Psychological Research Methods

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Presentation transcript:

Psychological Research Methods Excavating Human Behaviors

Hindsight Bias The tendency to believe, after learning the outcome, that . Only after Kerry won the Iowa Primary, did people begin to say that Dean was too liberal. What would people say about Kerry if Dean won?

Overconfidence We tend to think we know . 82% of U.S. drivers consider themselves to be in the top 30% of their group in terms of safety 81% of new business owners felt they had an excellent chance of their businesses succeeding. When asked about the success of their peers, the answer was only 39%. (Now that's overconfidence!!!)

Scientific Method Observe some aspect of the universe. Invent a theory that is consistent with what you have observed. Use the theory to make predictions. Test those predictions by experiments or further observations. Modify the theory in the light of your results. Go to step 3.

Hypothesis Have operational definitions. Be replicable. A tentative theory that has not yet been tested. Have operational definitions. Be replicable.

Types of Research

Descriptive Research Any research that observes and records. What is going on in this picture? We cannot say exactly, but we can describe what we see. Thus we have….. Descriptive Research Any research that observes and records. Does not talk about , it just describes.

Types of Descriptive Research

The Case Study Where is observed in depth. What are the strengths and weaknesses of using a tragedy like the Aurora, CO Shootings as a case study?

The Survey Method Used in both descriptive and correlational research. Use Interview, mail, phone, internet etc… The Good- cheap, anonymous, diverse population, and easy to get random sampling ( ).

Random Sampling

Why do we sample? One reason is the the tendency to overestimate the extent to which others share our beliefs and behaviors.

Survey Method: The Bad Response Rate People or just misinterpret themselves. Wording Effects How accurate would a survey be about the frequency of diarrhea?

Naturalistic Observation Observing and recording behavior in . No control- just an . What are the benefits and detriments of Naturalistic Observation?

Correlational Research Detects between variables. Does NOT say that one variable causes another. More Correlations  There is a positive correlation between ice cream and murder rates. Does that mean that ice cream causes murder?

Measured using a correlation coefficient. A statistical measure of the extent to which two factors relate to one another

Experimental Research Explores cause and effect relationships. Constipation Eating too many bananas causes

Steps in Designing an Experiment Hypothesis Pick Population: Random Selection then Random Assignment. Operationalize the Variables Identify Independent and Dependent Variables. Look for Extraneous Variables Type of Experiment: Blind, Double Blind etc.. Gather Data Analyze Results

Experimental Vocabulary Independent Variable: factor that is Dependent Variable: factor that is Extraneous Variables: factors that effect , that are not . Experimental Group: Group exposed to Control Group: Group exposed to IV Placebo: inert substance that is in place of IV in Control Group