Final answer:
Probationers committed fewer crimes than parolees.
Step-by-step explanation:
Researchers comparing probationers with parolees discovered that probationers committed fewer crimes than parolees. Probationers are individuals who are released into the community under supervised time as an alternative to prison, while parolees are individuals who are temporarily released from prison with supervision. The goal of probation and parole is to prevent individuals from returning to criminal activities and promote positive community engagement.