correlations Flashcards
Whats a correlation
a way of establishing whether theres a relationship between 2 variables
what else does a correlation assess
the strength of the relationship
define positive correlation
as one variable increases so does the othere
what do correlations measure compared to experiments
the relationship between 2 variables whereas the experiment only measures the dependent variable
define negative correlation
as one variable increases the other falls
define no correlation
no relationship between variables
whats the difference between correlations and experiments
experiments show cause and effect correlations only show a relationship
how do experiments show cause
researcher manipulates IV and measures the change in DV
define correlation coefficient
a number between -1 and +1 that tells us the strength and direction between the 2 co-variables
define co-variables
the variables investigated within a correlation
strengths
provides a starting point for future research
can be tested for reliability due to quantitative data
relatively quick and economical
limitations
may lack validity due to variables being operationalised
doesnt show cause and effect