Probation is generally defined as a sentence served while under supervision in the community. It may include a period of incarceration followed by a probationary period split sentence. The sentencing court may reconsider an offender's prison sentence within a limited time and modify it to probation (modification of 'Shock' probation sentence). 'Shock' probation involves resentencing an offender to probation after a confinement period, and intermittent incarceration involves a probationer's spending weekends or nights in jail. Most probationers complete their probation without incarceration or revocation. Recent research reveals that felony probationers often pose significantly higher risks to the community than misdemeanor probationers. Crowded prisons and jails have increased the use of probation with more intensive controls for offenders who would normally be sent to prison. Such controls include intensive supervision, electronic monitoring, and house arrest. 13 references, discussion questions. See NCJ 104205 for videotape.