Differences in stimulus duration do not account for differences in pulsed versus continuous stimuli.

<p>Main effect of stimulus protocol (pulsed vs continuous) for odor stimuli that were presented for the same duration either and the same concentration (<b>A</b>, <b>B</b>); or concentration corrected to 1/5^th to match the total odor delivered (<b>C</b>, <b>D</b>). In panels <b>B</b> and <b>D</b>, the main effect of stimulation protocol for each approach, is shown as a function of concentration to highlight that rates of increase in CR probability as a function of concentration are not significantly different. The Y-axis represents conditioned response (CR) probability. Error bars represent +/-1 SE. Inset letters indicate significant differences between means (Tukeys HSD; p<0.05).