PSYC 101 Lecture Notes - Lecture 4: Observer-Expectancy Effect, Confirmation Bias, Scatter Plot

• School: UBC
• Department: Psychology
• Course: PSYC 101
• Professor: Steven Barnes, Grace Truong

Document Summary

Pre-existing beliefs infl our view and integration of new evidence. It is statistically proven that storks deliver babies! (let"s investigate further) Hypothesis: the less people sleep, the more stressed they are. Correlation: is the variation in both variables synchronized (when they vary in a systematic way with each other) Graphic rep of the relationship of two variables. Positive: vary systematically in same direction (positive slope) Negative: vary systematically in opposite directions (negative slope) The closer to -1 or 1, the more perfect the correlation. Fixed change in one variable will lead to another fixed change in the other variable. The closer the points are to the trend line, the stronger the correlation. 2 c are correlated only bc each is causally related to a third variable. Eg. the bigger the country, the more storks, and the bigger the country, the more babies. How do we know if an observed correlation is causal>