Quality of intervention delivery: “Lesson observation by the study personnel indicated that the teachers in the multicultural condition implemented the kiR intervention with both high quality (organization, preparation, student participation, student enjoyment, etc.) and fidelity (of instruction, video presentation, student practice, and homework) . Teachers implementing the kiR intervention self-reported presentation of all program lessons and activities”
Statistical quality:
Was a power computation performed? No.
Was an intention-to-treat analysis performed? Not, but authors state used multiple im- putation NORM software for missing data
Was a correction for clustering made? Yes, Stata complex survey sample routines to account for ICCs in classes
Were appropriate statistical methods used? Stata survey programme for %s, means and SEs and complex survey sample routines to account for ICCs in classes; multiple impu- tation NORM software control for imputed data; linear mixed effects regression