Derivation of likelihood-ratio tests for Guttman quasi-simplex covariance structures

In this paper, maximum-likelihood estimates have been obtained for covariance matrices which have the Guttman quasi-simplex structure under each of the following null hypotheses: (a) The covariance matrix , can be written asTT + where and are both diagonal matrices with unknown elements andT is a known lower triangular matrix, and (b) the covariance matrix *, is expressible asT*T + I where is an unknown scalar. The linear models from which these covariance structures arise are also stated along with the underlying assumptions. Two likelihood-ratio tests have been constructed, one each for the above null hypotheses, against the alternative hypothesis that the population covariance matrix is simply positive definite and has no particular pattern. A numerical example is provided to illustrate the test procedure. Possible applications of the proposed test are also suggested.Adapted from portions of the author's dissertation under the same title submitted to the Department of Psychology, University of North Carolina, in partial fulfillment of the requirements for the Ph.D. degree. The author wishes to express his gratitude to his thesis chairman Dr. R. Darrell Bock and to his committee members Professors Samarendra Nath Roy, Lyle V. Jones, Thelma G. Thurstone, and Dorothy Adkins. Indebtedness is also acknowledged to Dr. Somesh Das Gupta who was quite helpful during the initial stage of the study.Formerly at the Department of Psychology, Indiana University. The author is grateful both to Indiana University and University of North Carolina for the support extended to him during his doctoral studies.     

A CROSS-CULTURAL STUDY OF SOCIAL DESIRABILITY JUDGMENTS

Etude interculturelle des jugements de “dêsirabilité” sociale. — On compare les estimations faites sur la désirabilité sociale de 143 items de personnalité par 100 étudiants de L'Université de L'Indiana et par 100 étudiants avancés de L'Université de Nagpur. Les deux séries de valeurs corrèllent à .61. Les deux groupes diffèrent significativement dans leurs jugements pour 55 des items. Ces différences peuvent être interprétées selon la manière dont divers aspects du comportement sont considérés par des gens appartenant à des cultures différentes. Les résultats tendent à suggérer que les étudiants indiens mettent fortement L'accent sur le conformisme social, les relations interpersonnelles et une atmosphère saine et paisible, tandis que leurs homologues américains aspirent à obtenir autonomie, pouvoir, succès, bonheur et richesse. Les étudiants américains attribuent également une grande valeur à la plupart des items qui sont en relation avec le désir de réussite. Les résultats sont discutés en référence à des données antérieures.     

Gender Attitudes and Public Opinion Towards Electoral Gender Quotas in Brazil

Research on public opinion towards affirmative action shows that citizens often support the principle of equality while simultaneously rejecting policies that promote it in a pattern described as the “principle-policy puzzle.” The scholarship also shows that ideology and prejudice towards the targeted group explain the puzzle with respect to racial affirmative action. In this article, we use unique survey questions included in the 2014 round of the AmericasBarometer in Brazil to show that citizens tend to support electoral gender quotas while rejecting gender-based egalitarianism in a reversed version of the “principle-policy puzzle.” We argue that a different type of gender attitudes, namely benevolent sexism, shapes support for gender quotas as well as for the principle of equality. While benevolent sexists tend to reject gender equality based on views about gender complementarity and stereotypes about women's purity, they also support quotas as policies to foster such values. Our findings suggest that even though the political and scholarly debates can provide sound normative reasons for the adoption of quotas across different contexts, public support for them often relies on paternalistic views and expectations about the role of women in politics.     

Technical Knowledge,Prosocial Knowledge,and Clinical Performance of Indian Medical Students

We cross‐culturally replicated and extended findings reported by Kell, Motowidlo, Martin, Stotts, and Moreno that technical knowledge and prosocial knowledge have independent effects on performance. In a sample of 196 Indian medical students, we found that prosocial knowledge explains variance in students' clinical performance beyond the variance explained by technical knowledge and technical knowledge explains variance in clinical performance beyond the variance explained by prosocial knowledge. Contrary to findings that American medical students' prosocial inclinations, as reflected in measures of empathy, seem to decline over the course of their medical training (e.g., Hojat, Vergare, Maxwell, Brainard, Herrine, and Isenberg), we found that Indian medical students' prosocial knowledge steadily increased from their third to fifth years of medical study.     

A note on distributional properties of the Jöreskog-Sörbom fit indices

In introducing the LISREL model for systems of linear structural equations, Jöreskog and Sörbom proposed two goodness-of-fit indices, GFI and AGFI. Their asymptotic distributions and some statistical properties are discussed.The authors would like to acknowledge the helpful comments and suggestions from the Associate Editor and two anonymous reviewers.     

Some Effects of Brief Training Interventions on Perceptions of Sexual Harassment1

In 2 experiments, college undergraduates received brief sexual harassment training or were assigned to a control group; all participants then judged whether sexual harassment occurred in brief written scenarios which had been evaluated previously by experts. In the first study, training increased the tendency to perceive sexual harassment but did not enhance expertise. In the second experiment, training significantly increased perceptual expertise for men but not for women—thereby eliminating a gender difference which has been consistently reported in the sexual harassment literature. These are the first experimental demonstrations that training can influence perceptions of sexual harassment in a laboratory setting; whether training can measurably affect the perception, reporting, or incidence of sexual harassment in real life is not yet known.     

Spontaneous object recognition in capuchin monkeys: assessing the effects of sex,familiarization phase and retention delay

Animal Cognition - The spontaneous object recognition (SOR) task is a versatile and widely used memory test that was only recently established in nonhuman primates (marmosets). Here, we extended...