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121.
A rasch model for partial credit scoring 总被引:24,自引:0,他引:24
Geoff N. Masters 《Psychometrika》1982,47(2):149-174
A unidimensional latent trait model for responses scored in two or more ordered categories is developed. This “Partial Credit”
model is a member of the family of latent trait models which share the property of parameter separability and so permit “specifically
objective” comparisons of persons and items. The model can be viewed as an extension of Andrich's Rating Scale model to situations
in which ordered response alternatives are free to vary in number and structure from item to item. The difference between
the parameters in this model and the “category boundaries” in Samejima's Graded Response model is demonstrated. An unconditional
maximum likelihood procedure for estimating the model parameters is developed.
Preparation of this paper was supported by grants from the Spencer Foundation and the National Institute for Justice. I would
like to thank Professor Benjamin D. Wright of the University of Chicago for his very kind help with the various drafts of
this paper. 相似文献
122.
A loglinear IRT model is proposed that relates polytomously scored item responses to a multidimensional latent space. The analyst may specify a response function for each response, indicating which latent abilities are necessary to arrive at that response. Each item may have a different number of response categories, so that free response items are more easily analyzed. Conditional maximum likelihood estimates are derived and the models may be tested generally or against alternative loglinear IRT models.Hank Kelderman is currently affiliated with Vrije Universiteit, Amsterdam.We thank Linda Vodegel-Matzen of the Division of Developmental Psychology of the University of Amsterdam for making available the data used in the example in this article. 相似文献
123.
This paper describes the conjunctive counterpart of De Boeck and Rosenberg's hierarchical classes model. Both the original model and its conjunctive counterpart represent the set-theoretical structure of a two-way two-mode binary matrix. However, unlike the original model, the new model represents the row-column association as a conjunctive function of a set of hypothetical binary variables. The conjunctive nature of the new model further implies that it may represent some conjunctive higher order dependencies among rows and columns. The substantive significance of the conjunctive model is illustrated with empirical applications. Finally, it is shown how conjunctive and disjunctive hierarchical classes models relate to Galois lattices, and how hierarchical classes analysis can be useful to construct lattice models of empirical data.The research reported in this paper was supported by NATO (Grant CRG.921321 to Iven Van Mechelen and Seymour Rosenberg) and by the Research Fund of Katholieke Universiteit Leuven (Grants PDM92/19 and POR93/3 to Iven Van Mechelen; Grants OT89/9 and F91/56 to Paul De Boeck). 相似文献
124.
125.
模糊偏序关系在心理学研究中的应用 总被引:5,自引:0,他引:5
本文首次给出建立模糊偏序关系矩阵的可行途径。以大学生的颜色爱好实验为例,论证了采用本文所建立的模糊偏序关系矩阵进行排序的方法是制作顺序量表的一种较佳方法。 相似文献
126.
For trinary partial credit items the shape of the item information and the item discrimination function is examined in relation to the item parameters. In particular, it is shown that these functions are unimodal if 2 – 1 < 4 ln 2 and bimodal otherwi The locations and values of the maxima are derived. Furthermore, it is demonstrated that the value of the maximum is decreasing in 2 – 1. Consequently, the maximum of a unimodal item information function is always larger than the maximum of a bimodal one, and similarly for the item discrimination function.The work reported herein was partially supported under the National Assessment of Educational Progress (Grant No. R999G30002; CFDA No. 84.999G) as administered by the Office of Educational Research and Improvement, US Department of Education. 相似文献
127.
Interval time sampling yields the result, percentage of intervals scored. It is rudimentary to note that this measure per se does not constitute a response dimension. It is a useful behavioral measure, therefore, only to the extent that it accurately reflects the nature and degree of the fundamental dimensions from which it is drawn i.e., frequency and duration. The correspondence between scored intervals and response duration is fairly well understood (Journal of Applied Behavior Analysis, 1975, 8 , 463–469; 1977, 10 , 325–332). This study determined the correspondence between scored intervals and response frequency. Eleven, 30-minute experimental sessions that differed along the variables of frequency of occurrence and time per response (the average length of a response per session) were computer simulated. In the first group of four sessions, the frequencies were 45, 100, 150, and 300; in these sessions, all responses ranged from one to three seconds. In the second group of four sessions, the frequencies were 31, 61, 101, and 152; in these sessions, all responses ranged from three to nine seconds. In the last group of three sessions, the frequencies were 25, 34, and 50; here, all responses ranged from nine to 27 seconds. The response distribution within the above ranges was rectangular, with each whole second represented once. The responses were selected by a random number generator, and on each trial every number in the distribution had an equal probability of occurrence. These provisions produced a linear pattern of responding. The time per response in the three groups of sessions were 2, 6, and 18 seconds. For all sessions, event recordings were made and analyzed. The analysis consisted of using partial interval time sampling to determine the percentage of intervals scored; this total was subdivided into intervals containing (1) single responses, (2) multiple responses, (3) continuing responses, and (4) response initiations or terminations. The analysis was performed when the length of the observation interval was 5, 10, 20, 30, 60, and 120 seconds. An additional session drawn from a study that contained real-life data was subjected to this same analysis. The most significant results were derived by finding the ratio of scored intervals containing single responses to the total intervals scored. If every scored interval contained a single response, this ratio would equal 1.0; if no scored interval contained a single response, the ratio would be 0.0. It can be seen that this ratio is an objective expression of the validity of interval time sampling as a measure of response frequency. Of 66 data points (11 sessions × six observation lengths per session), only five were equal to or greater than 0.80. These five points were all found in just two sessions (f = 45, 100). A validity index of less than 0.50 was observed in 49 of the 66 points. Also, the validity index increased, peaked, and then decreased within sessions as the length of the observation interval was increased. The results from the real-life session were in close agreement with those obtained from the simulations. The importance of these and previous findings lies in the demonstration that changes in scored intervals need not represent true behavior change. The data indicate that there are many combinations of behavioral frequency and duration where interval time sampling cannot produce valid measurement results. 相似文献
128.
与Brenmer等(1997)的实验对照,对4~7岁的儿童考察观察角度的变化方式、模型状态、年龄等与其绘画简单深度关系中视觉写实水平的关系。实验结果表明:年龄是影响儿童绘画简单深度关系中视觉写实水平的重要因素;观察角度变化的两种方式在6~7岁组有显著差异;模型状态对不同性别儿童的绘画成绩影响显著。 相似文献
129.
Otávio Bueno 《Studia Logica》2008,89(2):213-235
Scientific change has two important dimensions: conceptual change and structural change. In this paper, I argue that the existence
of conceptual change brings serious difficulties for scientific realism, and the existence of structural change makes structural
realism look quite implausible. I then sketch an alternative account of scientific change, in terms of partial structures,
that accommodates both conceptual and structural changes. The proposal, however, is not realist, and supports a structuralist
version of van Fraassen’s constructive empiricism (structural empiricism). 相似文献
130.
部件、结构和名称对图形相似性判断的影响 总被引:1,自引:0,他引:1
以不同基本形状构成的几何图形为材料,研究了图形的部件形状、整体结构和名称对相似判断的影响。结论为:1)部件形状、整体结构和名称对相似判断估计值均有非常显著影响,且部件形状和整体结构的交互作用也非常显著;2)部件形状、整体结构和名称对相似判断反应时没有显著的影响,但部件形状和整体结构、整体结构和名称两组交互作用均非常显著;3)部件形状和整体结构相同对相似判断估计值的影响更大;名称和部件形状、名称和整体结构相同的条件居次;只有一个因素相同时,部件形状相同影响最大,其次是整体结构和名称。 相似文献