Research Methods Flashcards
Alternative hypothesis
Predicts relationship between variables
Null hypothesis
No relationship between variables predicted
Extraneous variables
Unwanted variables that could affect the dv
Research procedures
Instruction to participants - must be given the same info
Standardised procedures - exact same methods. To try control EV
Randomisation - using chance when designing a study to rule out bias
Target population
Group being studied
Random sampling
Each person has the same chance of being selected
Name out of a hat
+ - of random sampling
+ no bias
- sample may not represent target population
Opportunity sampling
Taking the people who happen to be there
+ - of opportunities sampling
+ quick and cheap
- only represents the population drawn
Systematic sampling
Selecting every nth person from a list of the target population
+ - of systematic sampling
+ Avoids researcher bias
- may end with an unrepresentative sample
Stratified sampling
Selecting participants in the proportion to frequency in the target population
+- of stratified sampling
+ most representative
- very time consuming to sort sub groups
Informed consent
Participants should be told the purpose of the research and that they can leave at any time
Deception
Participants should not be misled about the aim, mild deception can be justified