Research Methods - Paper 2 Flashcards
Kind of in all papers
What is an aim?
A statement about the purpose of the research study/why the study is being carried out.
What is a hypothesis?
A clear, precise and testable statement that allows the researcher to predict the outcome of an investigation
What is a null hypothesis?
Predicts no difference between variables. Predicts any difference will be due to chance
What is an experimental hypothesis?
Predicts a significant difference or that the IV will cause a change in the DV
What is a correlational hypothesis?
Predicts a significant relationship or correlation between two variables
When should you use a directional hypothesis?
When predicting a difference and there is previous research to indicate an outcome
When should you use a non-directional hypothesis?
When predicting a difference and there is NO previous research to indicate an outcome
What is a directional hypothesis?
Predicts the direction of the difference e.g., one condition will perform better or worse than another. These hypotheses are used when the researcher is confident of the likely result
What is a non-directional hypothesis?
Does not predict the direction of the difference just simply states that there is a difference between conditions. These are used when the researcher is less confident of the result
What is an example of a non-directional hypothesis?
There will be a significant difference in the DV between those who IV
What is an example of a directional hypothesis?
Participants (Condition 1 of IV) will be (DV - faster, higher, more, less et.) than participants (Condition 2 of IV)
What is an example of a null hypothesis?
There will be no difference between the two conditions
What are extraneous variables?
Any variable other than the IV which might influence the DV. Researchers try to control these so they don’t effect the DV
What are the two main extraneous variables?
Situational and participant
What are situational variables?
Any aspect of the research situation other than the IV that might influence participant’s behaviour/results (DV)
What are participant variables?
Any characteristic or traits of the participant other than the IV that might affect the results (DV)
What are confounding variables?
A variable that does affect the DV in a study which are uncontrolled.
E.g., if researchers wanted to test the effect of background music or silence on homework performance using two different groups of pupils, they would need to control extraneous variables such as age and homework difficulty. If participants in one condition were more intelligent this would be a confounding variable.
What are demand characteristics?
Clues of the experimental situation which help a participant to guess the experimenter’s aim of the study and as a result, participants change their behaviour and are no longer behaving naturally
What are investigator effects?
Any unwanted influence of the investigator on the DV (research outcome) e.g., personality, gender, age, facial expressions, leading questions. The researcher may also be biased when selecting participants
How do we overcome research issues?
Randomisation, standardisation and single or double blind procedures
What is randomisation?
Method used to minimise effect of extraneous/confounding variables. Prevents investigator effects in the allocation of participants and reduces unconscious bias.
What is standardisation?
All participants should be subject to the same environment, information and experience. To ensure this, all procedures and instructions are standardised and kept the same
What are single blind procedures?
Demand characteristics can be controlled. This is where participants are unaware of the research aims and hypothesis and do not know which condition they are in
What are double blind procedures?
Where both researcher collecting the data and the participant are unaware of the aims and hypotheses to prevent demand characteristics