Table 2.

Behavioural and adaptive questionnaire measures

Domain	Measure	Description	Cohort
ASD symptomatology	SRS-277	65 items assessing the presence and severity of ASD symptoms including social awareness, social cognition, social communication, social motivation and restricted interests and repetitive behaviour	Y, S
ADHD symptomatology	CADS78	26 items assessing ADHD symptoms of impulsivity/hyperactivity and inattention	Y
	Conners 379	110 items assessing ADHD symptom and comorbid disorders including oppositional defiant and conduct problems, executive functions, learning problems, peer relations and defiance/aggression	S
Executive function	BRIEF-Preschool80	63 items assessing executive functions within the home environment, including working memory, mental set shifting, response inhibition, emotional control and planning/organisation	Y
	BRIEF81	86 items assessing executive functions in the home environment, including working memory, mental set shifting, response inhibition, emotional control, planning/organisation, organisation of materials, initiation and behaviour monitoring	S
Adaptive functioning	ABAS-3: 0–5 years82	241 items assessing adaptive functioning skills, including communication, community use, preacademics, home living, health and safety, leisure, self-care, self-direction and social abilities	Y
	ABAS-3: 5–21 years82	232 items assessing adaptive functioning skills, including communication, community use, functional academics, home living, health and safety, leisure, self-care, self-direction and social abilities	S
Social skills	SSIS Rating Scale83	79 items assessing social skills, problem behaviours and academic competence	Y, S
Sensory processing	Sensory Profile 284	86 items assessing sensory processing, including auditory, visual, taste/smell, movement, body position, touch, plus behavioural skills including activity levels and emotional/social skills	Y, S
Behavioural, emotional, social problems	CBCL: 1.5–5 years85	100 items assessing internalising and externalising problems, emotional reactivity, anxiety/depression, somatic complaints, withdrawal, sleep problems, attention problems and aggressive behaviours	Y
	CBCL: 6–18 years86	113 items assessing internalising and externalising problems, emotional reactivity, anxiety/depression, somatic complaints, withdrawal, sleep problems, attention problems and aggressive behaviours	S
Pragmatic language	CCC-287	70 items assessing speech, syntax, semantics, coherence, inappropriate initiation, stereotyped language, use of context, non-verbal communication, social relations and interests	Y, S

ABAS-3, adaptive behaviour assessment system, 3rd edition; ADHD, attention deficit/hyperactivity disorder; BRIEF, behavior rating inventory of executive functions; CADS, Conners’ attention deficit hyperactivity disorder scales; CBCL, child behavior checklist; CCC-2, children’s communication checklist, 2nd edition; SRS-2, Social Responsiveness Scale, 2nd edition; SSIS, social skills improvement system.