. Author manuscript; available in PMC: 2020 Oct 1.

Published in final edited form as: J Pers Soc Psychol. 2018 Jul 26;117(4):e35–e50. doi: 10.1037/pspp0000202

Table 1.

Descriptive information of the samples.

	Australia	Canada	Denmark	Japan	Czech Republic	United States
N	866	900	1190	1286	709	1336
Female	502	587	603	846	415	657
Age (M)	22.47^*	33.66	38.14	20.85^**	36.03^***	56.73
Age (SD)	3.73	13.87	11.52	3.9	14.02	14.8
Age (range)	17–33	15–68	18–67	14–30	15–81	19–89
Identical MZ twin pairs	193	249	232	449	-	-
Same sex DZ twin pairs	124	154	238	118	-	-

Opposite sex DZ pairs	116	47	125	76	-	-

NOTE: MZ = monozygotic; DZ = dizygotic;

For two individuals age at testing was not known;

^**

For one twin pair age was unknown;

^***

For 9 participants age was unknown.