Taxicab Correspondence Analysis

Taxicab correspondence analysis is based on the taxicab singular value decomposition of a contingency table, and it shares some similar properties with correspondence analysis. It is more robust than the ordinary correspondence analysis, because it gives uniform weights to all the points. The visual map constructed by taxicab correspondence analysis has a larger sweep and clearer perspective than the map obtained by correspondence analysis. Two examples are provided. This research was financed by the Natural Sciences and Engineering Research Council of Canada. The author thanks Serge Vienneau for his help regarding the graphical displays, and also thanks the editor, associate editor, and two reviewers for their constructive comments.     

Component Models for Fuzzy Data

The fuzzy perspective in statistical analysis is first illustrated with reference to the “Informational Paradigm” allowing us to deal with different types of uncertainties related to the various informational ingredients (data, model, assumptions). The fuzzy empirical data are then introduced, referring to J LR fuzzy variables as observed on I observation units. Each observation is characterized by its center and its left and right spreads (LR₁ fuzzy number) or by its left and right “centers” and its left and right spreads (LR₂ fuzzy number). Two types of component models for LR₁ and LR₂ fuzzy data are proposed. The estimation of the parameters of these models is based on a Least Squares approach, exploiting an appropriately introduced distance measure for fuzzy data. A simulation study is carried out in order to assess the efficacy of the suggested models as compared with traditional Principal Component Analysis on the centers and with existing methods for fuzzy and interval valued data. An application to real fuzzy data is finally performed. We would like to express our gratitude to the Editor, the Associate Editor, and the Referees whose comments and suggestions improved significantly the quality of the paper.     

Characterization of aggressive behavior and phenytoin response

Recent work has suggested that the success of pharmacological treatment for chronic aggressive behavior may depend, in part, on the subtype of aggressive behavior displayed (e.g. reactive, impulsive aggression vs. predatory, premeditated aggression). The present study examined the usefulness of characterizing aggressive behavior during a 16‐week double‐blind crossover study of phenytoin (PHT) treatment in 41 aggressive adult males. The Impulsive/Premeditated Aggression Scales (IPAS) were used to characterize aggressive behavior as predominantly impulsive or predominantly premeditated in nature. Analyses indicated that participants who did not respond to PHT treatment endorsed significantly more premeditated characteristics on the IPAS than those who responded to PHT treatment. Non‐responders also exhibited fewer aggressive outbursts during placebo treatment, suggesting a greater level of behavior control. Participants who did not complete the study were younger, endorsed significantly more premeditated aggression characteristics and reported more lifetime antisocial behaviors than those who completed the study. Taken together, these data emphasize several factors that may influence the success of pharmacological treatment in aggressive individuals, namely the importance of characterizing the predominant type of problem aggressive behavior. Aggr. Behav. 00:1–6, 2005. © 2005 Wiley‐Liss, Inc.     

Broadcasting of violence on Spanish television: a quantitative panorama

A quantitative analysis of broadcasted violence by the main television (TV) channels transmitting for Madrid (Spain) was carried out using a novel method that randomly selects fragments of delimited duration from TV broadcasts. The device selects acts of aggression shown in those TV extracts, and classifies them according to their type. There was a high incidence of aggressive acts, especially physical (particularly leading to death), in TV fiction: films, serials and promos. The device also allowed examination of the prominence of aggression in children's programs, as well as showing minimal variation in the number of aggressive acts over screened time intervals. The pattern of the collected data suggests that the broadcasting of violence on TV emphasizes the conflicting elements of social reality, reproducing it in fiction, news reports and children's shows. Aggr. Behav. 32:137–145. 2006. © 2006 Wiley‐Liss, Inc.     

A Brief Scale for Measuring “Behavioral Inhibition to the Unfamiliar” in Children

The behavioral inhibition scale (BIS) is a brief rating scale for measuring behavioral inhibition in children. The present study examined the test–retest stability of the BIS in a sample of 7–12-year-olds consisting of inhibited and non-inhibited children (N = 83). Results demonstrated that the BIS scores were fairly stable over a 2-year period, with a test–retest correlation of .77. Further, the BIS scores of inhibited children significantly increased over the 2-year period, whereas those of the non-inhibited comparison group significantly decreased. Finally, the BIS was in a theoretically meaningful way associated with temperamental traits as measured by the Rothbart scales. Altogether, these results provide support for the reliability and validity of the BIS.     

Expected consequences of anger‐related behaviours

In a study with 140 participants (66 men, 74 women), we investigated behaviour outcome expectancies (cognitive, affective and relational) regarding a broad group of anger‐related behaviours (e.g. hit someone, run away). Results of a three‐mode component analysis indicated that behaviour outcome expectancies vary considerably, depending on the behaviour (aggressive versus nonaggressive ones), the consequence (consequences related to the self versus consequences for the anger) and the individual. The findings are discussed in the context of catharsis theory, emotion regulation and functionalistic accounts of emotion‐related behaviour. Copyright © 2006 John Wiley & Sons, Ltd.     

Personality and team performance: a meta‐analysis

Using a meta‐analytical procedure, the relationship between team composition in terms of the Big‐Five personality traits (trait elevation and variability) and team performance were researched. The number of teams upon which analyses were performed ranged from 106 to 527. For the total sample, significant effects were found for elevation in agreeableness (ρ = 0.24) and conscientiousness (ρ = 0.20), and for variability in agreeableness (ρ = ?0.12) and conscientiousness (ρ = ?0.24). Moderation by type of team was tested for professional teams versus student teams. Moderation results for agreeableness and conscientiousness were in line with the total sample results. However, student and professional teams differed in effects for emotional stability and openness to experience. Based on these results, suggestions for future team composition research are presented. Copyright © 2006 John Wiley & Sons, Ltd.     

Transcending a Differend: Studying Therapeutic Processes Conversationally

Studies of actual conversational behaviours used to generate positive change in family therapy are relatively rare. In this study such conversational details were examined as they occurred in a single session of family therapy. With passages identified by family members as helpful, discursive methods of analysis (conversation analysis and critical discourse analysis) were used to examine an actual conversation between a renowned family therapist (Karl Tomm) and a family formerly at a conversational impasse. Conversational practices and sequences in talk used by the therapist and family members to bridge these differences in their ways of relating are discussed.     

Researching psychotherapy integration: A heuristic approach

Moustakas argues that questions and methodology in heuristic research flow out of inner awareness, meaning and inspiration. The approach might arguably embrace a combination of qualitative research methods, and constitute a kind of bricolage. This paper describes a heuristic enquiry into psychotherapy integration that used such a combination of methods – an interpretative phenomenological approach, case studies, reflexive action, and writing. It demonstrates how each of these methods contributed to the six phases of heuristic enquiry, from the initial engagement with psychotherapy as a trainee to the creative synthesis of published works and a PhD thesis, together with some reflection on the enquiry's limitations and rigour. Published texts, training, clinical practice and reflexivity constituted the material from which a new organizing framework for understanding psychotherapy integration was formulated. The author reflects on how the research design allowed deep engagement with this material, and changed his perspective of psychotherapy integration. In conclusion, this paper suggests that both psychotherapy integration and heuristic enquiry can only be conducted on an individual and personal basis, and that it is the quality of the relationship, with the client, or the research material, that produces results.