1. Diary is used to record observations daily but journal is used less frequently
2. Dairies are used to record behaviours that occur frequently that are easily forgotten
3. Recording of observations is usually made after the behaviour has occurred or as it occurs
4. Diary is used as a method of collecting data in case study and survey
5. Data can be collected by the researcher, research assistant, or caregiver
6. An alternative method is to record the data retrospectively at specific time intervals (e.g. 4 days or 7 days prior to interview), referred to as time diary