PSYB01H3 Chapter 5: Chapter 5.docx
Document Summary
Reliability refers to the consistency or stability of a measure of behavior. Understanding reliability: any measure that you make can be thought of as comprising two ex. Intelligence or shoe size (consistent) components: (1) a true score, which is the real score on the variable, and (2) measurement error. An unreliable measure of intelligence contains considerable measurement error and so does not provide an accurate indication of an individual"s true intelligence. Can assess stability of measures using correlational coefficients. The pearson correlation coefficient (symbolized as r) can range from 0. 00 to +1. 00 and 0. 00 to -1. 00. A correlation of 0. 00 tells us that the two variables are not related at all. The closer a correlation is to 1. 00, either +1. 00 or -1. 00, the stronger is the relationship. When the correlation coefficient is positive (a plus sign), there is a positive linear relationship high scores on one variable are associated with high scores on the second variable.
