SUMMARY
Objective
this study aims to verify the stages of evidence of validity of the voice-adapted
present perceived control scale (V-APPCS) in its translated and cross-culturally adapted
version for the Brazilian Portuguese “Voice-Adapted Present Perceived Control Scale”
and to estimate the psychometric measurements of the properties of its items based
on the item response theory (IRT).
Methods
the instrument underwent a process of translation and cross-cultural adaptation for
the Brazilian Portuguese, the process was carried out by two qualified translators,
native in the destination language, and fluent in the language and culture of origin.
The first translated version of the protocol was forwarded to a back-translation,
performed by a third bilingual Brazilian translator. The translations were analyzed
and compared by a committee composed of five speech therapists who are specialists
in voice and with proficiency in the English language. The empirical study used data
from 168 individuals, 127 had voice problems and 41 vocally healthy ones. For the
stages of validity evidence, the following analyses were performed: Cronbach's alpha,
exploratory factor analysis, confirmatory factor analysis and IRT.
Results
The stages of translation and cross-cultural adaptation allowed linguistic adjustments
to be made so that the items were understandable and suitable for use in Brazil. The
adequacy, structure, and application of the items were confirmed through the application
of the final version of the scale in twenty individuals in a real context. The instrument
in its Brazilian version presented good internal consistency, with bifactorial structure
the exploratory factor analysis, besides presenting satisfactory values in the adjustment
indexes of the model, confirming the structure of the confirmatory factor Analysis.
The IT was applied to evaluate the parameters discrimination (a) and difficulty (b)
of the items of the instrument; item 5 “I have control over my day-to-day reactions
to the voice problem.” Presented itself as a more discriminative item and item 8 “My
reaction to the voice problem is not under my control.” As an item of greater difficulty.
Conclusion
The V-APPCS, translated, cross-culturally adapted, and validated, is robust and adequate
to represent the construct in the Brazilian versions.
Key words
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Article info
Publication history
Published online: March 01, 2023
Accepted:
January 20,
2023
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2023 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
