• Experimental designs:
    • Independent groups, repeated measures, matched pairs.
  • Advantages and disadvantages of each experimental design.
  • Target populations, samples and sampling methods:
    • Random;
    • Opportunity;
    • Systematic;
    • Stratified.
  • Advantages and limitations of each sampling method.
  • The use of standardised procedures, identification and control of extraneous variables, instructions to participants.
  • Random allocation, counterbalancing and randomisation.
  • Calculations, including mean, mode, median, range and percentages. Anomalous results and their possible effects.
  • Graphical representations, including bar charts.
  • Research in natural and experimental settings, including advantages and limitations of each.

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