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Discuss the sample of individuals included in the norming process of the Woodcock-Johnson IV Test of Achievement. Provide an explanation as to why the details of the sample are important in determining the validity of the test.
Confounding Variables
Factors other than the independent variable(s) that are unequal across groups.
Random Assignment
A method used in experiments to ensure that every participant has an equal chance of being assigned to any given group, thereby reducing bias.
Experimenter Bias
A phenomenon that occurs when a researcher’s preconceived notions or expectations in some way influence participants’ behavior and/or the researcher’s interpretation of experimental results.
Placebo Effect
A psychological phenomenon where a person experiences a perceived improvement in condition after receiving a treatment that has no therapeutic effect.
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