This study uses meta-analytic techniques to examine the effect of safety training and workplace hazards on the development of safety knowledge and safety performance. Analyses indicate that for safety knowledge and safety performance, highly-engaging training was more effective than less-engaging training when hazardous event/exposure severity was high. This effect was reduced when hazardous event/exposure severity was low. These findings indicate that it is especially important to consider using highly-engaging safety training when employees are likely to be exposed to hazardous events.