Restriction of range is when the variance in some variable is reduced compared to the true population variance. This lowers the correlation between this variable and other variables. It is a common problem with research on students which are selected for general intelligence (GI) and hence have a lower variance. This means that correlations between GI and whatever found in student samples is too low.
Simpler way to correct for restriction of range?
Simpler way to correct for restriction of…
Simpler way to correct for restriction of range?
Restriction of range is when the variance in some variable is reduced compared to the true population variance. This lowers the correlation between this variable and other variables. It is a common problem with research on students which are selected for general intelligence (GI) and hence have a lower variance. This means that correlations between GI and whatever found in student samples is too low.