What Puts the Design in Interaction Design
http://www.uxmatters.com/MT/archives/000209.php

Silver, Kevin
UXmatters
2007

Abstract:

Interaction design lies at the junction of several design disciplines. The resulting crossover between various specialties and issues is often muddled, understandably. There is no doubt that interaction design, as a design discipline, differs from applied human-computer interaction and cognitive psychology. These distinctions are omnipresent in the current literature.