1 Techniques
- think-aloud
- co-operative evaulation
- paper and pencil protocol
- audio recording
- video recording
- computer logging
- user notebooks
- post-talk walkthroughs
2 Disadvantages
- observation bias exists
- coding schemes
- laborioua and difficult
- experts needed, training needed
- often a mix of multiple techniques
- automatic protocol analysis tools available (esp. in usability labs)