349592b0_Human_factors___wikidoc__Use_of_subjects
[Name] Observations [Cost] $$ The type of this method is data collection. This method is used to monitor an individual or a group of individuals while completing a task and document. These observations can be documented by pencil and paper or by video recording. There are three main types of observations: Overt Observation – The observers will be watching the subjects but not interfere at all, but their presence is known Covert Observation – The subject is not aware of the observer’s presence. Participant Observation – Usually taken over a large period of time with a group of participants of similar characteristics. The best time to use this type of method is when time is not a constraint. It is a great way to elicit the information about the environment and is able to observe the steps the subject goes through. Best to be used when you need to see all aspects of the experiment. [Process] Observe subjects in natural environments, take notes and data [Result type] Qualitative, Observational [Use of subjects] 
User is observed by one or more facilitators who are familiar with the experiment
Human factors - wikidoc