01912 2200277 4500001000700000011001300007100004100020101000800061102000700069200009400076330099700170461006801167606002101235606003201256606002601288606001901314606001801333606002001351675001001371700008501381701010801466701000801574702002701582801001201609852001301621408870 a15527522 a20240925d kkky0pory50 ba aeng aNL aMeasuring group climate in prisonfG.H.P. van der Helm, G.J.J.M Stams, P.H. van der Laan aThe present study examines the construct validity and reliability of the Prison Group Climate Instrument (PGCI) in a sample of 77 adolescents placed in a Dutch youth prison and 49 adult prisoners living in a Dutch psychiatric prison with a therapeutic living group structure. Confirmatory factor analysis of a four-factor model – with ‘repression’, 'support’, ‘growth’ and ‘group atmosphere’ as first order factors – and ‘overall group climate’ as a second order factor showed an adequate fit to the data, indicating construct validity of the PGCI. Cronbach’s alpha reliability coefficients were good for all factors. The PGCI is a parsimonious instrument, enabling future research on group climate in youth prisons and secure forensic psychiatric institutions. The instrument can be used as an assessment tool for judicial interventions that use group climate to improve outcomes in delinquent youth and adult delinquents receiving treatment for psychiatric problems. cAmsterdãod2011tThe Prison JournalvVol. 91, nº 2x15527522 aCENTRO EDUCATIVO aPSIQUIATRIA PENITENCIÁRIA aREINSERÇÃO SOCIAL aREINCIDÊNCIA aAVALIAÇÃO aESTUDOyHOLANDA a343.8 avan der HelmbG.H.P. cLeiden Professional University (School of Social Studies) 4070a Stamsb G.J.J.M cUniversity of Amsterdam (Department of Forensic Child and Youth Care Sciences). 4070 aVAN DER LAANbPeter H. aPTgRPC j343.8HEL