The harshest criticism I’ve yet read of Henriques’ bid to unify psychology (starting here) comes from Stephen Yanchar. He sees Henriques’ work as an attempt to repackage extant theoretical perspectives and sidestep critical reflection.
Yanchar (2004) draws attention to the literature that cautions against unification. Indeed, the idea of unity would ‘force psychology into a theoretical straightjacket’. Henriques’ model is described as: ‘rigid’, ‘exclusive’ and ‘disciplinary agenda setting’. More important than unification, for Yanchar (2004:1280) is: “…a continual dialogue among psychologists from diverse research communities,” and, “…the pursuit of truth…”