The parameters that affect the efficacy of voiced warnings have only recently begun to be investigated. The current study examines the effects on intended carefulness ratings for voiced warning statements considering the following factors: sex of speaker, sex of participant, voice style (monotone, emotional, whisper), and sound level (low, high). Warning statements voiced in the emotional voice style and in a higher sound level produced the higher intended carefulness ratings. Implications for the design of voiced warnings are discussed.
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