Fig. 1.

Predictions of the perceptual template model. Performance is plotted as a function of external noise for attended (solid curves) and unattended (dashed curves) conditions. Performance could be a behavioral measure or the accuracy of fMRI pattern classification. A: pure amplification is evidenced by an attentional benefit at low noise levels, but no effect at high noise. B: pure noise filtering is evidenced by an attentional benefit at high levels of noise, but no effect at low noise levels. C: if both amplification and noise-filtering effects are present, then attention is expected to increase performance accuracy across all noise levels.