Comparison of false positive and false negative rates of two indices of individual reliable change: Jacobson-Truax and Hageman-Arrindell methods.

Background: Quantification of change is crucial for correctly estimating the effect of a treatment and for distinguishing random or non-systematic changes from substantive changes. The objective of the present study was to learn about the performance of two distribution-based methods [the Jacobson-Truax Reliable Change Index (RCI) and the Hageman-Arrindell (HA) approach] that were designed for evaluating individual reliable change. Methods: A pre-post design was simulated with the purpose to evaluate the false positive and false negative rates of RCI and HA methods. In this design, a first measurement is obtained before treatment and a second measurement is obtained after treatment, in the same group of subjects. Results: In relation to the rate of false positives, only the HA statistic provided acceptable results. Regarding the rate of false negatives, both statistics offered similar results, and both could claim to offer acceptable rates when Ferguson's stringent criteria were used to define effect sizes as opposed to when the conventional criteria advanced by Cohen were employed. Conclusion: Since the HA statistic appeared to be a better option than the RCI statistic, we have developed and presented an Excel macro so that the greater complexity of calculating HA would not represent an obstacle for the non-expert user.

Validação da versão reduzida da escala de comportamento interpessoal para adolescentes Portugueses / Validation of the short version of the scale for interpersonal behavior for Portuguese adolescents

Este trabalho apresenta a adaptação linguística para português da Escala de Comportamento Interpessoal - versão reduzida, e a avaliação das suas características psicométricas, em uma amostra de adolescentes tardios (dos 16 aos 21 anos; N = 872). Foi encontrada uma organização interna em quatro dimensões e uma medida geral para os dois componentes avaliados: desconforto ao ser assertivo e frequência de prática de comportamento assertivo. Todas as medidas obtiveram valores aceitáveis de consistência interna e níveis moderados de validade por relação com outras variáveis, face à versão reduzida da Escala de Assertividade de Rathus. Algumas diferenças por sexo foram observadas. Este instrumento mostrou-se útil para ser empregado na avaliação e investigação em psicologia. (AU)

This work presents the Portuguese linguistic adaptation of the short version of the Scale for Interpersonal Behavior and the evaluation of its psychometric characteristics using a sample of late adolescents (aged 16 to 21 years; N = 872). An internal organization of four dimensions was found along with a general measure for the two components under evaluation: discomfort while being assertive and frequency of practicing assertive behavior. All measures obtained acceptable internal consistency values and moderate levels of validity based on the relation to other variables, namely the short version of Rathus Assertiveness Scale. Some sex differences were observed. The instrument showed to be useful to be employed for evaluation and research in psychology. (AU)

Taxonicity of anxiety sensitivity: a multi-national analysis.

Taxometric coherent cut kinetic analyses were used to test the latent structure of anxiety sensitivity in samples from North America (Canada and United States of America), France, Mexico, Spain, and The Netherlands (total n = 2741). Anxiety sensitivity was indexed by the 36-item Anxiety Sensitivity Index--Revised (ASI-R; [J. Anxiety Disord. 12(5) (1998) 463]). Four manifest indicators of anxiety sensitivity were constructed using the ASI-R: fear of cardiovascular symptoms, fear of respiratory symptoms, fear of publicly observable anxiety reactions, and fear of mental incapacitation. Results from MAXCOV-HITMAX, internal consistency tests, analyses of simulated Monte Carlo data, and a MAMBAC external consistency test indicated that the latent structure of anxiety sensitivity was taxonic in each of the samples. The estimated base rate of the anxiety sensitivity taxon differed slightly between nations, ranging from 11.5 to 21.5%. In general, the four ASI-R based manifest indicators showed high levels of validity. Results are discussed in relation to the conceptual understanding of anxiety sensitivity, with specific emphasis on theoretical refinement of the construct.

Anxiety sensitivity in six countries.

In the present study, the Anxiety Sensitivity Index-Revised (ASI-R; ) was administered to a large sample of persons (n=2786) from different cultures represented in six different countries: Canada, France, Mexico, The Netherlands, Spain, and the United States. We sought to (a) determine the factor structure and internal consistency of the ASI-R and (b) examine the correlations of the measure with psychiatric symptoms and personality dimensions in a single European non-English speaking country (The Netherlands). Partially consistent with the original hypothesis, the underlying structure of the anxiety sensitivity construct was generally similar across countries, tapping fear about the negative consequences of anxiety-related physical and social-cognitive sensations. Lower-order factors were moderately to strongly correlated with one another and showed good internal consistency. The observed lower-order ASI-R factors correlated with established psychiatric symptoms and with the personality trait of neuroticism. Partial correlations indicated that both factors are useful in accounting for variance in symptom measures. We discuss the results of this investigation in relation to the cross-cultural assessment of the anxiety sensitivity construct.