Original:  Instead, Newman, Duff, and Baumeister (1997) proposed a new model of defensive projection . In this view, repressors try to suppress thoughts of their undesirable traits , and these efforts make those trait categories highly accessibleso that they are then used all the more often when forming impressions of others.
Revised:  Instead, Newman, Duff, and Baumeister (1997) proposed a new model of defensive projection in which the repressors efforts to suppress thoughts of their undesirable traits , and these efforts make those trait categories highly accessibleso that they are then used all the more often when forming impressions of others.
Edit intent: clarity