Genetic and Environmental Influences on the Allocation of Adolescent Leisure Time Activities

Table 4

Twin correlations (95% confidence intervals) for MZ and DZ same- and opposite-sex twin pairs.

Zygosity	Leisure time activity scales
	Physical activity	Social activity	Intellectual activity	Family activity	Passive activity
MZM	0.51; (.42, .59)	0.50; (.41, .57)	0.41; (.31, .49)	0.50; (.41, .57)	0.21; (.41, .32)
MZF	0.52; (.42, .59)	0.54; (.46, .61)	0.39; (.30, .47)	0.54; (.46, .61)	0.54; (.47, .61)
DZM	0.42; (.31, .52)	0.21; (.09, .32)	0.19; (.06, .32)	0.21; (.09, .32)	0.24; (.09, .32)
DZF	0.28; (.15, .39)	0.30; (.18, .41)	0.23; (.11, .34)	0.30; (.18, .41)	0.30; (.18, .41)
OSDZ-MF	0.07; (−.09, .23)	0.27; (.12, .41)	0.09; (−.05, .23)	0.19; (.03, .33)	0.13; (−.02, .28)
OSDZ-FM	0.12; (−.07, .29)	0.42; (.26, .54)	0.03; (−.15, .21)	0.06; (−.13, .23)	0.23; (.05, .39)

Note: MZ: monozygotic; DZ: dizygotic; OS: opposite-sex; M: male; F: female.