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61.
Gregory Camilli 《Psychometrika》1995,60(2):305-312
It is demonstrated in this paper that two major tests for 2 × 2 talbes are highly related from a Bayesian perspective. Although it is well-known that Fisher's exact and Pearson's chi-square tests are asymptotically equivalent, the present analysis shows that a formal similarity also exists in small samples. The key assumption that leads to the resemblance is the presence of a continuous parameter measuring association. In particular, it is shown that Pearson's probability can be obtained by integrating a two-moment approximation to the posterior distribution of the log-odds ratio. Furthermore, Pearson's chi-square test gave an excellent approximation to the actual Bayes probability in all 2×2 tables examined, except for those with extremely disproportionate marginal frequencies. 相似文献
62.
63.
Paul R. Rosenbaum 《Psychometrika》1987,52(2):217-233
Test items are often evaluated and compared by contrasting the shapes of their item characteristics curves (ICC's) or surfaces. The current paper develops and applies three general (i.e., nonparametric) comparisons of the shapes of two item characteristic surfaces: (i) proportional latent odds, (ii) uniform relative difficulty, and (iii) item sensitivity. Two items may be compared in these ways while making no assumption about the shapes of item characteristic surfaces for other items, and no assumption about the dimensionality of the latent variable. Also studied is a method for comparing the relative shapes of two item characteristic curves in two examinee populations.The author is grateful to Paul Holland, Robert Mislevy, Tue Tjur, Rebecca Zwick, the editor and reviewers for valuable comments on the subject of this paper, to Mari A. Pearlman for advice on the pairing of items in the examples, and to Dorothy Thayer for assistance with computing. 相似文献
64.
T. J. J. M. Theunissen 《Psychometrika》1985,50(4):411-420
An algorithmic approach to test design, using information functions, is presented. The approach uses a special branch of linear programming, i.e. binary programming. In addition, results of some benchmark problems are presented. Within the same framework, it is also possible to formulate the problem of individualized testing.I would like to thank my colleagues N. Veldhuijzen, H. Verstralen and M. Zwarts for their suggestions and comments. Furthermore, I would like to thank Professor W. van der Linden, Department of Educational Measurement and Data Analysis, Technological University Twente, for offering facilities at his department; Ellen Timminga of the same department and S. Baas, department of Operational Research at the same University for their efforts in linear programming. 相似文献
65.
Anthony P. McLean Randolph C. Grace Olesya T. Shevchouk Jacinta R. Cording 《Journal of the experimental analysis of behavior》2018,109(2):313-335
In two experiments, experimentally naïve rats were trained in concurrent variable‐interval schedules in which the reinforcer ratios changed daily according to a pseudorandom binary sequence. In Experiment 1, relative response rates showed clear sensitivity to current‐session reinforcer ratios, but not to previous sessions' reinforcer ratios. Within sessions, sensitivity to the current session's reinforcement rates increased steadily, and by session end, response ratios approached matching to the current‐session reinforcer ratios. Across sessions, sensitivity to the current session's reinforcer ratio decreased with continued exposure to the pseudorandom binary sequence, contrary to expectations based on previous studies demonstrating learning sets. Using a second group of naïve rats, Experiment 2 replicated the main results from Experiment 1 and showed that although there were increases over sessions in both changeover rate and response rate during the changeover delay, neither could explain the accompanying reductions in sensitivity. We consider the role of reinforcement history, showing that our results can be simulated using two separate representations, one local and one nonlocal, but a more complex approach will be needed to bring together these results and other history effects such as learning sets and spontaneous recovery. 相似文献
66.
The involvement of religious beliefs and practices in the way of coping with stressful events is coined by the term of religious coping. It is commonly distinguished the positive from the negative patterns of religious coping (i.e., a secure and a less secure relationship with God respectively) as assessed by the Brief RCOPE. The interest for the religious coping patterns lies in their predictive value for the quality of the adjustment to stress. After controlling for the effects of sociodemographic variables, and nonreligious coping measures, the positive pattern is a significant predictor of well-being while the negative pattern promotes a poorer physical and mental health. This study was designed to validate the French version of the Brief RCOPE.
