Research Methods Flashcards
(39 cards)
What is an aim?
A general statement of what the researcher intends to investigate
The purpose of the study
What is an hypothesis?
A clear, testable statement that states the relationship between the variables to be investigated
What is a directional hypothesis?
States the direction of the difference of relationship
What is a non-directional hypothesis?
Does not state the direction
What is operationalisation?
Clearly definition variables in terms of how they can be measured
‘To investigate whether drinking energy drinks makes people more talkative’
Aim or (directional/non-directional) hypothesis?
Aim
‘People who drink SpeedUpp become more talkative than people who don’t’
Aim or (directional/non-directional) hypothesis?
Directional hypothesis
‘People who drink SpeedUpp differ in terms of talkativeness compared with people who don’t drink SpeedUpp’
Aim or (directional/non-directional) hypothesis?
Non-directional hypothesis
Is this operationalised?
‘After drinking 300ml of SpeedUpp particiants sat more words in the next 5 minutes than participants who drink 300ml of water’
Yes
What is extraneous variable?
Any variable, other than the IV that may have an effect of the DV if it not controlled.
What are confounding variables?
Any variable other than IV that may have affected the DV so we cannot be sure of the true source of the changes to the DV.
What are demand characteristics?
Participants change their behaviour to present themselves in a good way or because they have guessed the aim of the research
Is age and lighting in the lab a confounding variable or extraneous variable?
extraneous
Is personality a confounding variable or extraneous variable?
confounding
What are investigator effects?
Any effect of the investigators behaviour (conscious or unconscious) on the research outcome (DV). E.g. interaction, design of study
What is randomisation?
The use of chance wherever possible to reduce the researcher’s influence on the design of the investigation
What is standardisation?
Using exactly the same formalised procedures and instructions for all participants in a research study
What is laboratory experiments?
Strengths:
Limitations:
Lab experiments are conducted in highly controlled environments (e.g., classroom)
- High control over extraneous variables
- High internal validity
- Highly replicable
- Low external validity
- Can have demand characteristics
- Low ecological validity
What is field experiments?
Strengths:
Limitations:
In field experiments, the IV is manipulated in a natural, more everyday setting
- High external validity
- Less influence by demand characteristics
- Loss of control over extraneous variables (cause and effect between IV and DV more difficult to establish)
- Hard to replicate
- Ethical issues (unaware of being studied, no consent)
What is natural experiments?
Strengths:
Limitations:
Natural experiments are when the researcher takes advantage of a pre-existing independent variable. IV is natural, not the setting.
- Provide research that may not be undertaken for ethical/practical reasons
- High external validity
- Rare, reducing opportunity for research (natural disasters etc)
What is quasi-experiments?
Strengths:
Limitations:
Quasi-experiments have an IV that is based on an existing difference between people (e.g. age, gender).
May be confounding variables as cannot randomly allocate participants to conditions
What is validity?
How far a test measures what it set out to measure
What is internal validity?
The extent to which we can testify that the IV has effected the DV due to the high level of control
What is ecological validity?
The extent to which the results can be applied to real life