Moyle noted that NA was not simply a generic nuisance variable
but rather it played a complex and substantive role within the stress process.
Thus, the age of students should not be seen as a nuisance variable
in evaluating students' overall performance, expectations and satisfaction with a course.
In recent years, researchers examining relationships between work-related stressors and strains have typically controlled for the personality variable negative affectivity (NA) on the basis that NA may act either as a nuisance variable that artificially inflates correlations among self-reported stressors and strains (e.g.
In the case of NA, it does not allow researchers to determine whether correlations between self-reports of stressors and strains are biased because NA acts as a methodological nuisance variable or because its acts as a substantive variable.
Although it is concluded that NA most likely does not act as a nuisance variable, one limitation of the present study is that it does not allow any conclusive statement to be made regarding whether NA relates substantively to the onset and development of strains.
The residual is the "cleaned" time series after subtracting the [L.sup.2] best-fit regression model of the nuisance variables
from the original voxel time series.
Coverage begins with research strategies and the control of nuisance variables
, experimental designs (an overview), and fundamental assumptions in analysis of variance.
[x.sub.p] are included to control for the effects of various nuisance variables
. S-Plus provides a variance estimate for [beta], thus allowing the use of a standard t-test for the significance of the effect of [x.sub.1].
7 RANDOMIZED EXPERIMENTS HELP WITH UNKNOWN NUISANCE VARIABLES
This seems to me to betray a misunderstanding of the point of randomized experiments.(6) Randomized experiments are important, not because they help wit the nuisance variables we think we know about, but because they enable us to cope with all those we don't know about.