Jack Block’s scientific contributions

The relation between individual differences in personality and differences in developmental maturity was studied by relating observations of personality by multiple, independent judges to level of ego development. The personality characteristics of longitudinally followed Ss (104 at age 14; 98 at age 23) were evaluated by the California Adult Q-Set (CAQ); ego level was evaluated by the Washington University Sentence Completion Test of Ego Development (SCT). A priori personality dimensions—consisting of CAQ items for which a common developmental pathway was expected—were constructed and related to the SCT: (a) Ego-resiliency and interpersonal integrity were associated with increasing ego development, (b) conformity was associated with the Conformist level and, unexpectedly, to the Conscientious level, (c) need regulation was associated with the Conscientious level, and (d) self-case and expressiveness–playfulness were not associated with ego level.