Method
Participants. Our sample (N = 250) included students in psychology and community dwelling people. Assessments. Religious coping (Brief-RCOPE), coping strategies (Brief COPE), personality (TCI-56), social support (SSQ), perceived stress (PSS), depression (HADS), life-events (SRRS), religious outcomes and global religious scales. Statistical analyses. We performed an Exploratory Factorial Analysis (EFA) with Oblimin rotation (structural validity) and correlations (Pearson’r) between the two Brief RCOPE scales and the other measures included in this study (criterion validity). The Cronbach alpha (internal consistency) and the ICC correlations (test–retest) were calculated to estimate the reliability of the two dimensions of the Brief RCOPE.Results
Validity. The EFA provides a two-factor solution differentiating the negative items (negative pattern) and the positive items (positive pattern). Convergent and criterion validity: Positive religious coping was positively associated with the social support satisfaction dimension, global religious measure, religious outcomes, the Brief COPE's religious dimension and the self transcendence scale. It was not associated with the disponibility dimension of social support and with the life events score. Negative religious coping was positively associated with perceived stress, depression, life events, global religious measure and religious outcomes. It was not associated with the social support dimensions. This results support the criterion validity of the scale. Reliability. Internal consistency and temporal stability are satisfactory.Discussion
The French translation of the Brief RCOPE consists of a valid and easy-to-use method to assess the positive and negative patterns of religious coping. Our results confirm the positive pattern predicts a better adjustment to strains and the limits of this study are discussed. 相似文献67.
68.
We study the semantic relationship between pairs of nouns of concrete objects such as “HORSE - SHEEP” and “SWING - MELON” and how this relationship activity is reflected in EEG signals. We collected 18 sets of EEG records; each set containing 150 events of stimulation. In this work we focus on feature extraction algorithms. Particularly, we highlight Common Spatial Pattern (CSP) as a method of feature extraction. Based on these latter, different classifiers were trained in order to associate a set of signals to a previously learned human answer, pertaining to two classes: semantically related, or not semantically related. The results of classification accuracy were evaluated comparing with other four methods of feature extraction, and using classification algorithms from five different families. In all cases, classification accuracy was benefited from using CSP instead of FDTW, LPC, PCA or ICA for feature extraction. Particularly with the combination CSP-Naïve Bayes we obtained the best average precision of 84.63%. 相似文献
69.
Jonathan Derek Smith 《Psychodynamic Practice》2018,24(1):21-39
Drawing upon the work of Adam Phillips and Ronald Britton the author highlights the intimidating and fear-inducing nature of the super-ego and the role of the therapist in supporting the judgements of the ego and liberating it from the domination of the super-ego. He goes on to explore the proposition that moral principles do not need to be oppressive in nature and that they can emanate from objects that are more akin to sexual or aesthetic objects. These themes are linked to Woodmansey’s conceptualistion of the punitive and humiliating super-ego, and the origin of the super-ego as an internalisation of an external conflict is outlined. The role of identifying a Cyclical Maladaptive Pattern as a focus and its contribution in identifying the super-ego and how it manifests in the client’s narrative are explored, as well as the crucial contribution of a playful stance on the part of therapist in subverting and undermining the intimidating strictures of the super-ego. 相似文献
70.
“三番式”临床技能教学模式的建立及其在临床医学教学中的应用与思考 总被引:1,自引:0,他引:1
传统的临床技能教学存在诸多弊端,从而影响了医学生临床技能的培养及合格医学人才的培养。我们在多年的临床教学实践基础上,构建了临床技能学实践教学平台,创建了“三番式”临床技能教学模式,并将其应用于临床实践教学中,对所取得的显著教学效果进行深入剖析。 相似文献