Research planning

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  • Created by: pomfretg
  • Created on: 09-12-14 09:09
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  • Research methods
    • Variable: Anything open to change
      • Independent variable: something the researcher changes
      • Dependent variable: Something that is measured to see if it has changed.
      • Extraneous variable: A variable that could affect the DV if not controlled (not the IV)
      • Standardisation: a way of controlling an extraneous variable
    • Hypothesis: A statement predicting the outcome of research
      • Null hypothesis: A statement that predicts no difference or correlation in results.
      • Alternative hypothesis: A statement that predicts a difference or correlation in results
    • Experimental design: A way of allocating participants to conditions in an experiment.
      • Independent groups: An experimental design in which the participants are different for each condition
        • Advantage: No order effect because different participants are used for each condition.
        • Disadvantage: Different participants are used, so any differences in the conditions could be because of individual differences
    • Target population: The set of people that the researchers want to generalsie thier results to
      • Sample: A smaller group selected from the larger population
        • Representative: An accurate reflection of a larger group
          • There are two main sampling techniques.
            • Random sampling: Everyone in the target population has an equal chance of being picked.
              • Advantage:Is not biased so gives more representative samples.
              • Disadvantage: Possibility of drawing an unusual sample. Not always practical.
            • Opportunity sampling: A sample drawn from the population that is available and convenient
              • Untitled
              • Advantage: Quick and easy. The researcher selects people that are available, convenient and willing to take park


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