Generalization of the Brown-Forsythe approach to factorial designs

The current paper proposes a solution that generalizes ideas of Brown and Forsythe to the problem of comparing hypotheses in two-way classification designs with heteroscedastic error structure. Unlike the standard analysis of variance, the proposed approach does not require the homogeneity assumption. A comprehensive simulation study, in which sample size of the cells, relationship between the cell sizes and unequal variance, degree of variance heterogeneity, and population distribution shape were systematically manipulated, shows that the proposed approximation was generally robust when normality and heterogeneity were jointly violated.     

Latinos and latinas in community psychology: A review of the literature

Latinos and Latinas are one of the largest minority groups in the United States yet they remain a silent group. The article begins by considering the social, historical, and economic backgrounds of Latino and Latina groups in the U.S. as a context for understanding diversity and as a resource for explaining the participation of this minority group in community psychology. This article then examines the extent to which Latinos and Latinas are present and participate in community psychology throughout its publications and explores the nature of their participation through a thematic analysis of the published literature. A content analysis was conducted on 1,851 articles published from 1973 through 1992 in theAmerican Journal of Community Psychology and theJournal of Community Psychology to evaluate the presence of Latinos and Latinas in the community psychology literature. The quantitative analysis revealed that 3.7% (n=69) of all the articles reviewed focused on Latinos and Latinas or had samples with at least 15% of the participants coming from this ethnic group. Mexican Americans/Chicanos were the focus of the largest number of articles about specific Latino and Latina subgroups, followed by Cubans and Puerto Ricans. The results indicated less attention to Latino and Latina populations in the community psychology literature than would be expected from the field's goals. However, a qualitative review of the articles was more encouraging since many articles by and about Latinos and Latinas reflected values consonant with the field such as cultural pluralism or employed conceptual tools of the discipline such as empowerment or ecological approaches. Nevertheless, some of the articles reviewed also lacked a concern for the field's values in relation to Latinos and Latinas as a group. Finally, suggestions and strategies to empower this group are offered.     

Prevention of depression with primary care patients: A randomized controlled trial

The prevention of major depression is an important research goal which deserves increased attention. Depressive symptoms and disorders are particularly common in primary care patients and have a negative impact on functioning and well-being comparable with other major chronic medical conditions. The San Francisco Depression Prevention Research project conducted a randomized, controlled, prevention trial to demonstrate the feasibility of implementing such research in a public sector setting serving low-income, predominantly minority individuals: 150 primary care patients free from depression or other major mental disorders were randomized to an experimental cognitive-behavioral intervention or to a control condition. The experimental intervention group reported a significantly greater reduction in depressive levels. Decline in depressive levels was significantly mediated by decline in the frequency of negative conditions. Group differences in the number of new episodes (incidence) of major depression did not reach significance during the 1-year trial. We conclude that depression prevention trials in public sector primary care settings are feasbile, and that depressive symptoms can be reduced even in low-income, minority populations. To conduct randomized prevention trials that can test effects on incidence with sufficient statistical power, subgroups at greater imminent risk have to be identified.     

Robust tests for multivariate factorial designs under heteroscedasticity

The question of how to analyze several multivariate normal mean vectors when normality and covariance homogeneity assumptions are violated is considered in this article. For the two-way MANOVA layout, we address this problem adapting results presented by Brunner, Dette, and Munk (BDM; 1997) and Vallejo and Ato (modified Brown-Forsythe [MBF]; 2006) in the context of univariate factorial and split-plot designs and a multivariate version of the linear model (MLM) to accommodate heterogeneous data. Furthermore, we compare these procedures with the Welch-James (WJ) approximate degrees of freedom multivariate statistics based on ordinary least squares via Monte Carlo simulation. Our numerical studies show that of the methods evaluated, only the modified versions of the BDM and MBF procedures were robust to violations of underlying assumptions. The MLM approach was only occasionally liberal, and then by only a small amount, whereas the WJ procedure was often liberal if the interactive effects were involved in the design, particularly when the number of dependent variables increased and total sample size was small. On the other hand, it was also found that the MLM procedure was uniformly more powerful than its most direct competitors. The overall success rate was 22.4% for the BDM, 36.3% for the MBF, and 45.0% for the MLM.     

