wHAT IS cORRELATIONAL RESEARCH???
cORRELATIONAL rESEARCH
ONE OF THE MOST WIDELY USED RESEARCH DESIGNS IN THE FIELD OF PSYCHOLOGY
YOU EXAMINE THE EXTENT TO WHICH TWO VARIABLES ARE ASSOCIATED WITH EACH OTHER.
DO PEOPLE WHO READ MORE BOOKS PERFORM BETTER IN SCHOOL?1: habit of reading books. 2: performance at school.
IS THERE A RELATION BETWEEN THESE TWO VARIABLES?
pearson's rcorrelation coefficient
magnitude: the strength of the relationship. correlations must be between -1 And +1. correlations closer to an absolute value of 1 represent stronger relationships. valence: the nature of the relationship. correlations can be positive, negative, or zero.
Positive relation
variable 1
Variable 2
one variable changes...
the other one tends to change in the same direction
vs
negative correlations
variable 2
variable 1
the other tends to change in the opposite direction.
As one changes...
variable 2
the other one decreases
variable 1
As one increases...
zero correlations
variable 1
BLUE EYES
No relationship exists between two variables.
variable 2
PERFORMANCE AT SCHOOL
CAUSATION FALLACY
REMEMBER!JUST BECAUSE YOU SEE A CORRELATION BETWEEN TWO VARIABLES, THIS DOESN'T NECESSARILY MEAN THAT THOSE VARIABLES ARE CAUSALLY LINKED.
THANK YOU!
CORRELATION RESEARCH DESIGN
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Transcript
wHAT IS cORRELATIONAL RESEARCH???
cORRELATIONAL rESEARCH
ONE OF THE MOST WIDELY USED RESEARCH DESIGNS IN THE FIELD OF PSYCHOLOGY
YOU EXAMINE THE EXTENT TO WHICH TWO VARIABLES ARE ASSOCIATED WITH EACH OTHER.
DO PEOPLE WHO READ MORE BOOKS PERFORM BETTER IN SCHOOL?1: habit of reading books. 2: performance at school.
IS THERE A RELATION BETWEEN THESE TWO VARIABLES?
pearson's rcorrelation coefficient
magnitude: the strength of the relationship. correlations must be between -1 And +1. correlations closer to an absolute value of 1 represent stronger relationships. valence: the nature of the relationship. correlations can be positive, negative, or zero.
Positive relation
variable 1
Variable 2
one variable changes...
the other one tends to change in the same direction
vs
negative correlations
variable 2
variable 1
the other tends to change in the opposite direction.
As one changes...
variable 2
the other one decreases
variable 1
As one increases...
zero correlations
variable 1
BLUE EYES
No relationship exists between two variables.
variable 2
PERFORMANCE AT SCHOOL
CAUSATION FALLACY
REMEMBER!JUST BECAUSE YOU SEE A CORRELATION BETWEEN TWO VARIABLES, THIS DOESN'T NECESSARILY MEAN THAT THOSE VARIABLES ARE CAUSALLY LINKED.
THANK YOU!