correlations

Question 1

A01

Answer 1

a correlation is the measurement of thee extent to which pairs of related values/ 2 variables tend to change together - measuring got see if 2 covairables are related in any way

correlations aren’t a research method in itself but explain the relationship between 2varibles in statistical terms e.g. from either primary data, by the researcher itself or secondary data e.g. hospital records

can be collected from various research method such as observations, questionaries, experiments and analysed to see if there is a relationship between variables

always the use of quantitative data

don’t use iV and DV but coaribales such as sleep and mood

co variables are usually plotted on a scatter graph

Question 2

point 1

Answer 2

strength: high control over ppt variables as both of the covariables are provided by the same set of data and same person / sample therefore reducing effect individual differences on validity of correlation

weakness: although cause and effect cant be established, for example agression and sleep, cant concede that less sleep leads to more agression as haven’t got control other other variables such as diet and age, only a relationship between co variables, circular argument- decreasing validity

Question 3

point 2

Answer 3

can be seen as easily replicable, studies which develop correlational findings often can be easily replicated e.g. via questionnaire, standardised questions therefore can replicate to test for consistency of correlation adding to reliability

Question 4

application

Answer 4

can show a relationship between 2 variables that was not expected which can lead to further research in this field e.g. sleep and agression which can then potentially be scientifically proven through experimentation and help develop scientific developments

although, some correlations may use secondary data which limits the reliability and validity as they may cant be sure exactly what was controlled for e.g. exact standardised procedure and if any bias’s were included decreasing credibility of correlational research

Question 5

evidence

Answer 5

brengen found strong + correlation between agression and MZ twins

Volkow found the extent to which cocaine occupied dopamine correlated positively with the cause if the cocaine high

dabbs et positive correlation between high levels of testosterone and violent criminals