Parallel forms of the Knowledge of Behavioral Principles as Applied to Children questionnaire: an independent, multi-centred, British replication.

The psychometric properties of the test entitled Knowledge of Behavioral Principles as Applied to Children and two shortened forms of this test were investigated in two samples of British subjects. The first consisted of 162 psychiatric nurses, psychiatrists, occupational therapists, physiotherapists and clinical psychologists attending behaviour modification courses. The second consisted of 49 teachers and nurses, all working with the mentally retarded, who completed the test by post. The whole test and the two sets of parallel forms all showed good internal consistency and sensitivity to change. Some shrinkage during replication was found. The 25-item forms showed evidence of the properties of parallel forms (equal means, standard deviations and standard errors) in both samples. The 10-item forms were also parallel in sample 1. However the 10-item forms did not remain parallel in sample 2 and so cannot always be recommended.