Purpose: Measure concept formation and abstract reasoning
Age: 15 years and older
Time: 30-60 minutes
Qualification Level: A (Psychologist)
This portable version of the widely used Halstead Category Test (CT) allows you to distinguish individuals ages 15 years and older with brain damage from normal individuals. The BCT contains 208 visual stimuli that assess complex concept formation and abstract reasoning.
The two portable BCT easel binders contain all 208 Category Test designs. The task demands of the BCT are essentially equivalent to those of the CT. The BCT eliminates the need for expensive, complex projection equipment. Administration instructions are now incorporated on the backs of the Stimulus Plates and in the Response Form to aid in standardisation of the BCT administration. The BCT Response Form has also been updated to enhance its ease of use. The stimuli for each subtest are presented on a single page to aid in test administration and to facilitate the review of patient responses. The new Score Summary section of the form facilitates the use of the demographically corrected normative data which are now included in the expanded BCT Professional Manual for improved diagnostic accuracy and interpretation of error scores. The revised manual also provides information about current research findings related to the clinical utility of the BCT.
The BCT is administered by presenting the Stimulus Plates and having the respondent point to the number on the BCT Response Strip that corresponds to the pattern on each Stimulus Plate. The examiner records the individual responses and then tallies the incorrect responses to obtain the error score.
Regarded as the most sensitive indicator of brain dysfunction in the Halstead-Reitan Neuropsychological Test Battery, the CT is nearly as valid as the complete battery in detecting brain damage. In a cross-validation study, the BCT correlated with the CT at the same statistical level as the CT correlates with itself, suggesting that the BCT retains the high reliability and validity of the original instrument.