Reliability and construct validity of the six-block Tactual Performance Test in and adult sample.

The ten-block Tactual Performance Test (TPT-10) has been criticized as a clinical instrument due to the long administration time and accompanying psychological distress. The shorter children's six-block version (TPT-6) has been proposed as a potential substitute. The current study examined the internal consistency, the test/retest reliability and the construct validity of the TPT-6. The results indicate that the TPT-6 is a very reliable instrument and is similar to the TPT-10 in terms of construct validity. Most importantly, the actual administration time is approximately one third that of the TPT-10.