None of these studies used individually based measures of exposure, and modeled exposures may have large errors that attenuate effects (Molitor et al. 2006).
Systematic errors that may result in artificial treatment effects opposite to the true situation should be avoided at all times.
The relationship between the effect of errors on mortality, and the preventability of those errors, showed that 44 (66.4%) of the errors that had a moderate effect on death (n = 65, 42.8% of errors), and 25 (75.8%) of the errors that had a major effect (n = 33, 21.7% of errors), were probably or definitely preventable (Fig. 3).
While on the surface the look-ahead effect is very similar to the Baldwin effect, crucially the Baldwin effect is about individual learning, whereas the look-ahead effect is about errors that always produce different proteins from a single gene, at a given rate.
While issues have been reported with microarray spot definitions [16] [18], we believe that our meta-analysis approach mitigated the effects of errors that occur on a single platform since the strength of an association was weighted by its consistency across multiple studies and platforms.
I set up the estimation problem, derive the appropriate asymptotic distribution theory as the number of clusters per stratum tends to infinity and compute asymptotic standard errors that are robust to sample-design effects.
In this report, a simple two-locus linear model analysis is used to detect SNP genotyping errors that are likely due to batch effects.
Furthermore, having data from health care recipients facilitates proper community education programs about medical errors that enable patients differentiate between side effects, normal course of a disease and adverse events resulting from medical errors.
There is, therefore, a potential for exposure measurement error that can lead to effect attenuation and reduced statistical power when measurements from ambient monitors are used as the exposure estimate in an epidemiologic study.
One fundamental error that had far-reaching effects was attributed to Ptolemy an underestimation of the size of the Earth.
