De or het psychologiestudie?

The correct Dutch article is:

de psychologiestudie

How to use psychologiestudie

the psychologiestudiede psychologiestudie
this psychologiestudiedeze psychologiestudie
that psychologiestudiedie psychologiestudie
our psychologiestudieonze psychologiestudie
your psychologiestudiejouw psychologiestudie
every psychologiestudieelke psychologiestudie
which psychologiestudie?welke psychologiestudie?
a big psychologiestudie / the big psychologiestudieeen grote psychologiestudie, de grote psychologiestudie