Asked by: Frances Bukoldmusic and audio science and medicine podcasts
Is it important for a study to have high internal validity?
Accordingly, what is the internal validity of a study?
Internal validity refers to how well an experiment is done, especially whether it avoids confounding (more than one possible independent variable [cause] acting at the same time). The less chance for confounding in a study, the higher its internal validity is.
In respect to this, how do you increase the internal validity of a study?
You can increase the validity of an experiment by controlling more variables, improving measurement technique, increasing randomization to reduce sample bias, blinding the experiment, and adding control or placebo groups.
Here are some factors which affect internal validity: Subject variability. Size of subject population. Time given for the data collection or experimental treatment. History.