Mark’s research focuses on the social psychological processes that underpin social identity, stereotyping, prejudice, and social exclusion. He has authored over 50 articles in this area. Over half of his journal articles are published in journals that are ranked in the top quartile of their field based on the SCImago Journal Rank indicator. His work has been cited over 3,000 times, and he is ranked in the top 15% of social psychologists based on his publication impact (career-stage e-index compared with 611 North American social psychologists; Nosek et al., 2010).