correlational research strategy

Question 1

correlational research strategy

Answer 1

establishes a relatioship between variables, one group 2 scores, describes the nature of the relationship, no manipulation, does not determine cause and effect

Question 2

information from a scatterplot

Answer 2

direction : +/-
form: linear/monotonic
strength: correlation coefficient =+1 or -1

Question 3

pearson correlation r

Answer 3

plot numerical scores: quantative variables
interval or ratio scale
used for relationship of linear related variables

Question 4

spearman correlation p

Answer 4

used for monotonic variable relationships, transform the data and arrange by its rank order

Question 5

statistically significant correlation

Answer 5

coefficient of determination, % of change in one variable accounted for by changing the other variable => shared variance :r^2

Question 6

test re-test reliability

Answer 6

function of correlational research, scores at time 1 must be the same as scores at time 2

Question 7

concurrent validity

Answer 7

function of correlational research, use correlation to show that a new test is as reliable as the established one

Question 8

divergent validity

Answer 8

function of correlational research, to assess opposing constructs, expect strong negative correlations between score from each group

Question 9

advantages of correlational research strategy

Answer 9

high exterval validity: recording what exists naturally, no manipulaiton of any variables

Question 10

disadvantages of correlational research

Answer 10

correlation does not mean causation , directionality problem: relationship may exist is not clear which causes the other