PSYC 2360 Lecture Notes - Lecture 4: Pearson Product-Moment Correlation Coefficient, Relational Aggression, Headache

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2360
• Professor: Ian Newby- Clark

Document Summary

Recall that there are 3 major research designs: explanatory, predictive (correlational, descriptive. This (cid:449)eek (cid:449)e"re goi(cid:374)g to talk (cid:373)ore a(cid:271)out (cid:272)orrelatio(cid:374)al desig(cid:374)s. Correlations are used to measure and describe a relationship between two variables. Usually these two variables are simply observed as they exist in the environment; there is no attempt to control or manipulate the variables. Researchers interested in tv viewing in teenagers might record the number of hours of. Researchers interested in the health of long distance runners may record the number of km run each week and the number and types of illnesses for a group of runners. Correlations require two scores for each individual: one from each variable (x and y) E. g. , researchers interested in the health of long distance runners may record the number of km run each week (x) and the number of illnesses (y) for each runner. Correlations can be classified into 2 basic categories: positive and negative, one increases or negative.