This study tested the hypothesis that costs would be more effective th
an benefits in recruiting individuals for volunteer community service.
College students listened to volunteer recruiting messages that empha
sized benefits, or combined benefits and costs. Subsequently, took inf
ormation sheets about volunteer activities and/or signed lists to rece
ive phone calls from volunteer agencies. Students hearing the costs on
ly message or the combined message signed more lists and took more inf
ormation sheets than those who heard the benefits only message. Result
s were consistent with past research on overjustification and effort j
ustification. Implications for volunteer recruitment are discussed.