PSYC 3010 Final Exam Questions and Correct Answers

Describe direction and strength of relation, allow us to make predictions from one variable to another what do correlation methods tell us? Explain correlational methods help us describe and predict behavior but not ________ it. Third variable problem the fact that a causal relationship between two variables cannot be inferred from the naturally occurring correlation between them because of the ever-present possibility of __________________ ___________________ correlation Co-relate correlation can only tell you whether performance of variables _____________ Correlational study no attempts are made to manipulate/control this study, there is the third variable problem Scatterplot a figure that graphically represents the relation between two variables, each dot reflect's a persons relationship between two variables Types of relations (linear or curvilinear), direction of relations (positive or negative), and estimated strength of relations (weak or medium or strong) what can a scatterplot tell you? Curvilinear curved lines Pearson product moment correlation coefficent measures the degree and the direction of the linear relation between two variables High positive relationship when high z scores for x are matched with high z scores for y, and both are positive or both are negative High negative relationship high z scored for x are matched with high z scores for y; one is positive and the other is negative No relationship positive and negative values of zxzy cancel each other out, and ezxzy becomes a smaller number Linear, curvilinear the pearson correlation works best when variables share a _________relation Continuous the pearson correlation is only designed for two ___________ variables 1. Cannot imply causality, "third variable problem" 2. Cannot capture curvilinear relations 3. Affected by restricted or truncated ranges 4. Affected by outliers correlation can be misleading in some situations due to certain 4 factors: