PSYC31H3 Lecture Notes - Lecture 2: Standard Deviation, Neuropsychology, Criterion Validity
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Disclaimer: neuropsychology is used to assess cognitive functioning and can be used to help formulate a diagnosis, providing a diagnosis to a patient is a protected act. Interpreting scores must be conducted by a neuropsychologist. How to standardize a score: example. We first need to compare this score to the normative sample. ) score = (cid:894)patie(cid:374)t"s score mean)/standard deviation. Make sure demographic of the patient matches the demographic of the. The normal distribution normative sample: the normative data should come from a normal distribution of scores, why. The mean and sd come from the normal distribution. Also on a normal distribution the mean, median, and mode are the same. Selecting appropriate normative data unlike other distributions: selecting the normative dataset should be done a priori. Not always norms available: large samples are ideal (at least n=200, date of norming (usually have a lifespan of 15-20 years) Flynn effect: two schools of thought when selecting norms.
