Table S7.

Using PC analysis, where applicable, to reduce variables per task in the young adult test

Task no.	Task	Measure	Type of measure	Scores into measure	Proportion variance explained, %	Fit
1a	Isolation	Anxious	PC	Time near exit (+), vocalizing (+)	54	0.77
1b	Isolation	Active	PC	Activity score (+), mobile (+)	46	0.77
2	Distraction	Distractibility	PC	Toy distraction (+), toy contact (+), food eaten (+)	61	0.77
3	Sustained attention	Attentive to human	PC	Body orient trial 1 and 2 (+), face orient trial 1 and 2 (+)	72	0.89
4a	Memory problem solving	Superior performance	PC	Solving time (−), no. correct (+), persistence (+)	69	0.97
4b	Memory problem solving	Accuracy	PC	Accuracy (+)	31	0.97
5	Multistep problem solving	Poor performance	PC	Solving time (+), perseveration (+)	80	0.89
6	Cylinder	Test trial score	Z-scored variable	Test trial score	NA	NA
7	Detour problem solving	Poor performance	PC	Test trial score (−), test trial 1 time (+), test trial 2 time (+), test trial 3 time (+)	56	0.85
8	Greeting	Willingness to interact	PC	Latency to approach (−), interact (+)	73	0.64
9	Ball play	Retrieval score	Z-scored variable	Retrieval score	NA	NA
10a	Novel object	Wary	PC	Latency to approach (+), orient (+)	58	0.69
10b	Novel object	Quiet	PC	Latency to vocalize (+)	42	0.69
11a	Umbrella opening	Reactivity	PC	Initial response (+)	35	0.64
11b	Umbrella opening	Recovery	PC	Approach (+), contact (−)	65	0.64