Research methods Flashcards
What are extraneous variables?
Nuisance factors that could affect the DV
What are the types of experiment?
Lab, field, natural, quasi
What is a lab experiment?
Positives and negatives?
Where the IV is controlled
Demand characteristics, lack mundane realism
Can control variables
What is a natural experiment?
Positives and negatives?
Naturally occurring IV
Can control demand characteristics
Rare opportunities
What is a field experiment?
Positives and negatives?
Natural environment
Easy to control demand characteristics
Hard to control environmental factors
What is a quasi experiment?
Positives and negatives?
IV is a group characteristic
Depends on the location
Can’t randomly allocate
What did popper find?
Scientific knowledge is falsifiable. Scientists should try to disprove their theories and hypothesis
What did Kuhn find?
Grand assumptions (paradigms) and processed by paradigm shifts
scientific knowledge breaks down when paradigm hits a crisis then increases again once a new paradigm is proposed
What is a one tailed hypothesis?
Directional hypothesis
What is a two-tailed hypothesis?
Non-directional hypothesis, just say there will be an effect
What are the 3 experimental designs?
Independents group, repeated measures, matched pairs
What are wrong with independent groups? How to solve?
Individual differences, randomly allocate
What is the issue with repeated measures? How to solve?
Order effects (familiarity). Counter balance
What is the process on how to counterbalance for matched pairs?
Assess a variable by using a questionnaire, self report etc…
Match them up
Randomly split them into the different groups
What are the different types of sampling?
Stratified, random, opportunity, volunteer, systematic
What is random sampling? Positives and negatives
Randomly selecting
+ easy, quick,
- can miss subgroups
What is systematic sampling? + and -
pick every nth number
+ equal chance of getting picked
- misses out subgroups
What is stratified sampling? + and -
Identify subgroups and then pick randomly
+ generalisable
- time consuming
What is opportunity sampling? + and -
Picking people closest to you
+ quick, easy
- bias, misses out subgroups
What is volunteer sampling? + and -
Advertising the experiment and allow people to sign up
+ easy, quick, people involved want to participate
- misses out subgroups, bias