Predicting closed quarters battle capability - Examining the influence of personality, attentional ability, 2D:4D-ratio and mindfulness on tactical performance.

Close Quarters Battle (CQB) is an operational approach in confined spaces gaining increasing significance in urban combat missions. Due to its high psychophysiological demands, the CQB ability is an essential selection criterion for special forces. Until now, there has been no research on predictors of CQB capability. This study examined the influence of the Big Five personality traits, self-esteem, resilience, attentional ability, 2D:4D digit ratio, and mindfulness on the CQB performance. The German sample comprised a total of n = 45 individuals (n = 29police special forces; n = 16 unspecialized soldiers) who conducted psychometrics and a CQB test consisting of three scenarios. In these scenarios, two independent experts evaluated tactical behavior, weapon handling, gaze behavior, response time, and failures using a standardized behavioral observation instrument based on video recordings (external cameras and mobile eye-tracking). The results revealed that only extraversion predicted the CQB performance (β = -.40, p = .035). However, the mean 2D:4D ratio was strongly associated with gaze behavior (r = .45, p = .007), tactical behavior (r = .41, p = .019), and attentional ability (p = .57, p < .001). Surprisingly, the findings indicate that CQB, as a high-risk and analytical task, is better performed by introverted personnel.