Research Methods Year 1 Flashcards
(139 cards)
What is a hypothesis?
What are the 3 types?
Hypothesis- the prediction of the IV & DV or the prediction of the relationship between the variables.
1) directional. 2) non-directional. 3) null.
What is a directional hypothesis?
Another name for it?
Predicting the direction of results (higher, lower, etc).
One-tailed.
need to state where one condition is higher than the other (or lower)
What is a directional relationship hypothesis?
Also directional but is a relationship not a difference (positive, negative).
What is a non-directional hypothesis?
Another name for it?
No direction is predicted but a difference is stated.
Two-tailed.
What is a non-directional relationship hypothesis?
Not directional, there will be a relationship.
What is a null hypothesis?
Where no effect or relationship will be found.
How to remember a ‘correlation’ example?
How to remember an ‘experiment’ example?
If ‘relationship’ is stated.
If ‘difference’ is stated.
How do you use operationalised variables to create hypotheses?
Be very specific with examples: e.g. 200mg of caffeine will get HIGHER RESULTS on a maths test.
What is an extraneous variable? Examples? (4)
Any variable other that the IV that MAY have an effect on the DV if it’s not controlled.
E.g. mood, age, gender, anxiety.
What are confounding variables?
Extraneous variables that varies systematically with IV, so cannot be sure of the true source of change to the DV.
What are demand characteristics?
Cues from the researcher or research situation that could reveal the purpose of the investigation which leads to changes in behaviour.
What is investigator effects?
Any effects of the investigator’s behaviour on the DV (conscious or unconscious).
What is randomisation?
The use of chance to control for the effects of bias (random selection).
What is standardisation?
Where each participant gets the exact same procedure and instructions during the experiment.
What’s the difference between single and double blinded trials?
Single- only participant doesn’t know which condition they’re taking part in.
Double- both participants and researchers don’t know.
What are the 3 experimental designs?
1) independent
2) repeated
3) matched pairs
What is independent group design?
Participants are allocated to different groups where each group represents one experimental condition.
What is repeated measures design?
All participants take part in all conditions of the experiment.
What is matched pairs design?
Pairs of participants are first matched on some variable(s) that may affect the DV. Then one member of the pair is assigned to Condition A and the other to Condition B.
What is random allocation?
An attempt to control for participant variables in an independent groups design which ensure that each participant has the same chance of being in one condition as any other.
What are order effects?
A confounding variable that occurs in repeated measures designs, arising from the order in which conditions are presented e.g. practice effect or boredom effect.
What is counterbalancing?
An attempt to control for the effects of order effects in a repeated measures design: half of the participants experience the conditions in one order (A then B) and the other half in the opposite order (B then A).
What is a laboratory experiment? (3)
1) it takes place in a controlled environment.
2) researcher manipulates IV & records effect on DV.
3) maintain strict control of extraneous variables.
What is a field experiment?
Takes place in natural setting surging which the researcher manipulates the IV & records the effect on the DV.
difference between this & natural is researcher does change IV