Table 1.

IQ scores of the participants (N = 250).

	Full IQ
Entire sample	109.7 (11.7)
Gender differences
Men (n = 125)	109.1 (11.7)
Women (n = 125)	110.3 (11.7)
	t(df 1,249) = 0.83
Age differences
20–29 years (n = 50)	109.6 (12.3)
30–39 years (n = 50)	108.3 (11.3)
40–49 years (n = 50)	107.8 (12.2)
50–59 years (n = 50)	110.7 (10.5)
60–69 years (n = 50)	112.0 (12.0)
	F(df 4,245) = 1.08
Education differences
Elementary school (n = 42)	104.9 (12.0)
Senior high school (n = 142)#	108.3 (11.8)
BA degree or higher (n = 79)	114.5 (9.7)
	F(df 2,347) = 12.03*

IQ in mean (SD). t: significance test of the gender differences. F: significance test of the age and education level differences.

^*p < .001, Bonferroni corrected.

^#Senior high school is not compulsory in Norway.