Results indicate that correctional institutions are making serious commitments to reduce the social isolation of inmates through more liberal communication policies. In 1971, only 63 percent of institutions allowed inmates to write a maximum of at least eight letters per week. Ninety- seven and 99 percent allowed this in 1991; most currently have no maximum limit on the number of letters than can be written. Most also do not limit the number of letters received. In addition, the percentage of institutions permitting inmates more than four visits per month increased from 56 percent in 1971 to 75 and 76 percent in 1981 and 1991. Institutions are also permitting longer visits. The number of telephone calls inmates were allowed to receive per month did not change significantly over the 20-year period. Further research is needed to determine the effects of inmates' increased contacts with outside society. Table, appended instrument, and 9 references (Author abstract modified)