The proportion of minutes in which the behavior occurred is shown on the ordinate axis and the minute is shown on the abscissa. Separate analyses are shown for subordinates, dominants against subordinates, and dominants against dominants. Data for the first five minutes came from all 40 tests, while data for the final fifteen minutes came from the 12 tests which were 20 minutes in duration. Curves are smoothed by calculating each point as a 3-point running mean.