Methods of control, data analysis and data presentation

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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