2. Call lesion:
A. Left lesion if Left is greater than the Right
B. Right lesion if Right is greater than the Left plus 3
C. If called brain damaged but A and B DO NOT apply, call brain-damaged bilateral.
The predictive efficiency of the above cut off rules was then cross validated with results shown in Appendix B, Table 3. The predictive accuracy with regard to laterization is shown in Appendix B, Table 4.