A high rate of responses on the minimum level is problematic for instruments intended to evaluate small differences between groups or individuals, or changes on individual levels over time [ 28].
"Debt, both domestic and external, as well as other complementary sources, cannot be excluded from Africa's list of development finance policy options … However, Africa's vulnerability to rapidly changing external conditions, including volatile commodity markets and unstable international financial markets, make debt a more problematic financing instrument than necessary," it said.
This was described as problematic for instrument development studies where researchers had to return to ethics committees for further approval on a number of occasions throughout the study, causing delays to the smooth execution of mixed methods research.
This by itself is not necessarily problematic, as these instruments were designed for general applications.
Also, flexibility is necessary to identify potentially problematic items and instruments that require modification.
However, effective targeting in the context of early childhood development is problematic, with many instruments providing poor predictive reliability.
Another source of limitations referred to as anchoring (defining a specific upper anchor that could make comparability across other preference-based instruments problematic) was also anticipated.
That is problematic for any instrument because unless it cools its systems, the heat energy from its own components will swamp the very signal it is chasing.
Unfortunately, selecting an instrument for use in a shoulder trauma population is often problematic because most shoulder instruments were initially designed for use with chronic shoulder pathology patients.
The length and complexity of many fixed-form instruments are problematic and raise concerns about both the burden on respondents and the administration costs [ 14, 15].
