Addressing key features of gang membership: Measuring the involvement of young members

In recent years, the growth in knowledge of the characteristics and activities of gang members has been impressive. Little is known, however, about the key features of younger gang members, those in middle school. Ninety-six middle school students who self-reported current or former gang membership in a school-based survey form the sample for this analysis. This study examined four dimensions of gang membership: joining the gang, processes involved in gang life, organizational characteristics of the gang, and family characteristics. Gang membership appears to be transient, with a weak hold on members during periods of membership. This is especially true when the results of this study are compared to studies that used older members.     

The Dud Effect: Adding Highly Dissimilar Fillers Increases Confidence in Lineup Identifications

Recent research in decision-making has demonstrated the “dud-alternative effect”—the tendency to become more confident that a chosen response option is correct if it is surrounded by implausible response options (Windschitl & Chambers, J Exp Psychol 30:198–215, 2004). This finding may be applicable to a lineup task: The presence of duds (i.e., highly dissimilar fillers) may increase a witness’s confidence that an identified (non-dud) lineup member is the criminal. Four studies (N = 665) demonstrate that the mere presence of highly dissimilar fillers inflates witnesses’ confidence in a mistaken identification (Studies 1–4), provides evidence that this confidence inflation is due to the duds inflating the perceived similarity of the other lineup members to the criminal (Studies 2, 3), and delineates some conditions under which the effect holds (Studies 3, 4). The addition of highly dissimilar lineup members, far from being inert, as is often implicitly assumed, can bias witnesses’ confidence reports.