The German Focus on the Outcomes of Communication Under Six (FOCUS-G): Reliability and Validity of a Novel Assessment of Communicative Participation

Abstract

Purpose Our purpose was to explore the validity and reliability of the German Focus on the Outcomes of Communication Under Six (FOCUS-G; Thomas-Stonell, Oddson, Robertson, & Rosenbaum, 2010, 2012), which is an authorized adaptation of the Focus on the Outcomes of Communication Under Six (Thomas-Stonell et al., 2010) tool, which measures communicative participation in preschool children. Method Parents of typically developing children (TDC) and of children with speech impairment (CSI) completed the FOCUS-G and the Questionnaire for Measuring Health-Related Quality of Life in Children (KiddyKINDL; Ravens-Sieberer & Bullinger, 2000). To determine test–retest reliability, the FOCUS-G was readministered to a subsample of parents 1 week later. Results The FOCUS-G had high values for internal consistency (α = .959, Ω = .941), test–retest reliability (intraclass correlation coefficient = .974), and split–half reliability ( r = .832). Total scores on the FOCUS-G and KiddyKINDL demonstrated significant associations. FOCUS-G total scores and subdomain scores for both samples showed significant correlations, indicating good construct validity. The discriminatory ability of the FOCUS-G was indicated by significantly higher mean scores for TDC ( M = 6.03, SD = 0.65) than CSI ( M = 5.47, SD = 1.02). Conclusion The overall good psychometric properties of this novel assessment of communicative participation support its use by speech-language pathologists for clinical and research purposes with German-speaking children.