PSY-2150 Study Guide - Quiz Guide: Simple Linear Regression, Regression Analysis, Scatter Plot

• School: Vanderbilt University
• Department: Psychology (A&S)
• Course: PSY-2150
• Professor: Sandberg Elisabeth

Document Summary

Bidirectionality (two-way causality) problem: ambiguity about whether x has caused y or y has caused x. Correlational (relational) research: involves examining potential associations between naturally occurring variables by measuring those variables and determining whether they are statistically related. Criterion variable: the variable that we are trying to estimate or predict. Cross-lagged panel design: involves three steps: measure x and y at time 1; measure x and. Y again, at time 2; examine the patter of correlations among x1, x2,. Cross-sectional research design (one-shot correlational study): each person participates on one occasion, and all variables are measured at that time. Longitudinal research design: data are gathered on the same individuals or groups on two or more occasions in time. Multiple regression: explores the linear relation between one variable and a set of two or more other variables. Negative correlation: means that higher scores or levels of one variable tend to be associated with lower scores or levels of another variable.