Figure 7.

The principle of inverse effectiveness was acquired despite exposure being confined to only one invariant pair of cross-modal stimuli. Shown are the responses of this neuron to three relative intensities (low, medium, high) of modality-specific and cross-modal stimuli. As stimulus effectiveness (i.e., intensity) increased, so did unisensory and multisensory responses. However, the former increased proportionately more than did the latter, thereby decreasing MSI. Conventions are the same as in prior figures.