Your Turn Answers
Define the key terms
- Opportunity sampling: recruiting participants that are readily available
- Stratified sampling: matching sample characteristics to known population ones
- Between-participants design: using each participant once in only one group
- Within-participants design: using each participant in every group
- Extraneous variables: variables that may influence results but that we are not interested in
Fill in the gaps
- Counterbalancing is the name of the method used to control for order effects.
- A participant whose data is quite different from the other data points could be called an outlier
- If two friends participate in a piece of research together, it could create an issue called non-independence
- Patchy coverage of the IV could increase the Type II errors
- The calculation used to determine a suitable number of participants is called power analysis