Figure 2. Proportional improvements in TOJ threshold performance measured for the various stimulus modalities and features as a consequence of different intervening training tasks.

The bars plot group means and error bars show ±1 standard error of the mean. Black bars represent TOJ improvement following visual onset training, white bars, auditory onset training, and grey bars, audio-visual onset training. Asterisks indicate significant threshold improvement (α<.05). (a) Comparison of the generalisability of onset learning within and between stimulus modalities. Triangles signify within-modality improvement. Note that the only instance of between-modality improvement occurred for visual onset tasks following audio-visual onset training. (b) Comparison of the generalisabilty of onset learning to other stimulus features. Whereas visual and audio-visual learning generalised across both orientation and location to visual onset judgments, auditory learning failed to generalise to other frequencies. Note also the lack of generalisation from onsets to offsets.