Reasoning and Rehabilitation cognitive skills programme for mentally disordered offenders: Predictors of outcome

Table 3 Differences between pre and post measures on the psychometric tests

Measure	n	(pre)	SD (pre)	Mean (post)	SD (post)	t(df)	Cohen’s d
MVQ (total)	76	15.78	12.19	12.23	9.61	3.75 (75)2	0.43
SPSI	76	11.73	3.00	12.54	3.04	-2.33 (75)1	0.27
NAS-PI	76	80.99	19.89	77.09	15.86	2.09 (75)1	0.23
LoC	52	16.77	5.42	16.32	5.39	1.91 (51)	0.08
DBSP	63	35.21	11.40	32.57	11.32	2.16 (62)1	0.27

¹P < 0.05;

²P < 0.01. MVQ: Maudsley violence questionnaire; DBSP: Disruptive behaviour and social problem scale; NAS-PI: Novaco anger scale and provocation inventory; LoC: Locus of control scale; SPSI-RS: Social problem-solving inventory-revised short.