Construction of a stabilometer capable of indicating the variability of non-level performance

Construction and validation of a stabilometer as a measure of gross motor balance was achieved by using a stabilometer designed to provide a quantitative score sensitive to variability of performance in a non-horizontal position. Reliability was obtained through test-retest and by mechanically manipulating the instrument. Validity was indicated by content and construct validity techniques. Both reliability and validity were high, and the instrument was viewed as appropriate for measuring gross motor balance.