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Psychology
Research methods
Correlation
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Cards (3)
Experiment vs Correlation
Experiment:
Tests for difference
IV
changes and
DV
is measures
Establishes a cause and
effect
relationship
Correlation:
Association or relationship
No manipulation of
IV
and
co-variables
are measured
Cant establish a cause and
effect
relationship
Correlation
Results are on a
scattergram
Co-efficient of correlation (r) lies between 1 and -1
+1 means a perfect
positive
relationship
-1 means a perfect
negative
relationship
the closer it is to one, the stronger the relationship
Evaluation
Advantages
-Strong
correlations
can be used as a test of reliability
-It can establish a relationship between 2
co-variables
Disadvantages
-
Cause and effect
relationship cant be established as one doesnt necessarily cause the other
-Only identifies
linear relationships
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