(section: 3 / paragraph: b. / sub-paragraph: iv. / line: 2)

2016-11-03 16:39 "Simpson Index" can be loosely applied to 3 different values (and calculations) depending on the author/source: Simpson's Index, Simpson's Index of Diversity and Simpson's Reciprocal Index. This should be clarified.

Students should be familiar with all three. If used for the National competition the national supervisor will specify which is being used. We have chosen to define the Simpson index, p as the proportion (n/N) of individuals of one particular species found (n) divided by the total number of individuals found (N), Σ is still the sum of the calculations, and s is the number of species. This information can be found on the files distributed at coaches clinics and will also be on the SO website once the clinics are over.