PSYC 6 Lecture Notes - Lecture 3: Confounding, Experiment, Informed Consent
Document Summary
Finding the relationship between two variables without being able to infer causal relationships. Two variables are both increasing or both decreasing (same direction) One variable rising, the other is falling (opposing directions) Higher scores on one variable associated with higher scores on a second variable. Higher scores on one variable associate with lower scores on a second variable. Use the predictor variable (x) to predict the criterion variable (y) Pearson"s r, spearman"s rho, phi, coefficient (r squared) Research in the 1970s found that the use of birth control was correlated with the amount of appliances in the home. No, it means that if you can afford birth control, you can most likely afford more appliances. Correlation is not causation! in the house (socioeconomic status variable) Correlated but because of some other variable that explains that correlation (confounding variable) 3 possible causal relations when a correlation is found.
