6. Measures of performance in school from included studies.

Measure	Description	Numbder of studies	Ratings
			Teacher	Parent	Child	Observer
Classroom Performance Survey (CPS)	Five‐point Likert scale, ranging from one (always) to five (never); higher scores indicate lower performance in school	1	Evans 2016	‐	‐	‐
Conners Behavior Rating Scale (CBRS): Academic Performance Index;	Four‐point rating scale, ranging from zero (not true at all) to three (very much true); higher scores indicate better performance in school	1	Storebø 2012	‐	‐	‐
Social Skills Improvement System (SSIS): Academic Competence Scale	Four‐point scale, ranging from zero (never) to three (almost always); higher scores indicate better performance in school	1	Pfiffner 2016	‐	‐	‐
Academic Performance Rating Scale (APRS)	Five‐point Likert scale, ranging from one (never or poor) to five (very often or excellent); higher scores indicate better performance in school	1	Waxmonsky 2010	‐	‐	‐
Wechsler Individual Achievement Test (WIAT)	WIAT is a clinician‐administered performance test including 16 subtests divided between Oral Reading, Math Fluency and Early Reading Skills; higher scores indicate better performance	1	‐	‐	‐	MTA 1999
German teacher‐rated questionnaire for learning and working behaviour (Arbeitsverhalten Lehrer)	German teacher‐rated questionnaire for learning and working behaviour (Arbeitsverhalten Lehrer is a teacher‐rated scale)	1	Lauth 2004	‐	‐	‐