The book says:
0.2 - small
0.5 - medium
0.8 - large
I know that Cohen's interpretation is only a rule of thumb, so I'm not sure if there is a "one" answer.
but what is the interpretation when d is between the values?
Is d=0.3 small? or medium?
Option 1
Range interpretation
0-0.2 meaningless
0.2-0.5 small
0.5-0.8 medium
0.8 > large
Option 2
(0.2+0.5)/2=0.35
(0.5+0.8)/2=0.65
Range interpretation
0-0.35 small
0.35-0.65 medium
0.65 > large
0.2 - small
0.5 - medium
0.8 - large
I know that Cohen's interpretation is only a rule of thumb, so I'm not sure if there is a "one" answer.
but what is the interpretation when d is between the values?
Is d=0.3 small? or medium?
Option 1
Range interpretation
0-0.2 meaningless
0.2-0.5 small
0.5-0.8 medium
0.8 > large
Option 2
(0.2+0.5)/2=0.35
(0.5+0.8)/2=0.65
Range interpretation
0-0.35 small
0.35-0.65 medium
0.65 > large