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Development and validation of the Brazilian version of the Attitudes to Aging Questionnaire (AAQ): An example of merging classical psychometric theory and the Rasch measurement model.

Chachamovich E, Fleck MP, Trentini CM, Laidlaw K, Power MJ - Health Qual Life Outcomes (2008)

Bottom Line: Sample was composed of 424 Brazilian old adults, which was compared to an international sample (n = 5238).The final instrument shows excellent psychometric performance (discriminant validity, confirmatory factor analysis and Rasch fit statistics).Rasch analysis indicated that modifications in the response scale and item deletions improved the initial solution derived from the classic approach.

View Article: PubMed Central - HTML - PubMed

Affiliation: Post-Graduate Program of Psychiatry, Universidade Federal do Rio Grande do Sul, Brazil. echacha.ez@terra.com.br

ABSTRACT

Background: Aging has determined a demographic shift in the world, which is considered a major societal achievement, and a challenge. Aging is primarily a subjective experience, shaped by factors such as gender and culture. There is a lack of instruments to assess attitudes to aging adequately. In addition, there is no instrument developed or validated in developing region contexts, so that the particularities of ageing in these areas are not included in the measures available. This paper aims to develop and validate a reliable attitude to aging instrument by combining classical psychometric approach and Rasch analysis.

Methods: Pilot study and field trial are described in details. Statistical analysis included classic psychometric theory (EFA and CFA) and Rasch measurement model. The latter was applied to examine unidimensionality, response scale and item fit.

Results: Sample was composed of 424 Brazilian old adults, which was compared to an international sample (n = 5238). The final instrument shows excellent psychometric performance (discriminant validity, confirmatory factor analysis and Rasch fit statistics). Rasch analysis indicated that modifications in the response scale and item deletions improved the initial solution derived from the classic approach.

Conclusion: The combination of classic and modern psychometric theories in a complementary way is fruitful for development and validation of instruments. The construction of a reliable Brazilian Attitudes to Aging Questionnaire is important for assessing cultural specificities of aging in a transcultural perspective and can be applied in international cross-cultural investigations running less risk of cultural bias.

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Related in: MedlinePlus

CFA model for the Brazilian sample (n = 424).
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Related In: Results  -  Collection

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Figure 3: CFA model for the Brazilian sample (n = 424).

Mentions: The final 24-item version was also tested in the Brazilian dataset, according to the structure illustrated in Figure 3.


Development and validation of the Brazilian version of the Attitudes to Aging Questionnaire (AAQ): An example of merging classical psychometric theory and the Rasch measurement model.

Chachamovich E, Fleck MP, Trentini CM, Laidlaw K, Power MJ - Health Qual Life Outcomes (2008)

CFA model for the Brazilian sample (n = 424).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2262063&req=5

Figure 3: CFA model for the Brazilian sample (n = 424).
Mentions: The final 24-item version was also tested in the Brazilian dataset, according to the structure illustrated in Figure 3.

Bottom Line: Sample was composed of 424 Brazilian old adults, which was compared to an international sample (n = 5238).The final instrument shows excellent psychometric performance (discriminant validity, confirmatory factor analysis and Rasch fit statistics).Rasch analysis indicated that modifications in the response scale and item deletions improved the initial solution derived from the classic approach.

View Article: PubMed Central - HTML - PubMed

Affiliation: Post-Graduate Program of Psychiatry, Universidade Federal do Rio Grande do Sul, Brazil. echacha.ez@terra.com.br

ABSTRACT

Background: Aging has determined a demographic shift in the world, which is considered a major societal achievement, and a challenge. Aging is primarily a subjective experience, shaped by factors such as gender and culture. There is a lack of instruments to assess attitudes to aging adequately. In addition, there is no instrument developed or validated in developing region contexts, so that the particularities of ageing in these areas are not included in the measures available. This paper aims to develop and validate a reliable attitude to aging instrument by combining classical psychometric approach and Rasch analysis.

Methods: Pilot study and field trial are described in details. Statistical analysis included classic psychometric theory (EFA and CFA) and Rasch measurement model. The latter was applied to examine unidimensionality, response scale and item fit.

Results: Sample was composed of 424 Brazilian old adults, which was compared to an international sample (n = 5238). The final instrument shows excellent psychometric performance (discriminant validity, confirmatory factor analysis and Rasch fit statistics). Rasch analysis indicated that modifications in the response scale and item deletions improved the initial solution derived from the classic approach.

Conclusion: The combination of classic and modern psychometric theories in a complementary way is fruitful for development and validation of instruments. The construction of a reliable Brazilian Attitudes to Aging Questionnaire is important for assessing cultural specificities of aging in a transcultural perspective and can be applied in international cross-cultural investigations running less risk of cultural bias.

Show MeSH
Related in: MedlinePlus