Research Methods

Last update by Victoria on 01/29/2013
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Answer:
Every member of the population has an equal chance of being selected. Random selection increases the likelihood that the sample represents the population and that one can generalize the findings to a larger population.

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    Stratified Sampling
    A process that allows a researcher to ensure that the sample represents the population on some criteria.
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    Experiment
    Experiments compare at least two groups: an experimental group and a control group that differ based on the independent variables.
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    Confounding Variables
    Any difference between the experimental and control conditions, except for the independent variable, that might affect the dependent variable.
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    Assigment
    The process by which participants are put into either an experimental or a control group.
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    Random Assignment
    A method of assigning participants to conditions such that each participant has an equal chance of being placed into experimental groups.
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    Experimenter Bias
    The unconscious tendency for researchers to treat members of the experimental and control groups differently to increase the chance of confirming their hypothesis.
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    Double-Blind Procedure
    Method followed such that neither the participants nor the researcher are aware of who is in the experimental or control groups while the experiment is going on.
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    Participant Bias
    Tendency for subjects to behave in certain ways based on their perception of an experiment.
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    Hawthorne Effect
    Being selected to be in a group of people to participate in an experiment will affect the performance of that group, regardless of what is done to those individuals.
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    Correlation
    A statistical measure of a relationship between two variables. Correlation does not imply causation: Just because two variables are correlated does not mean that one variable causes the other.
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    Scatter Plot
    A graph of correlated data. The closer the points come to falling on a straight line, the stronger the correlation. A line that slopes upward, from left to right, indicates a positive correlation. A downward slope evidences a negative correlation.
Research Methods
Research Methods
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