Abstract
AbstractObjectiveThe study aimed to perform confirmatory factor, internal consistency, and differential item functioning analyses of AIS in two Colombian online samples.MethodsTwo samples were recruited online at different times. A secondary validation study was conducted with the participation of adults. The first sample was adults from the general population (n = 700, between 18 and 76 years, M = 37.05, SD = 12.70, and 68% were female adults). The second sample included patients with asthma or chronic obstructive pulmonary disease (n = 292, between 18 and 96 years (M = 60.44, SD = 17.57, and 64.73% were female). Separated confirmatory factor analyses and Cronbach’s alpha and McDonald’s omega were computed for each factor. Moreover, gender DIF was calculated using Kendall’s tau.ResultsThe data adjusted better for the AIS two-dimensional model in the general population sample (chi-squared of 111.25 [df of 19, p < .001], RMSEA of .08, CFI of .96, TLI of .95, and SRMR of .04) and the clinical sample (chi-squared of 96.83 [df of 19, p < .001], RMSEA of .12, CFI of .94, TLI of .91, and SRMR of .05). The internal consistency was high, both Cronbach alpha and McDonald’s omega of .88 in the general population sample, and Cronbach’s alpha of .85 and McDonald’s omega of .88 in the clinical sample. Gender non-differential item functioning was not found among any sample.ConclusionsAIS shows a two-dimensional structure, high internal consistency, and gender non-differential item functioning in two online samples in Colombia. It is necessary to corroborate these findings in other samples.
Publisher
Cold Spring Harbor Laboratory