Although to be attentive has been widely regarded as prerequisite in learnings, literature was sparse concerning supervisor’s feedbacks effects on information processing. Thus, this research focused on information processing efficiency in reaction to competence-related feedbacks. It was assumed that supervisors providing competence-thwarting feedbacks, which could be anxiogenics, may be perceived as threat and impair attention. Inversely, competence-supporting feedbacks would foster information processing Seventy-four men (Mage = 18.68, SDage = .76) participated to a modified dot-probe task, by reacting as quickly as possible at 200 stimuli per condition. Prior stimulus appearance, a supervisor in video-capsule provided indication about occurrence side: 50% were congruent, 25% incongruent, 25% uncued. Participants experienced two conditions designed with competence-related video-feedback: neutral then competence-supporting (underlying success and progress; n = 37) or competence-thwarting (highlighting failure and rivalry; n = 37). Reaction times were faster under competence-supporting and competence-thwarting condition than neutral condition. This acceleration was stronger under competence-thwarting condition. However, errors to congruent and incongruent trials increased under competence-thwarting condition whereas remained stable under competence-supporting conditions. Consistently with anxiety effects, competence-thwarting feedbacks would improve information processing effectiveness whereas competence-supporting feedbacks would foster efficiency like self-efficacy improvement effects which can induce faster reaction times and greater response accuracy.