Trials to first PER predict the upcoming pattern of habituation.

<p><b>A.</b> Average firstPER following 1–4 hfd. <b>B.</b> Average totalPER scores for the wildtype flies and <i>rutabaga</i> that started responding on trials 1–5+. <b>C-D.</b> Habituation curves for homogenous subsets of firstPER (Scheffe). Habituation curves of <i>rutabaga</i> are plotted in accordance with the subsets identified for the wildtype flies for comparability. Data are collapsed across 1–4 hfd in B-D. Numbers in parantheses indicate sample size.