This document discusses the psychological impact of observations on teachers and students. It notes that the relationships between the observed teacher, observer, and other parties involved can impact the experience. The attitudes towards learning, development and authority of all individuals also shapes how the observation is conducted and received. Observations can lead teachers to avoid experimentation, conform to perceived models, or give observers what they think is wanted rather than their true teaching style. To minimize these effects, some researchers use unobtrusive measures where the subject is unaware they are being studied to obtain natural behavior without interference from the observer.