This study advanced knowledge of the measurement properties of the Family Leisure Activity Profile (FLAP). The FLAP is a sixteen-item index based on the Core and Balance Model of Family Functioning. This study assessed three distinct scaling techniques using data collected with the FLAP index: Technique 1 consisted of current practice; Technique 2 consisted of an approach based on reinterpretation of the theory underlying the FLAP; and Technique 3 consisted of a reformulated empirical approach that involved converting ordinal data to ratio-level approximations. Analyses were conducted using data from an online sample of 884 United Kingdom (U.K.) households. Two members of each responding household, a child and a parent, completed the FLAP index along with measures of family functioning. Analytic techniques included intra-class correlation, mean absolute deviation, Pearson r, generalizability theory (i.e., G-study and D-study); multitrait-multimethod matrix; and confirmatory factor analysis. Results of analysis using Technique 1 provided support for inter-rater agreement of the FLAP index. Results also suggested acceptable levels of reliability for research purposes and criterion-related evidence of validity. Technique 2 analyses revealed acceptable estimates of reliability and criterion-related validity; additionally, Technique 2 had better empirical fit indices than Technique 1. Results of analyses using Technique 3 provided insight into use of ratio-level data in comparison to ordinal-level data. Technique 3 reliability and validity coefficients decreased appreciably, yet Technique 3 produced the strongest fit indices among the three models.
