Observational

A non-experimental research technique in which observations are made without any intervention on the part of the researcher.
Found on http://www.cirem.co.uk/definitions.html

Observational

Ob`ser·va'tion·al adjective Of a pertaining to observation; consisting of, or containing, observations. Chalmers.
Found on http://www.encyclo.co.uk/webster/O/5

Observational

• (a.) Of a pertaining to observation; consisting of, or containing, observations.
Found on http://thinkexist.com/dictionary/meaning/observational/
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