The assumption that there are innate integrative or actualizing tenden
cies underlying personality and social development is reexamined. Rath
er than viewing such processes as either nonexistent or as automatic,
I argue that they are dynamic and dependent upon social-contextual sup
ports pertaining to basic human psychological needs. To develop this v
iewpoint, I conceptually link the notion of integrative tendencies to
specific developmental processes, namely intrinsic motivation; interna
lization; and emotional integration. These processes are then shown to
be facilitated by conditions that fulfill psychological needs for aut
onomy, competence, and relatedness, and forestalled within contexts th
at frustrate these needs. Interactions between psychological needs and
contextual supports account, in part, for the domain and situational
specificity of motivation, experience, and relative integration. The m
eaning of psychological needs (vs. wants) is directly considered, as a
re the relations between concepts of integration and autonomy and thos
e of independence, individualism, efficacy, and cognitive models of ''
multiple selves.''