Abstract: The purpose of the current study was to explore the effect of mental fatigue level and framing on risk decision making. A 2(fatigue, non-fatigue)×2 (gain frame, loss frame) experiment was designed. A total of 36 undergraduate students accepted fatigue inducement simultaneously. Another 93 undergraduate students finished risk decision making task under non-fatigue status. ANCOVA analysis showed that, participants under fatigue status were more risk averse than those in non-fatigue group. The main effect of framing was significant, but the interaction effect of fatigue level and framing was not significant. The implications of the study and possible future research were discussed.

Key words: mental fatigue, framing effect, risk decision-making