This study is an examination of the influences of incarceration on perceive
d causes of loneliness. A heterogeneous prison population was divided into
five homogeneous subgroups (sex offenders, violent offenders, property offe
nders, drug-related offenders, and a category that contained all other misc
ellaneous offenders) whose loneliness experiences were then compared. Three
hundred fifty-six incarcerated male offenders and 501 men from the general
population were recruited on a voluntary basis. They reported the perceive
d sources of their loneliness on an 82-item, yes/no questionnaire. Results
indicated significant differences in perceived causes of loneliness between
the criminal and general populations and within the criminal sample when t
he data were examined according to offense type.