Temperature dependence of the stretching parameter for Salol. The stretching parameter for the longtime part of the total structural relaxation, ø(t), obtained from experiments (6) (black squares) and (7) (black circle) and that calculated from the present coupled theory, βtotal (red diamonds), are plotted against temperature. In the same plot we also present the stretching parameter predicted by the RFOT theory by using the static barrier height distribution, βhopstatic (blue dashed-dot line) and the MCT, βMCT (green dashed line) (which shows no temperature dependence).