A new approach for differential item functioning detection using Mantel-Haenszel methods. The GMHDIF program

To date, the statistical software designed for assessing differential item functioning (DIF) with Mantel-Haenszel procedures has employed the following statistics: the Mantel-Haenszel chi-square statistic, the generalized Mantel-Haenszel test and the Mantel test. These statistics permit detecting DIF in dichotomous and polytomous items, although they limit the analysis to two groups. On the contrary, this article describes a new approach (and the related software) that, using the generalized Mantel-Haenszel statistic proposed by Landis, Heyman, and Koch (1978), permits DIF assessment in multiple groups, both for dichotomous and polytomous items. The program is free of charge and is available in the following languages: Spanish, English and Portuguese.     

When group membership gets personal: a theory of identity fusion

Identity fusion is a relatively unexplored form of alignment with groups that entails a visceral feeling of oneness with the group. This feeling is associated with unusually porous, highly permeable borders between the personal and social self. These porous borders encourage people to channel their personal agency into group behavior, raising the possibility that the personal and social self will combine synergistically to motivate pro-group behavior. Furthermore, the strong personal as well as social identities possessed by highly fused persons cause them to recognize other group members not merely as members of the group but also as unique individuals, prompting the development of strong relational as well as collective ties within the group. In local fusion, people develop relational ties to members of relatively small groups (e.g., families or work teams) with whom they have personal relationships. In extended fusion, people project relational ties onto relatively large collectives composed of many individuals with whom they may have no personal relationships. The research literature indicates that measures of fusion are exceptionally strong predictors of extreme pro-group behavior. Moreover, fusion effects are amplified by augmenting individual agency, either directly (by increasing physiological arousal) or indirectly (by activating personal or social identities). The effects of fusion on pro-group actions are mediated by perceptions of arousal and invulnerability. Possible causes of identity fusion--ranging from relatively distal, evolutionary, and cultural influences to more proximal, contextual influences--are discussed. Finally, implications and future directions are considered.     

Incidental retrieval-induced forgetting of location information

Retrieval-induced forgetting (RIF) has been studied with different types of tests and materials. However, RIF has always been tested on the items' central features, and there is no information on whether inhibition also extends to peripheral features of the events in which the items are embedded. In two experiments, we specifically tested the presence of RIF in a task in which recall of peripheral information was required. After a standard retrieval practice task oriented to item identity, participants were cued with colors (Exp. 1) or with the items themselves (Exp. 2) and asked to recall the screen locations where the items had been displayed during the study phase. RIF for locations was observed after retrieval practice, an effect that was not present when participants were asked to read instead of retrieving the items. Our findings provide evidence that peripheral location information associated with an item during study can be also inhibited when the retrieval conditions promote the inhibition of more central, item identity information.     

Psychometric properties of the Spanish Human System Audit Short-Scale of transformational leadership

The aim of this research is to examine the psychometric properties of a Spanish version of the Human System Audit transformational leadership short-scale (HSA-TFL-ES). It is based on the concept of Bass developed in 1985. The HSA-TFL is a part of the wider Human System Audit frame. We analyzed the HSA-TFL-ES in five different samples with a total number of 1,718 workers at five sectors. Exploratory Factor Analysis corroborated a single factor in all samples that accounted for 66% to 73% of variance. The internal consistency in all samples was good (alpha = .92 - .95). Evidence was found for the convergent validity of the HSA-TFL-ES and the Multifactor Leadership Questionnaire. These results suggested that the HSA-TFL short-scale is a psychometrically sound measure of this construct and can be used for a combined and first overall measurement.     

