The trial after which the flies make their first stop predicts the upcoming pattern of habituation.

<p><b>A.</b> Average firstSTOP for the flies that started responding on the first two trials following 1–4 hfd. <b>B.</b> Average totalPER increases with firstSTOP. <b>C-D.</b> Habituation curves for homogenous subsets of firstSTOP (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.