Table 2.

Variable definitions

Variable	Definition
Age	Mean age of participants (years)
Dose	Total dose: total hours of intervention Duration: total number of weeks of intervention
Person implementing	Clinician: intervention directly implemented by the researcher or therapist Parent: parent implemented part or all of the intervention School staff: any school employee implemented part or all of the intervention
Measurement type	Context bound: outcome was measured with the same person and in the same context (setting and materials) as the intervention was conducted Semi-generalized: outcome was measured with the same person and in a different context (setting and materials) as the intervention was conducted Generalized: outcome was measured with a different person and in a different context (setting and materials) as the intervention was conducted