Power of the likelihood ratio test in covariance structure analysis

A procedure for computing the power of the likelihood ratio test used in the context of covariance structure analysis is derived. The procedure uses statistics associated with the standard output of the computer programs commonly used and assumes that a specific alternative value of the parameter vector is specified. Using the noncentral Chi-square distribution, the power of the test is approximated by the asymptotic one for a sequence of local alternatives. The procedure is illustrated by an example. A Monte Carlo experiment also shows how good the approximation is for a specific case.This research was made possible by a grant from the Dutch Organization for Advancement of Pure Research (ZWO). The authors also like to acknowledge the helpful comments and suggestions from the editor and anonymous reviewers.     

On more powerful tests of judge agreement with a known standard

To establish the existence of his abilities, a judge is given the task of classifying each ofN=rs subjects into one ofr known categories, each containings of the subjects. An incomplete design is proposed whereby the judge is presented withb groups, each one containingn=rs/b<r subjects. Then different categories corresponding to members of the group are known. Using the total number of correct classifications, this method of grouping is compared to that in which the group size is equal to the number of categories. The incomplete grouping is shown to yield a more powerful test for discriminating between the null hypothesis that the judge is guessing the classifications and the alternative hypothesis that he has some definite abilities. The incomplete design is found to be most effective (powerful) when the number of subjects in a group is limited to two or three.The author is grateful for the suggestions of the referees and the editor, which greatly improved the paper.     

Response–reinforcer contiguity versus response-rate–reinforcer-rate covariance in rats' lever pressing: Support for a multiscale view

The multiscale molar view sees behavior as a flow, like a river, extended in time. Matching theory expresses the way activities compete for time. Relative time taken by any activity depends on relative induction. The present experiment tested matching theory applied to concurrent contingent and noncontingent food. As adjunctive activities that compete with operant activity, we recorded hopper head entries and presses on a lever near the food hopper that had no programmed consequences. Eight naïve rats were first exposed to a variable-time 60 s schedule, which across conditions was gradually transformed into a variable-interval 60 s schedule by increasing the proportion of food that was delivered contingent on pressing a lever far from the hopper. Another group of 4 rats that had been trained to press a lever near a food hopper were introduced in the second condition, in which one food delivery was contingent on far-lever pressing. We found induction following a power function to describe pressing on the far lever (operant activity). Matching theory combined with power-function induction also accounted for adjunctive activity. Results with single contingent food deliveries provided little support for the molecular view that behavior consists of discrete responses “strengthened” by immediately following reinforcers.     

The propensity to perceive meaningful coincidences is associated with increased posterior alpha power during retention of information in a modified Sternberg paradigm

There are ample inter-individual differences in the frequency with which people perceive meaningful coincidences. Previous research has identified increased proactive interference, that is a reduced working memory capacity, as one possible mechanism associated with this phenomenon. The present study aimed at extending this finding into the domain of neuroscience, (1) by assessing EEG alpha oscillations during the retention of information, (2) by replicating the behavioral link between meaningful coincidences and proactive interference. In a sample of 52 participants, the behavioral replication was successful. Furthermore, participants who perceived more meaningful coincidences showed higher alpha power increases at parietal-occipital sites, and at the same time, displayed lower alpha power increases at frontal areas, during retention of information. This neurophysiological activation pattern further underlines the assumption that participants who perceive more meaningful coincidences show lower working memory capacities, since increased alpha power at parietal areas reflects a higher load on working memory demands.     

The Power to Detect and Predict Individual Differences in Intra-Individual Variability Using the Mixed-Effects Location-Scale Model

Our goal is to provide empirical scientists with practical tools and advice with which to test hypotheses related to individual differences in intra-individual variability using the mixed-effects location-scale model. To that end, we evaluate Type I error rates and power to detect and predict individual differences in intra-individual variability using this model and provide empirically-based guidelines for building scale models that include random and/or systematically-varying fixed effects. We also provide two power simulation programs that allow researchers to conduct a priori empirical power analyses. Our results aligned with statistical power theory, in that, greater power was observed for designs with more individuals, more repeated occasions, greater proportions of variance available to be explained, and larger effect sizes. In addition, our results indicated that Type I error rates were acceptable in situations when individual differences in intra-individual variability were not initially detectable as well as when the scale-model individual-level predictor explained all initially detectable individual differences in intra-individual variability. We conclude our paper by providing study design and model building advice for those interested in using the mixed-effects location-scale model in practice.     

