Words to Describe investigation

How investigation often is described ("________ investigation")

• longitudinal
• congressional
• patient
• present
• scientific
• quantitative
• adequate
• analytical
• official
• sociological
• comprehensive
• close
• empirical
• archaeological
• careful
• experimental
• philosophical
• mathematical
• formal
• systematic
• theoretical
• impartial
• active
• serious
• accurate
• initial
• historical
• full
• exhaustive
• further
• intensive
• ongoing
• grand
• scale
• critical
• comparative
• exploratory
• scholarly
• microscopic
• judicial
• immediate
• routine
• criminal
• thorough
• clinical
• federal
• intense
• controlled
• detailed
• psychological
• closer
• recent
• rigorous
• statistical
• worth
• proper
• epidemiological
• future
• independent
• complete
• subsequent
• extensive
• elaborate
• preliminary
• minute