The Stability of Self-Control: A Group-Based Approach

In A General Theory of Crime (1990), Gottfredson and Hirschi argue that self-control, fully developed in the early stage of life (around age 8 to 10), is a primary explanatory factor of deviance. Research consistently supports the relationship between self-control and deviance, while only limited studies have examined whether self-control is stable after age 10. Using a longitudinal national sample of South Korean youths from age 10 to 14, this study provides a rigorous test of three assumptions of the self-control stability thesis: first, if the development of self-control follows a homogenous process among individuals; second, if within-individual level of self-control stay unchanged over time (absolute stability); and third, if the age and self-control relationships parallel across individuals (relative stability). Both attitudinal and behavioral measures of self-control were used to investigate whether different measures yielded different results in the stability thesis. The results indicated that among individuals multiple developmental paths of self-control existed instead of a homogeneous path. The findings also showed different measures yielded divergent results in the stability thesis. While the analysis of the attitudinal measure revealed strong absolute stability for 50% of the sample, and strong relative stability for 99.7%, the analysis of the behavioral measure showed strong absolute and relative stabilities for 88.6% of the sample.