APA Dictionary of Psychology

a formula for predicting the level of self-awareness experienced by individuals in social settings, based on the assumption that they will become more self-attentive and thus more concerned with matching to standards of appropriate behavior as the relative size of their subgroup decreases. It is given as OTR = the number of other people who are not part of (i.e., who oppose) the target subgroup/the total number of people in the overall group. Thus, the OTR for a single minority member facing a five-person majority would be 5/6, or .83. [described in 1983 by U.S. social psychologist Brian Mullen (1955–2006)]