“…Using cross-sectional designs, Heskin and his colleagues measured inmates performances on cognitive tests (Banister, Smith, Heskin, & Bolton, 1973), personality measures (Heskin, Smith, Banister, & Bolton, 1973), and attitudinal scales (Heskin, Bolton, Smith, & Banister, 1974). Four groups of prisoners, all sentenced to at least 10 years, were studied.…”