Table 5. Mean scores on the personality trait questionnaire, by age groups.

Age Range	Extraversion	Agreeableness	Conscientiousness	Neuroticism	Openness to Experience
18–20	30.08	32.83	35.14	21.72	36.36
21–30	29.19	33.64	35.53	21.06	33.93
31–40	30.88	35.20	36.28	19.24	36.44
41–50	29.11	36.25	36.67	20.56	35.66
51–60	29.22	36.57	37.15	20.40	34.92
61–70	28.39	36.26	37.18	20.40	34.84
71–81	27.58	36.23	36.38	19.96	35.35
Total	29.15	35.55	36.54	20.56	34.96
Pearson correlation*	-0.030	0.209+++	0.121+++	-0.052+	0.033

*Based on version A-2 in Table 3 which is in log-linear form. Therefore, these variables are expressed in natural logarithms.

+ Significant at the 10 percent level.

++ Significant at the 5 percent level.

+++ Significant at the 1 percent level.