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Methods of study that try to DESCRIBE a population

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Presentation on theme: "Methods of study that try to DESCRIBE a population"— Presentation transcript:

1 Methods of study that try to DESCRIBE a population
Descriptive Studies Methods of study that try to DESCRIBE a population

2 Case Study Definition: an observation technique in which one person is studied in depth in the hope of revealing universal principles Examples: Genie the Wild Child Phineas Gage       Anorexia Studies

3 Case Study Advantages and Disadvantages
What’s good about case studies? One person can tell us a lot about humans in general What’s bad about case studies? One case may be misleading!!! “My uncle smoked two packs a day for sixty years and never had health problems!”

4 Survey Definition: asks people to report their behavior or opinions
Examples: Political polling U.S. Census Dane Co. Youth Survey

5 Survey Advantages and Disadvantages
What’s good about surveys? Cheap to administer Gather a lot of information about a lot of people quickly What’s bad about surveys? Wording Effects “affirmative action” vs. “preferential treatment”; “welfare” vs. “aid to the needy” Sampling Error People Lie

6 Naturalistic Observation
Definition: observing and recording behavior in NATURALLY occurring situations We do NOT interfere in naturalistic observations…we simply watch and record! Example: Jane Goodall observing chimpanzees

7 Naturalistic Observation Advantages and Disadvantages
What’s good about naturalistic observation? See authentic behavior What’s bad about naturalistic observation? Can’t interfere at all

8 Limitations of Descriptive Studies
These methods can contribute to overall understanding, but do not show causation. Surveys and observation can show correlation Correlation enables prediction. Correlation does not equal causation! Ice Cream Mystery

9

10 Correlation Correlation can be:
causation (but not the other way around), influenced by 3rd variables pure chance

11 Correlation Coefficient
Scatterplots – illustrate correlation

12 Correlation?

13

14 Illusory Correlation Music that Makes You Dumb – Correlation?

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