The purpose of this study was to examine behavioral inhibition system and behavioral activation system (BiS/BaS) motives and loneliness as predictors of eating disturbances (viz., drive for thinness, bulimic symptoms, & body dissatisfaction) in female college students. Three hundred and one female college students (ages ranging from 18-33 years) completed measures assessing for BiS/BaS motives, loneliness, and eating disturbances. results of conducting regression analyses indicated that BiS/BaS motives, especially BiS motives, accounted for significant amounts of variance across all three eating disturbance outcomes examined (R 2 range = .10 to .13). Moreover, the inclusion of loneliness as a predictor of eating disturbances was found to account for additional unique amounts of variance (∆R 2 range = .02 to .06), over what was accounted for by BiS/BaS motives. These findings indicate that in addition to the potential role of biologically linked variables like BiS/BaS motives, it is important to also consider the contributions of important psychosocial variables like loneliness for understanding eating disturbances among female college students.