Table 2.

Demographic data for Japanese and UK, autistic and non-autistic samples. JP = Japanese culture, UK = British culture. FSIQ = Full-scale IQ; FSIQ was assessed with the Wechsler Adult Intelligence Scale (WAIS)-IV [75] in Japanese participants, approximations of FSIQ were derived from Wechsler Abbreviated Scale of Intelligence (WASI)-II [76] scores in UK participants. Average time in culture is displayed as average proportion of lifetime (years lived in culture divided by age)

Test	UK			JP
	Autistic (n = 25)	Non-autistic (n = 24)	Group comparison	Autistic (n = 25)	Non-autistic (n = 23)	Group comparison
Gender F/M/O	13/11/1	15/9/0	–	9/16/0	7/16/0	–
Age M (SD)	31.64 (9.68)	24.33 (7.02)	p = .004	29.12 (6.00)	27.39 (8.16)	p = .405
Average time in culture	93.36%	87.99%	–	100%	99.55%	–
FSIQ M (SD)	108.29 (18.74, [n = 24])	114.13 (9.94, [n = 23])	p = .198	105.12 (13.12, [n = 25])	113.44 (8.38, [n = 18])	p = .023
AQ M (SD)	34.48 (8.12, [n = 23])	13.25 (4.87, [n = 23])	p < .001	34.64 (6.1)	16.73 (5.63, [n = 22])	p < .001

Cross-cultural comparisons (UK vs JP)
	Autistic	Non-autistic
Age	p = .248	p = .175
FSIQ	p = .488	p = .816
AQ	p = .775	p = .021