The basis of psychologjictures is its small, but rapidly expanding collection of digitalized pictures pertaining to the history of psychology and adjacent fields. The collection reflects the research interests of its founder, with a strong emphasis on the history of applied psychology and, more specifically, the history of psychological testing. Apart from that, it contains many items regarding such varied topics as psychology’s pioneers, early experimental psychology, and adjacent disciplines such as phrenology and eugenics. Furthermore, the collection includes digitalised copies of the picture archives of the Archives of Dutch Psychology. 

Facilities for online search in the collection are currently under construction.