Attention induced neural response trade-off in retinotopic cortex under load.

This was confirmed in a polynomial regression on the distractor and target ROIs showing a significant linear effect of set size both on the distractor responses (average parameter estimate for the linear effect = −0.164, SEM = 0.054, t(16) = 3.08, p = 0.003 one tailed for V2; average parameter estimate = −0.216, SEM = 0.069, t(16) = 3.19, p = 0.002 one tailed for V3) and on the target responses (average parameter estimate for the linear effect = 0.143, SEM = 0.062, t(16) = 2.36, p = 0.01, one tailed for V2) with a similar trend that approached significance in V3 (average parameter estimate for the linear effect = 0.151, SEM = 0.09, t(16) = 1.57, p = 0.06, one tailed).

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