As there was no effect of stimulus modality on the opposite connection, the effective connectivity from left to right dorsal frontal regions decreased for words compared with pictures.
In the autonomic condition, only the N1 wave significantly mediated the effect of stimulus intensity on SCRs (N1: βab = 0.007, p = 0.01).
The difference in responding between the S+/CS+ and S−/CS− conditions was confirmed by a significant main effect of "stimulus condition" [F 2,23) = 44.66 p <.001].
But spending declined from December in a sign that the effect of stimulus may be petering out.
In addition, we investigated the effect of stimulus intensity and condition on response amplitudes by calculating a 3 (intensity levels) × 3 (conditions) repeated-measures ANOVA for each brain response.
There was a main effect of stimulus condition (F(1.5,145.9) = 207.41; p < 0.001; ηp2 = 0.68), with generally faster RTs for the AV than either the A or V condition, which likewise significantly differed (all p's < 0.001).
In the perception condition, the N2 and P2 waves significantly mediated the effect of stimulus intensity on pain ratings (N2: βab = 0.003, p = 0.01; P2: βab = 0.004, p = 0.02).
In the HO there was again a main effect of stimulus condition (F(1.4,46.5) = 71.7; p < 0.001; ηp2 = 0.68) that was due to faster RTs to AV stimuli than to either A or V stimuli (p's < 0.001).
To determine the effect of stimulus size on sensitivity of patients with retinitis pigmentosa (RP) as measured by automated static perimetry.
Here we address the issue of stimulus optimization by examining the effect of stimulus parameter variation on BR rate and mixed-percept duration (MPD) in healthy individuals.
No significant effect of stimulus type (LM vs CM) or noise configuration (correlated, uncorrelated, anti-correlated) on piecemeal perception was found.
