Evidence of validity and reliability of the adaptive functioning scale for intellectual disability (EFA-DI)

• Main Authors: Thais Selau, Mônia Aparecida da Silva, Euclides José de Mendonça Filho, Denise Ruschel Bandeira
• Format: Article
• Language: English
• Published: SpringerOpen 2020-10-01
• Series: Psicologia: Reflexão e Crítica
• Subjects: Adaptive functioning; Intellectual disability; Assessment; Test construction
• Online Access: http://link.springer.com/article/10.1186/s41155-020-00164-7

Abstract Intellectual disability (ID) is a developmental disorder characterized by deficits in intellectual functioning and adaptive behavior. The fifth edition of the Diagnostic and statistical manual of mental disorders (DSM-5) defines adaptive functioning as a severity measure of ID. The availability of tests in the international context to assess this construct has increased in recent years. In Brazil, however, non-systematic assessment of adaptive functioning, such as through observation and interviews, still predominates. The Escala de Funcionamento Adaptativo para Deficiência Intelectual EFA-DI [Adaptive Functioning Scale for Intellectual Disabilities] is a new instrument developed in Brazil to assess the adaptive functioning of 7- to 15-year-old children and support the diagnosis of ID. This study’s objectives were to investigate evidence of validity related to the EFA-DI’s internal structure, criterion validity, and reliability. The psychometric analyses involved two statistical modeling types, confirmatory factor analysis (CFA) and item response theory analysis (IRT). These results highlight the EFA-DI scale’s strong psychometric properties and support its use as a parental report measure of young children’s adaptive functioning. Future studies will be conducted to develop norms of interpretation for the EFA-DI. This study is expected to contribute to the fields of psychological assessment and child development in Brazil.