In behavioral genetic research, includes personal experiences, such as winning the lead in the school play.

In behavioral genetic research, "the nonshared environment" includes personal experiences, such as winning the lead in the school play.

Environmental influences can be isolated into two classes, shared and nonshared environment. Shared environment is shared by kin raised in a similar family. This incorporates such factors as financial status and parent instruction. Nonshared environment is the special to the person. This incorporates such factors as companion gathering.

The best sociological research method would have to be using experiments although it has some disadvantages as well