De or het individualpsychologie?

The correct Dutch article is:

de individualpsychologie

Rule Words ending in -logie: always de. See the rule
Meaning (Dutch) (psychologie) stroming die van een holistische benadering van de mens uitgaat

How to use individualpsychologie

the individualpsychologiede individualpsychologie
this individualpsychologiedeze individualpsychologie
that individualpsychologiedie individualpsychologie
our individualpsychologieonze individualpsychologie
your individualpsychologiejouw individualpsychologie
every individualpsychologieelke individualpsychologie
which individualpsychologie?welke individualpsychologie?
a big individualpsychologie / the big individualpsychologieeen grote individualpsychologie, de grote individualpsychologie

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).