PSYC 412 Lecture Notes - Tantrum, Railway Correspondence And Travel Society, Random Assignment
22 May 2012
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If you knew the cause you would be able to cure it. Reliabilty: consistency, are we going toget the same thing if two ppl do it. Validity: measuring what you want to be measuring, ex. Depression measure of depression is showing good construct with other measures, is it agreeing with other measures, is it showing discriminate or divergent validity from measure of dif. construct. Sampling: sample (group with whom i am actually working with) vs. population (group in whom i am interested in general) ex. Working with 500 7th graders in qc-> sample=500 population=7th graders, make sure sample represents the population-> use random sampling to ensure this (equal chance of being selected) External validity: will findings generalize, will the research generalize all population of this group ex. How common is a given problem (how many, a lot of children and adolescents, few ppl) Identify rates of the problem in the population.
