Moral Judgment Intervention Studies Using the Defining Issues Test

Fourteen moral judgment intervention studies were reviewed and evaluated. All used Rest's (1974) Defining Issues Test as an index of moral judgment development. Results showed that significant changes on the Defining Issues Test were related to duration and type of intervention and degree of experimental control over treatment variables. The studies provided independent support for the ability of the instrument to index upward movement after intervention programmes designed to influence development. Half the studies produced significant developmental change.