Teacher and Self-Report Forms of the BRIEF2: Psychometric data in Portuguese children and adolescents

The BRIEF2 Teacher and Self-Report Forms are analyzed regarding their psychometric properties in representative Portuguese samples. The analyses addressed reliability (internal consistency, test-retest, and interrater reliability) and construct validity (confirmatory factor analysis and measurement invariance). Participants were 1097 Portuguese children and adolescents (<i>n</i> = 582 girls and <i>n</i> = 515 boys) from 6 to 18 years old assessed by teachers (Teacher Form), and 906 Portuguese children and adolescents (<i>n</i> = 486 girls and <i>n</i> = 420 boys) from 10 to 18 years old (Self-Report Form). Internal consistency was adequate for the Teacher Form (.842 to .973) and the Self-Report Form (.706 to .942). The test-retest reliability coefficients ranged from .68 to .92 in the Teacher Form, and from .70 to .88 in the Self-Report Form. The correlation coefficients between Teacher and Self-Report Forms (interrater reliability) were ≤ .29, stressing the importance of different perspectives of executive functions. Regarding construct validity, the clinical scales correlated from .310 to .857 in the Teacher Form and from .414 to .749 in the Self-Report Form. Confirmatory factor analysis confirmed that the three-correlated-factor model evidenced a better fit than other three competing models. Measurement invariance of the three-factor model across sex was established for the Self-Report Form (configural, metric, and partial scalar invariance). Overall, the results indicate that the BRIEF2 Teacher and Self-Report Forms can be considered reliable and valid assessment instruments of executive functions in Portuguese children and adolescents.