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<p>The aim of this study was to develop and validate the Generalized Anxiety Scale for Adults (EAG-A). The first study focused on establishing content validity. Three PhDs in mental health acted as judges, leading to adjustments in nine items to enhance clarity and comprehension. The second study assessed validity through internal structure and analyzed DIF by sex. A sample of 653 adults from various regions of Brazil was used. Exploratory Graph and Factor Analyses were conducted to determine the number of factors and verify the internal structure. The results indicated a final version of the scale with 63 items explained by one general and six specific factors (Restlessness, Difficulty Concentrating, Irritability, Sleep Difficulties, Worrying Thoughts, Physical Symptoms), with appropriate fit indices (RMSEA: 0.06; CFI: 0.955; TLI: 0.945). The DIF analysis by sex confirmed the scale’s invariance. Although these findings provide robust evidence for the content validity and internal structure of the EAG-A, it is necessary to highlight that they refer to the Brazilian sample. It is part of the authors’ research agenda to further investigate its cross-cultural validation, ensuring its applicability and generalizability beyond the Brazilian sample.</p>

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Evidence of validity and reliability of the generalized anxiety scale for adults

  • 期刊论文

  • 发表日期：

    2025年4月8日

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  • André Pereira Gonçalves,
  • Henrique Lima Reis,
  • Ciro David Ferraz Domingues,
  • Gabriel Carvalho Franco

摘要

The aim of this study was to develop and validate the Generalized Anxiety Scale for Adults (EAG-A). The first study focused on establishing content validity. Three PhDs in mental health acted as judges, leading to adjustments in nine items to enhance clarity and comprehension. The second study assessed validity through internal structure and analyzed DIF by sex. A sample of 653 adults from various regions of Brazil was used. Exploratory Graph and Factor Analyses were conducted to determine the number of factors and verify the internal structure. The results indicated a final version of the scale with 63 items explained by one general and six specific factors (Restlessness, Difficulty Concentrating, Irritability, Sleep Difficulties, Worrying Thoughts, Physical Symptoms), with appropriate fit indices (RMSEA: 0.06; CFI: 0.955; TLI: 0.945). The DIF analysis by sex confirmed the scale’s invariance. Although these findings provide robust evidence for the content validity and internal structure of the EAG-A, it is necessary to highlight that they refer to the Brazilian sample. It is part of the authors’ research agenda to further investigate its cross-cultural validation, ensuring its applicability and generalizability beyond the Brazilian sample.