research methods Flashcards
What is one tailed hypothesis (directional)?
States exactly what kind of difference or relationship there will be between two variables
What is two tailed hypothesis (non-directional)?
does not try to predict what that difference will be – just that there will be a difference
What is null hypothesis?
The null hypothesis suggests there will be no effect on the DV due to the IV, and that any difference or effect from the study occurs by chance
Is this directional, non-directional or null?
“There will be a significant difference in reaction times in a driving simulator between participants that have eaten chocolate and those that have not”
non - directional
Is this directional, non-directional or null?
“Caffeine will have no affect on performance in a memory recall task, and if it does, it is purely by chance”
null (the difference will happen by chance)
When there is little or no research or it is ambiguous, what is the best hypothesis to use?
Non - directional
What is an aim?
A clearly phrased general statement about what the investor intends to research
What is a hypothesis?
a precise testable statement including levels of the independent and dependent variable
What is operationalisation?
Variables that are carefully stated, demonstrating exactly how they are measured
True or false, hypotheses are predictions
false
What are the two alternate hypotheses?
- directional
- non-directional
What is falsifiability?
Any theory, even one with significant evidence has to be open to new research being found that contradicts the theory
What should you say instead of “proves”?
‘evidence supports [name of theory]
