The phrase "unit of investigation" is correct and can be used in written English.
It is typically used to refer to a specific aspect or element that is being studied or examined in research or analysis. This could be a concept, a group of individuals, a set of data, or any other defined unit that is being investigated. Example: "The researchers chose the individual as the unit of investigation in their study on the effects of socioeconomic status on academic achievement."
Recognizing the "holobiont"— the multicellular eukaryote plus its colonies of persistent symbionts — as a critically important unit of investigation opens up new investigative avenues and challenges the ways in which the biological sub-disciplines have heretofore characterized living entities.
The composite sample of a unit of investigation was crushed and homogenized in a mill.
The unit of investigation was the individual.
This study follows a retrospective longitudinal design, with the operator as the unit of investigation.
Nova Scotia has a relatively small population and few studies 13 have been conducted to examine within-province inequalities in health using small-area equivalents to neighbourhood or community as a unit of investigation.
For my model, therefore, I assume that all screening subjects with positive CT results will be investigated by bronchoscopy, an assumption which appears likely to overstate the expected unit costs of investigation.
However, it should be noted that each vertex (i.e., the spatial unit of our investigation) samples the averaged response of thousands of neurons and thus a broad spatial tuning profile may have resulted from averaging many narrow tuning profiles.
As Amos H. Hawley wrote, "… [community] is in fact, the least reducible universe within which ecological phenomena may be adequately observed….The community, then, is the basic unit of ecological investigation" (1950: 180).
Because the Aberjona Watershed is typical of many urban, industrialized areas, these results suggest that the whole watershed often defines the appropriate unit for investigation of chemical contamination in the environment.
To document the oral findings associated with GORD, patients referred to the Gastro-intestinal (GIT) endoscopic unit for investigation of gastro-oesophageal tract disease were also evaluated for dental erosion and other soft tissue symptoms such as non-specific burning sensation in the mouth and sensitivity in the tongue.
That's what we are missing in this whole idea of investigation units.
