“…* Territoriality [Weller, 1985] o Presence of other like-0 Fatigue [Berk, 1974] " Presence of agitator minded [Berk, 1974] [Feinberg, 1988] 0 Proximity to like minded a Disappointment * Presence of police [Berk, 1974] [Duggan, 1990] [Aveni, 1977] 0 Weapon availability 0 Perception of own * Curiosity [Berk, 1974] [ Berkowitz, 1964] strength/self-efficacy * Political events * Opposition [Canetti, 1981] [ Bandura, 1977] [Sullivan, 1977 0 Knowledge visibility * Time stress [Berk, 1974] [ reactions/motives " Making a statement [Berk, 1974] [Fogelson, 1971] 0 Age [Russell, 1998] " Proximity to speaker & Physically Aggressive [Meyer, 1978] [Russell, 1998] • Racial event [Weller, 1985] [Russell, 1995] • Frustration [Berk, 1974] 0 Underemployment [Dollard, 1947] [Russell, 1995] * Potential for reward 0 Commitment to cause [Berk, 1974] [ [Berk, 1974] * Time of day [Stark, 1972] [Stark, 1974] * Homogenity [Feinberg, 1988] [ Derlega, 2002] " Convenience [Aveni, 1977] * Comfort [Aveni, 1977] * Self efficacy [Bandura, 1977] This perspective is more of a process than an entity and provides a useful taxonomy for summarizing the literature. A sampling of relevant psychological variables that have been examined in the crowd context can be related to each of these phases.…”