Studying Drinking Speeds

The behaviour of subjects consuming a drink is monitored by attaching a data logger to their glass which
records the movement as a set of time series data. This is a novel way of collecting data which is unobtrusive
and aims to have minimal influence over the behaviour of the subjects. Subjects were asked to consume both
a neutral drink, water, and a drink of their choice in a natural way. The aim of the analysis of this data, is
to determine whether the subjects respond di fferently to their preferred drink. The Viterbi algorithm was
used to analyse each drinking regime as a whole and determine the number and length of sips, whilst change
point methods were used to determine the distribution of the data within each sip. The methods employed
worked e ffectively and identifi ed the features of interest accurately. However, no signi ficant di fferences were
found between the preferred drink and the neutral drink, due to the high within subject variability.