Information processing bottlenecks in macaque posterior parietal cortex: An attentional blink?

Abstract

When two brief stimuli are presented in rapid succession, our ability to attend and recognize the second stimulus is impaired if our attentional resources are devoted to processing the first. Such inability (termed the "attentional blink" in human studies) arises around 200-500 ms following the onset of the first stimulus. We trained two monkeys on a delayed-match-to-sample task where both the location and orientation of two successively presented grating patches had to be matched. When the delay between the two gratings was varied, monkey's behavioral performance (d′) was affected in a way that was analogous to the attentional blink in humans. Furthermore, a subset of neurons in the monkey'..