIT (29 bouts of 30s at vVO2peak, interspersed by 30s of passive recovery, 29?min in total), Long HIIT (3 bouts of 4?min at 90% of vVO2peak, interspersed by 3?min of recovery at 60% of vVO2peak, 21?min in total) and MICT (21?min at 70% of vVO2peak). The protocols were performed in a randomised order with ≥48 h between them. VO2, HRpeak and RPE were compared. VO2peak in Long HIIT was significantly higher than Short HIIT and MICT (43?±?11 vs 32?±?8 and 37?±?8?mL.kg?1.min?1, respectively, P?0.05), as well as peak HR (181?±?10 vs 168?±?8 and 167?±?11, respectively, P?0.05), and RPE (17?±?4 vs 14?±?4 and 15?±?4, respectively, P?0.05), with no difference between Short HIIT and MICT. In conclusion, Long HIIT promoted higher acute increases in VO2, HR and RPE than Short HIIT and MICT, suggesting a higher demand on the cardiorespiratory system. Short HIIT and MICT presented similar physiologic and perceptual responses, despite Short HIIT being performed at higher velocities. 相似文献
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Abstract This article describes the findings of studies conducted on a large-scale, classroom-based performance assessment of literacy for the early grades designed to provide information that is useful for reporting, as well as teaching. Technical studies found the assessment to be a promising instrument that is reliable and valid. Follow-up studies of the assessment's use point to its positive impact on teachers' practice and on school and district policies. The studies' findings suggest that classroom-based performance assessment can be a viable accountability, as well as instructional, tool, capturing a range of students' abilities in a range of formats, and that use of such an assessment has the potential to enhance teachers' knowledge about literacy and their abilities to effectively support students' learning. 相似文献
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