Waytz, A., & Schroeder, J. (2014). Overlooking others: Dehumanization by commission and omission. Testing, Psychometrics, Methodology in Applied Psychology, 21, 1-16. [APA PsycNet Link]
Short Summary: This paper distinguishes between two forms of dehumanization, dehumanization by commission (actively and overtly representing others as subhuman) and dehumanization by omission (more passively overlooking others’ mental capacities).