PSYC 1000 Chapter Notes - Chapter 2.4: Psych, Null Hypothesis, Random Assignment

• School: University of Guelph
• Department: Psychology
• Course: PSYC 1000
• Professor: Paula Barata

Document Summary

Randomization: to ensure groups are the same, random sampling from population & random assignment to groups is best control for extraneous variables (slide 40) Group -> random sampling -> random assignment to group 1 or 2. Bias: researched & participant expectancy effect. Not always possible: deception, animal subjects, vulnerable population. Elderly, children: parents can give consent for kids but if kid says no, then you must listen to them, con dentiality, debrie ng. Are optimistic people healthier than pessimists: researchers measure one variable (gpa) & then another (success in grad school, researcher determines if x & y are related, correlation does not prove causation. Correlation coef cient: ranges from -1 to +1, positive relationship: as x increases y increases, or, as x decreases y decreases, negative relationship: as x increases y decreases, or, as x decreases y increases. Descriptive statistics: set of techniques used to organize, summarize, & interpret data.