PSYC 2022 Lecture Notes - Lecture 5: Partial Correlation, Scatter Plot, Standard Deviation

• School: York University
• Department: Psychology
• Course: PSYC 2022
• Professor: Edward Haltrecht

Document Summary

A numerical value that describes and measures 3 characteristics of the relationship between x and y the direction of the relationship the sign measures direction the form of the relationship linear form = points are in straight line. Most common use of correlation is to measure straight-line relationships the strength and consistency of the relationship. Values between 0-1 indicate the degree of consistency. Prediction alows us to use one variable to predict the oher. Measurement procedure is considered reliable to the extent that it produces stable, consistent measurements. One way to evaluate relaiability is to use correlations to determine the relationship between 2 sets of measurements. When reliability is high, the correlation between 2 measurements should be strong and positive theory verification. A positive correlation indicates that x and y change in the same direction: as x increases, y also increases (sloping up to right) .