Turkish children's Bender-Gestalt Test performance: a pilot study and preliminary norms.

The present study was undertaken to provide preliminary data for norms on the Bender-Gestalt Test for 253 children ages 5 yr., 5 mo. to 11 yr., 10 mo. in Turkey. The Koppitz Developmental Scoring System gave mean error scores of 4.2 (SD = 3.3) for girls and 3.6 (SD = 3.0) for boys. The mean error scores obtained by all age groups are presented and compared with other cross-cultural data. These scores decreased across age groups, supporting Bender's maturational hypothesis of the test. The present sample performed at a higher developmental level than the Koppitz normative sample for the 5- and 6-year age groups, while means for other age groups were similar to the original U.S. norms. That this pattern is supported in other cross-cultural studies is discussed as well as the importance of developing local norms for visual spatial tests.