1. A method comprising: collecting a plurality of digitized, non-nutritive suck (NNS) pressure samples using a non-nutritive nipple with a pressure transducer; determining a plurality of standard deviations of the plurality of burst data sets, wherein each standard deviation is based on a burst data point value associated with a particular sample of each of a plurality of normalized burst data sets; and summing the plurality of standard deviations to provide a spatiotemporal index (STI) of non-nutritive suck pattern stability, wherein the STI is configured to provide a composite indication of variability of amplitude, and duration of a plurality of portions of the NNS pressure samples.