Vultures as an overlooked model in cognitive ecology

Animal Cognition - Despite important recent advances in cognitive ecology, our current understanding of avian cognition still largely rests on research conducted on a few model taxa. Vultures are...     

Regional conferences—A capacity‐building mandate: Report on CRCP2011—Building Bridges and Building a Regional Structure

The Caribbean Regional Conference of Psychology was held in Nassau, The Bahamas, from 15 to 18 November 2011, under the auspices of the International Association of Applied Psychology (IAAP), the International Union of Psychological Science (IUPsyS), and the International Association for Cross‐Cultural Psychology (IACCP). The conference was hosted by the Bahamas Psychological Association, and organized by a committee chaired by Dr Ava Thompson, College of the Bahamas. The CRCP2011 attracted over 400 participants from 37 countries, including 20 nations/territories in the Caribbean. A broad scientific program, organized around six conference themes, addressed strengths and challenges to psychology in the region; the current state of psychological research, assessment, and intervention; historical, cultural, and language influences; and links between Caribbean and global models. Conference outcomes included planning for a series of publications to expand on conference themes and presentations, as well as establishment of a steering group to launch a regional organization to support the science and practice of psychology in the Caribbean.     

Contours for a Public Lutheran Theology in the Face of Empire

Abstract : Three themes structure Lutheranism's interpretation of the biblical narrative as it intersects with the present challenges of Empire: justification by faith as a declaration of inclusiveness; God's threefold‐multidimensional action creating and sustaining democratic practices (two kingdoms); and the cross as the critical ‘weapon’ against the ‘glory’ of Empire. This implies placing our theology within the present cultural and religious debate in a way consistent with the methodology of the cross: a theology done from the bowels of Empire, revealing its true face behind its alleged ‘benevolent’ mask.     

Language Shift and the Inclusion of Indigenous Populations in Large-Scale Assessment Programs

Indicators of academic achievement for bilingual students can be inaccurate due to linguistic heterogeneity. For indigenous populations, language shift (the gradual replacement of one language by another) is a factor that can increase this heterogeneity and poses an additional challenge for valid testing. We investigated whether and how indigenous populations can be validly included in a large-scale assessment program. We gave Mexican preschool Mayan students aged 5 to 6 years the same set of mathematics items in three versions: (1) original in Spanish, (2) Mayan translation, and (3) content equivalent, developed from scratch in Mayan. Also, we collected information on the students’ and the teachers’ use of Spanish and Mayan, and on the communities’ support of the two languages. Students performed poorly on the three versions. Generalizability theory-based analyses revealed considerable performance inconsistency across items and language versions and low generalizability and dependability coefficients. This performance instability appears to stem from a dwindling support of the Mayan language in Mayan schools and communities. Fair, valid assessment of indigenous populations in either their languages or their countries’ dominant languages appears to be difficult to accomplish with current testing models and policies.     

Individual and group CBT and IPT for Puerto Rican adolescents with depressive symptoms

This study compared individual (I) to group (G) formats of cognitive-behavioral therapy (CBT) and interpersonal psychotherapy (IPT) for the treatment of depression in adolescents. One hundred and 12 Puerto Rican adolescents were randomized to four conditions (CBT-I, CBT-G, IPT-I, IPT-G). Participants were assessed at pretreatment and posttreatment with structured interviews to establish diagnosis and with self-report measures to assess treatment outcome. The results suggest that CBT and IPT are robust treatments in both group and individual formats. However, CBT produced significantly greater decreases in depressive symptoms and improved self-concept than IPT. The implications of these findings are discussed.