建构主义教学与元思维的关系:认知压力的解释

本研究采用建构主义教学评估问卷、认知压力问卷、一般元思维量表与情境元思维量表对381名学生进行测量,考察了建构主义教学与元思维之间的关系,以及一级、二级认知压力在其中的中介或解释作用。研究采用结构方程模型分析,结果显示:(1)仅考虑一级认知压力时,建构主义教学能正向预测两种元思维,一级认知压力在建构主义教学与两种元思维间皆起部分中介作用;(2)仅考虑二级认知压力时,其在建构主义教学与两种元思维间皆起完全中介作用;(3)同时加入两种认知压力时,仅二级认知压力的中介作用显著。     

“It's ok if it's hidden”: The discursive construction of everyday racism for refugees and asylum seekers in Wales

Wales has a long history of migration; however, the introduction of dispersed asylum seekers in 2001 has led to Wales becoming a more superdiverse nation. Wales has often been positioned as a more “tolerant nation” than England; however, the increasingly superdiverse nature of Wales in a postdevolution era may now be calling this tolerance thesis into question. Models of refugee and asylum seeker integration suggest that the absence of racism plays a key role in integration. This paper reports the findings of research that centres on refugee and asylum seeker integration in Wales. Nineteen interviews were conducted with refugees and asylum seekers who had been living in Wales for between 1 month and 12 years. Each interview was analysed using a discursive psychology approach. In this paper, I show that the interviewees appeared to negotiate a dilemma when talking about experiencing potentially racist incidents within the interviews, constructing them as trivial so as not to appear critical of the protection they have received in Wales. The findings also highlight the more everyday and banal forms of racism that are regularly experienced by refugees and asylum seekers living in Wales.     

Medicalizing tensions in counselor education?

The aim of this paper is to summarize research into the tensions associated with medicalization in graduate counselor education in a primarily Canadian context. Counselor education, until recently, has largely embraced pluralistic traditions of practice that are potentially at odds with a medicalized approach to practice. Medicalization here refers to a diagnostic and treatment focus most commonly associated with use of DSM5 diagnostic procedures and evidence-based treatment. Tensions, in this study, refer to competing accountabilities encountered in reconciling medicalized with other approaches to practice. Following a review of relevant textbooks, graduate program websites and curricula, Master’s-level counseling students, counselor educators, and profession leaders were surveyed and/or interviewed regarding how medicalization influenced counselor education, and for how they responded to its influence. Data across all sources were analyzed using the mapping procedures of Situational Analysis, a method useful in analyzing contested phenomena and processes. We report our findings as navigable, negotiable, and dilemmatic tensions shaping the experiences of students and other stakeholders in counselor education. We recommend ways to enable students and educators to navigate and negotiate potential dilemmas associated with medicalizing influences on counselor education. We close by discussing the implications of our findings with respect to practice and training in the UK context.     

Religious/secular discourses and practices of good sex

This article focuses on the triangulation of sexuality, religion and secularity in Dutch society by analysing two contemporary case studies. We focus on sexual experiences and practices rather than sexual identities to further understand the constructions of what constitutes ‘good’ sex. The empirical research is situated in the Netherlands, where the binary of religion and sexual regulation versus secularity and sexual freedom has been dominant in both public and political discourse for a long time. Exploring sexual practices and narratives as central to the constitution of both religious and secular selves, we noted these to be fluctuating, inconsistent and subject to discourses. Our first case study discusses sexual experiences of non-heterosexual Protestant women, whereas the second explores the frequently considered ‘neutral’ notions of secularity in sexual education. Applying insights from both religious studies and queer studies, we bring the empirical study of sexuality together with the theoretical debates about the conceptualisation of the secular and the religious in contemporary Western Europe. This comparative approach to sexuality not only undermines the culturally presumed exclusive opposition of the secular and the religious but it also provides new empirical contributions for understanding the interactions between sexual practices and sexual discourses.