The Most Advanced Cross-Battery Assessment Solution Ever Created X-BASS 3.0 provides school psychologists and other assessment professionals with efficient, expert analysis of within-battery and cross-battery assessment findings for a variety of purposes. Ensures psychometrically and theoretically defensible assessment and interpretation. All batteries included in X-BASS are classified according to the most current CHC taxonomy. Guidance regarding follow up assessment is provided throughout X-BASS 3.0 to ensure that follow up assessment is conducted when necessary.