“…In this way, the abstracts/titles are used to generate terms, then the co-occurrences of these terms 3 The present study is the first of its kind considering the scope: we cover as much psychology as possible to extract largescale historical trends from the literature. Pioneering work on applying digital analysis to history of psychology has been done by Christopher Green's group of historians at York University (Green, 2017;Green, Feinerer, & Burman, 2013, 2015a, 2015bPettit, Serykh, & Green, 2015;Burman, Green, & Shanker, 2015;Young & Green, 2013;Green & Feinerer, 2015), but on a smaller scale and in a different time period. 4 An interesting approach to discourse-vocabulary-discipline investigation is the work of John Benjafield (2012Benjafield ( , 2013.…”