PSYC 1000 Lecture 3: PSYC 1000 02-03 Lecture 2

• School: University of Guelph
• Department: Psychology
• Course: PSYC 1000
• Professor: Paula Barata

Document Summary

Print out course outline* print out notes and write equations* Researcher statistically determines if x and y are related. Two variables stress and illness are correlated. Stress the two variables could have mutual effects illness. Stress a third factor could underlie both stress and illness (poverty) illness. Stress can cause illness, and illness can cause stress. Back and fourth process with a mutual affect. Poverty is a third variable that came in and influenced both variables. Correlations are mathematically described by a correlation coefficient. Coefficient ranges from -1. 0 to +1. 0, sign indicates direction (+ or - ) As x is increasing, y is increasing ex. As x is decreasing, y is decreasing ex. As x is increasing, y is decreasing ex. As alcohol consumption increases, ability to balance decreases. As x is decreasing, y is increasing ex. Show the strength of a relationship between variables. Can be used to make predictions about variables.