History-based model vs. psychological model

The history-based model enjoys simplicity of implementation. No knowledge about the user interface content is required. It is also more flexible in making different tradeoffs between energy savings and lazy errors. On the other hand, the psychological model generates negligible lazy errors. However, it has to know the user interface content, which may be complex and dynamic. Moreover, the Hick-Hyman Law has limitations in modeling complex cognitive processes. The psychological model is more accurate for user interfaces that do not involve complicated cognitive processes. Therefore, different delay models should be used for different states to exploit the strengths of both the history-based and psychological models.