2.1.1 Introduction

2.1.2 Mental models and (cognitive) task analysis

2.1.3 Formalisable models

2.1.4 Engineering and operator models

2.1.5 More general mental models

2.1.6 Models used in training or learning

2.1.7 Models derived from real users or operators

2.1.8 Expert systems for modelling operators

2.1.9 Models of error-prone human operators

2.1.10 Ragged edges