Direct Observation of PA

Direct behavioural observation of the activities by experienced observers
Classify PA behaviours into distinct categories that can be quantified and analysed by using codes
Numerous instruments or systems
- Each designed for specific purposes
- Each with specific protocols for use
Mostly used for children or schools
Pros
- Excellent quantitative and qualitative information
- Frequency, time, intensity, type and context
- Applicable for children
Cons
- Time and labour intensive
- Not appropriate in large-scale studies
- Potential reactivity of subjects
- Subjectivity of observers
  - Intensive training needed