PSYB01H3 Lecture Notes - Lecture 5: Quasi, Observational Error, Covariance
Document Summary
Chapter 1 to chapter 5 don"t worry about the interview sections. Review: non-experimental group, quasi not all control variable. Read studies about the topic of interest. Create an original study of the topic of interest. Consistency or stability of a measure of behavior. Score on reading comprehension test = 70. T(ex: t = true score, e = error, x = measure. Every scores there is a true score + any sort of error in the measure: minimize the error. Proportion of true scores in a measure. But characteristic of a measure taken across individuals. Look at variance in scores across subjects. Don"t know true scores, so can"t calculate reliability of true scores must estimate. Assume measured scores (x) related to each other to the degree that they share true scores. Estimate of reliability = correlation between two scores of the same measure. Estimate of reliability: we control the systematic error. But the true score stays the same.
