Wednesday, August 18, 2010

Question Hypothesis Experiment Results Conclusions Theory Replication New Questions

 People respond to questions about a subject  Questionnaires or interviews  Problem: Accuracy  1960s toothpaste  Populations and Samples  Bias Target Population Sample

 Testing method  Intelligence, personality, aptitude  Case-study method  Investigation of an individual or small group  Longitudinal method  Observe a group of participant over a long period of time  Cross-sectional method  Observe members from different age groups to avoid the long wait for results  Naturalistic-observation method  Observing people in an every day setting, often unknowingly  Laboratory-observation method  Observations in any place that provides the opportunity for observation or experimentation

 Correlations – how closely related one thing is to another  Height and ability to reach  Stress and health  Grades and extracurricular involvement  Positive v. negative

 Independent variable  The manipulated factor (warm temperature)  Dependent variable  The variable that depends on the manipulated factor (aggression - result)  Experimental group  Receive treatment  Control group  Do not receive treatment  Placebo  A “fake” treatment

 Single – participants do not know if they are in the experimental group or the control group  Double – participants and researchers are unaware of the control groups or the experimental groups

1. Hypothesis 2. 5 volunteers Debriefing: 1. Target population? 2. Double-blind? 3. Independent variable? 4. Dependent variable? 5. Control group or experimental group? 6. Was the hypothesis proved or disproved?