PSYC 2530 Chapter Notes - Chapter 15: Pearson Product-Moment Correlation Coefficient, Scatter Plot, Standard Deviation

• School: York University
• Department: Psychology
• Course: PSYC 2530
• Professor: Anne Russon

Document Summary

These scores are normally identified as x and y: the pairs of scores can be listed in a table, or presented graphically in a scatter plot. In the scatter plot, the values for the x variable are listed on the horizontal axis and the y values are listed on the vertical axis. A correlation measures three characteristics of the relationship between x and y: 01. The direction of the relationship: the sign of the correlation, positive or negative, describes the direction of the relationship. In a negative correlation, the two variables tend to go in opposite directions. As the x variable increases, the y variable decreases. That is, it is an inverse relationship: 02. The form of the relationship: the most common use of correlation is to measure linear relationships. However, other forms of relationships do exist and there are special correlations used to measure them: 03.