It was difficult to take something that was qualitative and make it
quantitative without losing some of the accurateness. When quantifying
a visual quality assessment, it was hard to be consistent in assigning
Lifting consistency was also a source of error in this
experiment. It was difficult to maintain the same pressure when
smoothing a lift or to make sure to get into all the grooves of the
There weren’t enough trials done on each item or each material type.
If more trials had been done, it would have given a more accurate
representation of the quality of lifts from each item, surface,
material or reagent.
Statistical analysis was done using an SPSS program. Chi-Square tests
showed that the data wasn’t significant. This was most likely because
the QFES scale only went from one to ten, so the difference between
the qualities weren’t considered significant by the chi-square test
although the difference in print lift qualities was quite obvious. If
the scale of the QFES had been one to one hundred, the results might
have been considered more statistically significant.