According to Ross and colleagues, who have studied TCs in biology, "we need to emphasize that while academics and teachers identify the content knowledge as troublesome or problematic, the threshold concepts which underlie the problematic difficult content knowledge receive the least attention in teaching" (Ross et al., 2010, p. 170).
Therefore, in addition to the threshold problematic, the most important result of our study was that video and full-information ratings were not comparable.
Other regions are more problematic: if the thresholding and seed selection is too strict, faintly visible somata disappear during the preparation of sets S and L, leading to false-negative detections; if too loose, then many non-soma regions (such as dendritic arbors or axonal bundles) are retained and FPs arise.
However, laser size and threshold remain problematic.
From a scientific perspective there is no threshold defining problematic values of bioaccumulation.
The use of semiquantitative test kits is likely to be problematic, with their high threshold (0.5 μg/L) increasing the risk of false negatives.
He adds that the DNL 65 dB threshold is problematic because it represents flight noise averaged over a typical 24-hour period.
They hypothesized that since girls have a higher threshold for problematic behavior or physical disorders than boys, they consequently require more harmful risk factors to develop problem behavior than boys.
"For individuals, it's more problematic, but using minimum thresholds, which medians are, is a correct approach".
For these reasons, the otherwise simple choice of 5 and 3% thresholds becomes problematic (Huse et al., 2010; Marco, 2010) and may result in the overestimation of operational taxonomic units (OTUs).
