PSY 370 Lecture Notes - Lecture 33: Confidence Interval, Standard Deviation, Psy
Document Summary
Remember that in a speed test, the test-taker doesn"t usually finish all items, but usually gets most if not all of them right. There may not be much variance, and we"re really only interested in measuring around the pass/fail point. Issues that affect evidence of relationships with criteria. *but we can put a confidence interval around it to estimate the range of the true score (standard error of measurement) Reliability tells us what % of the variance in test scores is attributable to error. Not the same thing as the % of any one test score that is attributable to error. But we can use it to get the standard error of measurement. Function of reliability and the standard deviation from one administration of the test (to a group of people) We can interpret the sem as the standard deviation of an individual"s theoretical test score distribution.
