Howtosignalprocessing
What is random noise in psychology?
Noise is random variation that exists in all conditions of an experiment. It is not a confound. It is not a threat to internal validity.
What is a person confound?
A person confounding occurs when two or more groups of units are analyzed together (e.g., workers from different occupations), despite varying according to one or more other (observed or unobserved) characteristics (e.g., gender).
What is an operational confound?
An operational confound can occur in both experimental and non-experimental research designs. This type occurs when a measure designed to assess a particular construct inadvertently measures something else as well. A procedural confound can occur in a laboratory experiment or a quasi-experiment.
