Other Variables
A variable may be thought to alter the dependent or independent variables, but may not actually be the focus of the experiment. So that variable will be kept constant or monitored to try to minimise its effect on the experiment. Such variables may be called a "controlled variable" or "control variable" or "extraneous variable".
In quasi-experiments, differentiating between dependent and other variables may be downplayed in favour of differentiating between those variables that can be altered by the researcher and those that cannot. Variables in quasi-experiments may be referred to as "extraneous variables", "subject variables", "experimental variables", "situational variables", "pseudo-independent variables", "ex post facto variables", "natural group variables" or "non-manipulated variables".
In modelling, variability that is not covered by the explanatory variable is designated by and is known as the "residual", "side effect", "error", "unexplained share", "residual variable", or "tolerance".
Read more about this topic: Dependent And Independent Variables
Famous quotes containing the word variables:
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—Paul Valéry (1871–1945)
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