The effects of attention in the brain can be partitioned into changes in sensitivity of in the subject’s criterion. In visual cortex, only changes in sensitivity are seen. Here, Luo and Maunsell show that neurons in frontal cortex are sensitive to changes in sensitivity as well as criterion.
Luo, T. Z., & Maunsell, J. H. (2018). Attentional Changes in Either Criterion or Sensitivity Are Associated with Robust Modulations in Lateral Prefrontal Cortex. Neuron.