Participants' responses on the neutral cue condition measure their ability to discriminate color saturation and contrast discrimination under distributed attention conditions (i.e., in the absence of covert exogenous attentional shifts to the stimuli location).
Critically, cross-condition classification in both FFA and VWFA revealed significantly above-chance accuracy for all stimulus categories, suggesting similar spatial neural representations across different attention conditions.
In Study 1, 18 healthy young adults completed letter discrimination tasks during single and dual attention conditions designed to manipulate response certainty.
We addressed this issue by examining whether the spatial pattern of neural representations for certain stimulus categories in these regions would change under different attention conditions.
AOAs occurred reliably in auditory attention conditions and were enhanced during attention to unimodal auditory sequences and during the more difficult auditory-attention conditions with low-intensity sounds.
As a result, they could receive different performance in different attention conditions.
AOAs were not generated by unattended sounds during visual attention conditions, regardless of sound intensity, location or frequency.
On average, a total of 476 trials were retained overall, with no difference between attention conditions (i.e., blocks) or experiments.
Attention-related modulations (ARMs) were isolated from BA-BV subtractions: i.e., from blocks containing the same stimuli during auditory and visual attention conditions.
There were a significant differences in activation magnitudes in medial auditory regions in different auditory attention conditions (F 2,16) = 43.61, p<0.0001): activations were larger during the two auditory attention conditions (bimodal and unimodal, mean 0.32% and 0.34%) than during visual attention (0.25%).
For example, tonotopic organization was analyzed to tone patterns of different frequency across 36 different task conditions (two tone intensities, three tone locations, continuous vs. sparse image acquisition, and three attention conditions).
