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Lecture 3 - 03:08 DataCollection , thegroup,

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03:08 Data Collection Where do we get our information? Population- the entire group we wish to study Samples- a subset of the population, rather than study everyone we look at a subset of  the group, who is in the sample has an impact on your findings Representative sample- all of the members of the sample match the larger population  so that it looks the same, same percents male/female etc., best thing to have but  impossible to get Random Sample- everyone in the population has an equal chance of being able to be in  the sample, will look like the population because it is random Convenience sample- we recruit people who are available, realistic Biased sample- any sample that is not a random sample, not bad What data do we collect? Operational definition- how we define what we are studying in our research Measure- what we use to collect information about each phenomena  Observation Goal is description Naturalistic Observation- goal is to describe a certain phenomena, people are observed  in their natural surroundings, animals or humans Survey-(interviews and questionnaires), advantage is that it can be given to a lot of  people and is fast, but only get data about what you ask
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  • Fall '06
  • Roberts
  • animal research, findings Representative sample­, Naturalistic Observation­ goal, Selective Attrition­ people

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