Her Majesty’s Prison and Probation Service (HMPPS) has published researched on the experience of long term imprisonment from young adulthood. Those serving sentences with a tariff of 15 years or more were surveyed and interviewed.
The most severely felt problems related to missing others outside prison and feeling that one’s life was being lost or wasted. Most participants reported changing profoundly as a result of having to cope within the prison environment and the problems they encountered over an extended time period, including social withdrawal which could act as a barrier to reintegration on release.
Read the full report here