Previous research has shown that patients tend to be reluctant to make negative comments about their overall experience and satisfaction measures provide an unreliable measure of quality [ 87].
Head teachers say the new English Baccalaureate measure is unreliable and that it is unfair to use it now.
It should also be said that if measures are unreliable due to instability or due to measurement error, then such lack of reliability (stability) will necessarily reduce measured correlations between variables.
You don't need a refractometer to explore the power of dilution, though a scale is advisable for getting close to Mr. Hoffmann's sweet spot for coffee, since volume measures are unreliable and the decimals count.
The paradox makes changes in VAP rates alone an unreliable measure of whether VAP prevention measures are truly beneficial to patients and behooves us to measure their impact on patient outcomes before advocating their adoption.
Nevertheless, these were felt to be the best measures because household income can be an unreliable measure in this settings (23).
Also, all-or-none measures magnify measurement errors since "one unreliable component measure will contaminate the whole score" [ 32].
The pedicle sagittal angle was not measured in our current study because of the variation in the technique of measuring this angle among previous investigators making it an unreliable measure [9, 10, 11, 12].
However, parent report is the only real option for such a large population-based study, with objective measures such as overnight polysomnography unfeasible in this context and actigraphy an unreliable measure of behavioural sleep difficulties.
They are, in many cases, driven by a conviction that a child's performance on a standardized test is an inadequate, unreliable measure of that child's knowledge, intelligence, aptitude, diligence, and character — and a still more unreliable measure of his teachers' effort, skill, perseverance, competence, and kindness.
