Observation sessions refer to a process in which an individual, group or event is observed and documented by a researcher. This can involve systematic observation where data is collected through direct observation, non-systematic observation where data is collected informally, participant observation where the observer becomes part of the group being studied, and non-participant observation where the observer remains an outsider to the group. The purpose of these sessions could be for research, evaluation or training purposes. During such a session, the observer takes note of behaviors, actions, interactions, and other relevant details that can provide insights into the subject being studied.