ImPACT Version 4 consists of the same items and subtests as the current version of ImPACT. However, there are several notable changes including:
- a. Expanded age range to include 12-80 years of age
- b. Test can be completed using either a mouse or trackpad as there are now separate norms for each
- c. There is a Two-Factor Score available as an addition to the traditional 4 composite solution
- d. The Cognitive Efficiency Index (CEI) is no longer calculated or displayed on the ImPACT Clinical Report
- e. The normative groups (by age and overall) are substantially larger than the earlier version of ImPACT