To improve the aseptic and sterile technique experiments, more trials could have been run
for both experiments. This may have provided more accurate data. Also, for the sterile technique
experiment, some of the variation that was observed between plates of the same procedure could
be controlled by doing all procedures using the same hands. In obtaining results, the size of the
colony had no effect on the amount of contamination counted with the petristickers. For
example, a small colony could be counted the same as a large colony because any contamination
in a square was counted as one. An improvement for gathering results would be to use smaller
grids to have a more precise count of contamination. Finally, varieties in the different species of
contamination could be noted, as well as how much contamination has grown over time.