# observations Observations are **collected from** a participant in response to an experiment.

### JSON variables :blue\_circle: Primary key\ :red\_circle: Required

Variable	Type	Default	Description
`DateEnd`	datetime		End datetime of the observation.
`DateRecordCreate`	datetime		Date the record was created in the current database. The original record may have been imported from another database.
`DateRecordEntry`	datetime		Date the record was first entered into a database.
`DateRecordModify`	datetime		Date the record was modified in the current database.
`DateStart`	datetime	🔴	Start datetime of the observation.
`Description`	string		Longer description of the measure.
`Duration`	number		Duration of the measure in seconds, if known.
`InstrumentName`	string		Name of the instrument associated with this measure.
`ObservationName`	string	🔴 🔵	Name of the observation.
`Notes`	string		Detailed notes.
`Rater`	string		Name of the rater.
`Value`	string	🔴	Value (string or number).