The cognitive subtraction method used in neuroimaging studies aims to identify the brain region(s) Involved in s certain task by

The cognitive subtraction method used in neuroimaging studies aims to identify the brain region(s) Involved in s certain task by: A. Subtracting BEG signals across time points to compute an event-related potential, B. Comparing BOLD signal changes between different regions of the brain to determine which region was more strongly Involved. C. Comparing brain activation during a task of interest with that measured during a control task that differs from the task of interest in one critical way, D. Subtracting the mean signal level across the entice brain from the local signal measured in each region, so as to normalize the BOLD effects. E. Subtracting the structural MRI signals from the functional MRI signals to get a different score for each region. 2. Posner, Snyder, and Davidson (1980) examined spatial attention using arrows as a prime. Most of the time the arrow cue pointed to the area where the stimulus would appear, but 20% of the time it did not. They compared reaction times (RTs) when the arrow cue was valid, when it was invalid, and when a neutral cue was presented. Which of the following statements was NOT supported by their findings? A. We can simultaneously attend to two different locations without a reduction in performance. B. Spatial attention is limited in capacity. C. RTs were slower in the invalid condition than in the valid condition. D. RTs were faster for responses to valid cues relative to neutral cues. E. N/A (all of the above were supported by their findings) 3. The Operation Span task: A. measures the number of math problems that can be stored in working memory. B. measures one’s capacity for holding information in working memory while simultaneously working with other material. C. produces working capacity estimates that are highly correlated with general intelligence. D. Both A and B E. Both B and C 4. Which of the following is/are TRUE about electroencephalography (EEG) as a functional neuroimaging technique? A. Its temporal resolution is better than that of fMRI. B. Its spatial resolution is better than PET scans. C. Because it relies on electrical signals, it is good at measuring activity in deep subcortical regions. D. Both A and B E. Both A and C