Prosocial behavior toward strangers was investigated via responses to
wrong-number messages on telephone answering machines. Two hundred for
ty anonymous participants were randomly selected from the telephone di
rectory of a midsized, midwestern community. Each participant received
a message that was intended for someone else. The importance and urge
ncy of the message were varied-low, medium, high, and high with a prod
(a direct request for help). Overall, the findings revealed a higher
than anticipated prosocial response. The number of return calls increa
sed as a function of the urgency and importance of the misdirected mes
sage.