Discriminant validity of the Crown-Crisp Experiential Index

The discriminative power of the CCEI subscales was examined. Several approaches were undertaken on the responses from subjects in three neurotically disturbed groups and a normal control group. Analyses indicated that simple cut-off points could discriminate effectively an 'adjusted-neurotic' dimension; simple cut-off points were relatively more difficult to develop for discrimination among the three neurotically disturbed groups. Discriminant analysis of the CCEI subscales indicated that approximately 74 per cent of all subjects could be classified correctly. The OBS and HYS subscales were not found to be effective discriminators among the four groups. While that finding may question the utility of those scales, an alternative explanation was proposed in terms of the characteristics of the present samples.