The psychological aspect, one of the three (social, physical/biological, and psychological) of the Individuality tends to fall behind and mostly get stuck during the childhood, instead of catching up congruently with the physical/biological and social aspects that grow and mature steadily.

When fixated on, the psychological aspect manifests itself as the INCONGRUENT Need-To-Be-Loved that results in childish behavior. Never-the-less, being an Imperfect Individuality as Self, we will always have the Need-To-Be-Loved-By-Others that is "congruent" with the "social" and "physical" needs.