. Author manuscript; available in PMC: 2021 Jun 1.

Published in final edited form as: J Child Psychol Psychiatry. 2020 Mar 1;61(12):1317–1327. doi: 10.1111/jcpp.13214

Table 2. Child and parent reported questionnaires, key variables and alpha of scale by group.

Questionnaires	Child/parent	Outcome	α (autistic, neurotypical)
Autistic traits
SRS-2	Parent	Autistic traits total score	.94, .97
SCQ-L/C	Parent	Autistic traits lifetime and current scores	-

Mental health

LSAS	Child	Social anxiety total score based on reports of fear and avoidance in social situations	.97, .97

BFNE-S	Child	Straightforward (8 items) total score based on fear of negative evaluation	.94, .94
SMFQ	Child	Depression total	.93, .93
STAI	Child	Trait anxiety total based on how a person generally feels day to day	.90, .93

SDQ	Child/Parent	Conduct total and hyperactivity total (behavioural problems) and emotional total (anxiety and depression)	Child:.57-.76, .65-.80
SDQ	Child/Parent		Parent:.78-.82, .76-.86

Factors
TAS-20	Child	Alexithymia total based on difficulties identifying and describing own emotions	.76, .82
AASP	Child	Hyposensitivity total (low registration, seeking), Hypersensitivity total (sensitivity and avoidance)	.86-.93, .69-.90

IUS	Child/Parent	IU total based on uncertain situations viewed as negative	Child:.87, .89
IUS	Child/Parent	IU total based on uncertain situations viewed as negative	Parent:.96, .85

CERQ	Child	Adaptive ER (e.g. acceptance), Maladaptive ER (e.g. self-blame)	.84-.89, .86-.87
BPQ-Awareness^a	Child	Interoceptive sensibility total based on subjective awareness of one’s own internal states	.96, .96

Notes: ^aThrough piloting the Body Perception Questionnaire with neurotypical children (n=3), it became apparent that some items were difficult to interpret. For these items, an easier alternative was made available (Supplementary Material 5).