Cross-cultural adaptation and preliminary psychometric properties of the Affective Reactivity Index in Brazilian Youth: implications for DSM-5 measured irritability

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Abstract

Objective: To describe the cross-cultural adaptation of the Affective Reactivity Index (ARI) to Brazilian Portuguese and to investigate preliminary psychometric properties of the adapted version. Methods: Cross-cultural adaptation was based on the investigation of the theoretical and operational equivalences of the original ARI in the Brazilian context, followed by a process of translation, back-translation, and review by a committee of experts. Data analysis was carried out in a community sample of 133 schoolchildren aged 8 to 17 years to investigate the following characteristics of the ARI: 1) factor structure; 2) internal consistency; 3) construct validity comparing differential relationships between irritability and anxiety dimensions and impairment; and 4) item response theory (IRT) parameters. Results: A final Brazilian Portuguese version of the instrument was defined and is presented. Internal consistency was good, and our analysis supported the original single-factor structure of the ARI. Correlations of the ARI with distress-related anxiety dimensions were higher than with phobic-related anxiety dimensions, supporting its construct validity. In addition, higher ARI scores were associated with higher irritability-related impairment. IRT analysis underscored frequency of loss of temper as essential to inform about pathological states of irritability. Conclusion: The Brazilian Portuguese version of the ARI seems to be very similar to the original instrument in terms of conceptual, item, semantic, and operational equivalence. Our preliminary analysis replicates and extends previous evidence confirming promising psychometric properties for the ARI.

Translated abstract

Objetivo: Descrever a adaptação transcultural do Affective Reactivity Index (ARI) para o português do Brasil e investigar propriedades psicométricas preliminares da versão adaptada. Método: A adaptação transcultural foi baseada na investigação das equivalências teórica e operacional da versão original do ARI no contexto brasileiro, seguida do processo de tradução, retrotradução e revisão por comitê de especialistas. A análise dos dados foi realizada em uma amostra comunitária de 133 escolares com idade entre 8 e 17 anos para investigar as seguintes características do ARI: 1) estrutura fatorial; 2) consistência interna; 3) validade do construto, comparando as relações diferenciais entre irritabilidade e as dimensões de ansiedade e prejuízo; e 4) parâmetros de teoria da resposta ao item (TRI). Resultados: Uma versão final em português do Brasil do instrumento foi definida e é apresentada. A consistência interna foi boa, e nossa análise confirmou a estrutura unifatorial original do ARI. As correlações do ARI com as dimensões de ansiedade relacionadas a sofrimento foram maiores do que com as dimensões de ansiedade relacionadas a fobias, reforçando a validade do construto. Além disso, escores mais altos no ARI foram associados a maior prejuízo relacionado à irritabilidade. A análise do TRI enfatizou a frequência de perda de controle como essencial para determinar estados patológicos de irritabilidade. Conclusão: A versão em português do Brasil do ARI parece ser muito semelhante ao instrumento original em termos de equivalência conceitual, de itens, semântica e operacional. Nossa análise preliminar reproduz e estende evidências anteriores que confirmam propriedades psicométricas promissoras para o ARI.

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Cross-cultural adaptation of research instruments: language, setting, time and statistical considerations

Linn Gjersing, John Caplehorn, Thomas Clausen (2010)

Background Research questionnaires are not always translated appropriately before they are used in new temporal, cultural or linguistic settings. The results based on such instruments may therefore not accurately reflect what they are supposed to measure. This paper aims to illustrate the process and required steps involved in the cross-cultural adaptation of a research instrument using the adaptation process of an attitudinal instrument as an example. Methods A questionnaire was needed for the implementation of a study in Norway 2007. There was no appropriate instruments available in Norwegian, thus an Australian-English instrument was cross-culturally adapted. Results The adaptation process included investigation of conceptual and item equivalence. Two forward and two back-translations were synthesized and compared by an expert committee. Thereafter the instrument was pretested and adjusted accordingly. The final questionnaire was administered to opioid maintenance treatment staff (n=140) and harm reduction staff (n=180). The overall response rate was 84%. The original instrument failed confirmatory analysis. Instead a new two-factor scale was identified and found valid in the new setting. Conclusions The failure of the original scale highlights the importance of adapting instruments to current research settings. It also emphasizes the importance of ensuring that concepts within an instrument are equal between the original and target language, time and context. If the described stages in the cross-cultural adaptation process had been omitted, the findings would have been misleading, even if presented with apparent precision. Thus, it is important to consider possible barriers when making a direct comparison between different nations, cultures and times.

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A measure of anxiety symptoms among children.

Susan Spence (1998)

The Spence Children's Anxiety Scale (SCAS) is a child self-report measure designed to evaluate symptoms relating to separation anxiety, social phobia, obsessive-compulsive disorder, panic-agoraphobia, generalized anxiety and fears of physical injury. The results of confirmatory and exploratory factor analyses supported six factors consistent with the hypothesized diagnostic categories. There was support also for a model in which the 1st-order factors loaded significantly on a single 2nd-order factor of anxiety in general. The internal consistency of the total score and subscales was high and 6 month test-retest reliability was acceptable. The SCAS correlated strongly with a frequently used child self-report measure of anxiety. Comparisons between clinically anxious and control children showed significant differences in total SCAS scores, with subscale scores reflecting the type of presenting anxiety disorder of the clinical samples.