Clinical utility of the Bem Sex Role Inventory (BSRI) in the Spanish transsexual and nontranssexual population

The aim of the study is to evaluate the usefulness of the Bem Sex Role Inventory (BSRI; Bem, 1974), an overall measurement of the cultural construct of masculinity and femininity, in the psychological assessment of Spanish transsexuals. Seventy male-to-female transsexuals (MF), 51 female-to-male transsexuals (FM), 77 control men, and 79 control women completed the Spanish version of the BSRI. Statistically significant differences between groups were only found on the femininity scale, on which MF transsexuals and control women scored significantly higher than FM transsexuals and control men. The results indicate that (a) only the femininity scale of the BSRI appears to be useful today for evaluating differences in the sex-role identification in Spanish controls and transsexuals; and (b) MF and FM transsexuals score as a function of their gender identity instead of their anatomical sex on the BSRI femininity scale.     

Editorial

Addressing the issues of intersubjectivity and hermenutics and their relevance for psychoanalysis, the author presents a model for interpreting inspired by the existential hermeneutics of Martin Heidegger. This analysis is then applied to the clinical reality of the psychoanalytical situation. The author discusses the matrix of transference, the analytical dialogue as a form of reflection, the functions of hope and faith, and lastly, truth as faithfulness in the hermeneutic context.     

A regression tree of the aptitudes,personality, and academic performance relationship

This study suggests regression trees as a complementary tool to regression and SEM to respond to questions related with the influence of intelligence, personality, and their interplay on academic performance. Data from 818 secondary education students (402 girls and 416 boys) in aptitudes, personality, and academic performance in four learning areas: language (Catalan and Spanish) and science (Natural and Mathematics) were modelled with this technique. Two hypotheses articulated the presentation of this methodology. Aptitudes were much more relevant than personality to explain variance in academic performance. Verbal aptitude was particularly more relevant for girls than for boys.     

Bibliometric Review of the Repertory Grid Technique: 1998–2007

This bibliometric review covers the scientific production with or about the repertory grid technique (RGT; Kelly, 1955/1991) between 1998 and 2007. An analysis of previous reviews suggests the need for a more careful and broad process of bibliographic research. With this aim, 24 bibliographic sources were used to cover a wide range of specialties. We began by drawing up an explicit protocol in which the research terms were detailed. Then we consulted the bibliographic sources, taking into account a specification of inclusion and exclusion criteria. As a result of this process, 973 references were obtained: 468 journal papers, 335 book chapters, 108 doctoral theses, and 62 books. The review also evaluates the types of documents found, the evolution of the number of works published, the repertory grid's fields of application, and the degree of openness to other disciplines. The most relevant authors, their affiliations, countries, and the publication language are also revealed in this article, as well as the major journals contributing to dissemination of the work done with this technique.     

Viewing Cognitive Conflicts as Dilemmas: Implications for Mental Health

The idea that internal conflicts play a significant role in mental health has been extensively addressed in various psychological traditions, including personal construct theory. In the context of the latter, several measures of conflict have been operationalized using the Repertory Grid Technique (RGT). All of them capture the notion that change, although desirable from the viewpoint of a given set of constructs, becomes undesirable from the perspective of other constructs. The goal of this study is to explore the presence of cognitive conflicts in a clinical sample (n = 284) and compare it to a control sample (n = 322). It is also meant to clarify which among the different types of conflict studied provides a greater clinical value and to investigate its relationship to symptom severity (SCL-90-R). Of the types of cognitive conflict studied, implicative dilemmas were the only ones to discriminate between clinical and nonclinical samples. These dilemmas were found in 34% of the nonclinical sample and in 53% of the clinical sample. Participants with implicative dilemmas showed higher symptom severity, and those from the clinical sample displayed a higher frequency of dilemmas than those from the nonclinical sample.     

Influencia del placebo en el tratamiento de la cefalea

Resumen

El objetivo de este trabajo es estudiar la acción del efecto placebo en el tratamiento de la cefalea mediante biofeedback EMG. Un total de 22 pacientes de cefalea fueron asignados a tres condiciones experimentales: a) biofeedback EMG placebo con control interno; b) biofeedback EMG placebo con control externo; y c) biofeedback EMG real. Los resultados señalan que el biofeedback EMG placebo es tan eficaz como el real para reducir la frecuencia de la cefalea. Se discuten, por último, las distintas variables medidas en el estudio para determinar la naturaleza y eficacia del efecto placebo.