PSYCH 100 Lecture Notes - Lecture 4: Statistical Significance, Random Assignment, Central Tendency

• School: UMASS-Amherst
• Department: Psychology & Brain Sciences
• Course: PSYCH 100
• Professor: Tammy Rahhal

Document Summary

Used when you want to understand relationships between two things and be able to predict behaviors. Example: hotter a room gets the more students fall asleep. One variable goes up the other goes up. Example: the more outgoing a person is, the more parties they attend. One variable goes up one variable goes down. Example: more drinks the night before an exam the lower your test grade is. Example: number of red sweaters in ones closet isn"t related to gpa. Example: kids watching violent tv vs aggression in kids. Cannot say it causes aggression because maybe kids that are aggressive watch more violent things you cannot determine actual cause. Two things related doesn"t mean they play a role in causation. Example: the more ice cream consumed in a month the more murders occur. Cant say it causes murders because the third variable could be temperature. Example: parental neglect related to both aggressive kids and kids watching violent tv.