why use cross correlation in longitudinal analysis how to measure correlation what is the correlation coefficient in longitudinal data which of the following is a measure of longitudinal correlation what is the correlation coefficient of longitudinal data what is the definition of correlation coefficients in the longitudinal study what is the correlation coefficient in longitudinal data why is cross correlation ignoring time correlation coefficient in longitudinal data why use cross correlation why does correlation need to be measured correlation coefficient in data what is longitudinal correlation coefficient in statistics when using longitudinal data, what is the correlation coefficient? why do you use cross correlation what is the difference between a correlation coefficient and a time-series why use correlation coefficients for longitudinal analysis what variables are included in a longitudinal analysis? what is the purpose of the longitudinal analysis of the longitudinal data what is a correlation coefficient?