Research Methods Flashcards
What are the advantages of laboratory experiments?
CONTROL - minimising effects of confounding variables
REPLICATION -
CAUSAL RELATIONSHIPS - possible to establish if one thing causes another
What are the disadvantages of laboratory experiments?
ARTIFICIAL - they may lack ecological validity
DEMAND CHARACTERISTICS -
ETHICS - deception is often used
What are the advantages of doing Field experiments?
CAUSAL RELATIONSHIPS - you can still establish these by manipulating the key variable and measuring its effect, although its more difficult to do
ECOLOGICAL VALIDITY
DEMAND CHARACTERISTICS
What are the disadvantages of Field Experiments?
LESS CONTROL - confounding variables are more likely
ETHICS
What are the advantages of Natural experiments?
ETHICAL
What are the disadvantages of Natural experiments?
PARTICIPANT ALLOCATION - you have no control so confounding variables will creep in
RARE EVENTS - some groups of interest hare hard to find
ETHICS - has deception been used? Also has confidentially been compromised?
What are the advantages of Naturalistic Observation?
ECOLOGICAL VALIDITY - participant is unaware of being observed
THEORY DEVELOPMENT - can be useful method of developing ideas which can be funnelled into more controlled conditions later
What are the disadvantages of Naturalistic Observations?
EXTRANEOUS VARIABLES - cant control variables that may have affected behaviour
OBSERVER BIAS
ETHICS - debriefing is difficult. Respecting privacy may be difficult. Getting informed consent may be difficult
What is the advantages of Correlational Research?
CAUSAL RELATIONSHIPS - these can be ruled out if no correlation exists.
ETHICS - can study variables that it would be unethical to manipulate
What are the disadvantages of Correlational Research?
CAUSAL RElATIONShIPS - these can not be assumed from correlation
ETHICS - sometimes causality is inferred from correlation
What are the advantages of Questionnaires?
PRACTICAL - can collect a lot of information quickly and cheaply
What are the disadvantages of Questionnaires?
BAD QUESTIONS - leading or unclear questions may be used
BIASED SAMPLES - the people who will respond to questionnaires may be unrepresentative
SELF REPORT - results may be unreliable because of social desirability bias
ETHICS - confidentiality can be a problem, especially around sensitive issues
What are the advantages of interviews?
RICH DATA - you can get detailed information
PILOT STUDIES - interview are a great way to get information before a study
What are the disadvantages of interviews?
SELF REPORT - can be unreliable and effected by social desirability bias
IMPRACTICAL - time consuming and requires skilled interviewers
ETHICS - confidentiality can be a problem especially around sensitive issues
What are the two types of interviews?
Structured interviews - set list of questions
Unstructured interviews - set of discussion topics only
What are the advantages of Case Studies?
RICH DATA
UNIQUE CASES can challenge existing ideas and suggest ideas for further research
What are the disadvantages of using Case Studies?
CAUSAL RELATIONSHIPS - little control over variables
GENERALISATION - results from single cases are difficult to generalise
ETHICS - informed consent can be difficult to obtain if the subject has a disorder
What are the main topics that you should consider when asked about advantages and disadvantages of different research methods?
Ethics Reliability Replicability Controlling variables Sampling Generalising results Identifying causal relationships
What is a research aim?
This a statement about what the study intends to investigate
What is the research Hypothesis?
This is the statement of what is actually being tested. It is proposed at the beginning of a study
Name the two kinds of Hypotheses
Null hypothesis
Experimental (alternative) hypothesis - these can be…..
Non-directional hypothesis
Directional hypothesis
What is the Null Hypothesis?
This is what you are going to assume is true during the study.
Very often the Null Hypothesis is a reduction that there will be no relationship between key variables
What is the Experimental or Alternative Hypothesis?
If the study forces you to reject the Null hypothesis then you accept your Alternative Hypothesis.
So if your Null Hypothesis is that the two variables aren’t linked then the Alternative Hypothesis is that they ARE linked. OR you can be more specific and fine HOW they are linked using Directional or Undirectional Hypotheses instead
When is a Directional Hypothesis used?
These are often used when a previous study indicates which way a the results will go
When is a Non-directional Hypothesis used?
This would predict a difference but not specify which way. It is often used if there is not a lot of previous search in the area or when the searchers are unsure
What are the three types of variables that may be in an experiment?
Dependant variables
Independent variables
Extraneous (or Confounding) variables
What are Independent variables?
These are variables that are directly manipulated by the researcher.
What are Dependant variables?
The DV is the variable you think will be affected by the change in the IV. So the DV is dependent upon the IV.
What are Extraneous Variables?
Extraneous variables are other variables which might effect the DV
If they DO effect the DV then they are called Confounding variables
What is Operationalisation?
Operationalisation is showing how the variables will be measured.
Some variables are easy to operationalise ( height)
Other variables are harder (a mother’s love)
Name the three most common Research Designs
Independent Research Design
Repeated Measures Design
Matched Pairs Design
What is an Independent Groups Design?
There are different participants in each group
What is the advantage of an Independent Groups Design?
NO ORDER EFFECTS - no one can learn through practice or suffer fatigue effects
What are the disadvantages of Independent Groups Design?
PARTICIPANT VARiABLES - difference between people in each group might affect the result
NUMBER OF PARTICIPANTS - you need twice as many participants as for the Independent Variables Design
What is the Repeated Measures Design?
All the participants do all conditions of the test
What are the advantage of Repeated Measures Design?
PARTICIPANTS VARIABLES - the same people do all parts so no individual differences to worry about
NUMBER OF PARTICIPANTS - you need fewer participants that for the Other two research designs
What is the disadvantage of Repeated Measures Design?
ORDER EFFECTS - because the same participants taking part in all conditions then students could become practiced or suffer fatigue effects
What is Matched Pairs Design?
There are different participants for each condition but they are matched for important variables
What are the advantages of the Matched Pairs Design?
NO ORDER EFFECTS - there are different people in each condition
PARTICIPANT VARIABLES - important differences a minimised by matching
What are the disadvantages of the Matched Pairs Design?
NUMBER OF PARtICIPANTS - need twice as many than for the Repeated Measures Design
PRACTICALITIES - it is time consuming finding participants that match
Why would you choose to run a Pilot Study?
To try out your research design and troubleshoot any problems
How can you control variables so their unwanted effects are minimised?
Counterbalancing Random allocation Keeping Extraneous variables constant Eliminating Extraneous variables Using Standardised Instructions
Why would a Repeated Measures Design use Counterbalancing of variables?
Mixing up the order of tasks in an experiment can solve Order Effects in a Repeated Measures Design
What good does Random Allocation do in a Independant Measures Design?
Random allocation means that everyone has an equal chance of being selected to do either condition - should eliminate bias