signal noise and no discrimination under time and frequency shifts. The MSE shares this monotonic sensitivity to signal noise, but the bigger issue is the dependence of there sponse to a time lag on the autocorrelation of the input signal. For periodic and semi periodic signals, the presence of several local minima and maxima could be misleading for prediction verification. The WSSIM1D shares this problem under a time lag, though performs better with signal noise. Strikingly, the WSSIM overcomes both of these issues, indicating the best performance. For jittery phase error, all the metrics perform similarly, and for the higher ordernoise, though the shapes of each metric differ, none is obviously better than the others.