In experimental research,categorical variables like a subject's gender or ethnicity are known as ____.
A)blocking variables
B)covariates
C)main variables
D)confounds

Question

Quizplus · Accepted Answer

Categorical variables like gender or ethnicity are often used as blocking variables in experimental research. Blocking variables are used to control for variables that may affect the outcome of the experiment but are not being tested as a main factor. In this case, gender or ethnicity may be used to ensure that the effects of the experimental treatment are not influenced by differences in those variables between the experimental and control groups. Covariates are variables that are measured and included in the analysis to control for their effects on the outcome variable. Confounds are variables that are not controlled for and may influence the results of the experiment.

In Experimental Research,categorical Variables Like a Subject's Gender or Ethnicity