Originally published on July 13, 2013
Here is an excerpt:
Brain mapping experiments all share a basic logic. In the simplest type of experiment, researchers compare brain activity while participants perform an experimental task and a control task. The experimental task might involve showing participants a noun, such as the word "cake," and asking them to say aloud a verb that goes with that noun, for instance "eat." The control task might involve asking participants to simply say the word they see aloud.
"The idea here is that the control task involves some of the same cognitive processes as the experimental task, in this case perceptual and articulatory processes," Jack explained. "But there is at least one process that is different - the act of selecting a semantically appropriate word from a different lexical category."
The entire article is here.
The original paper is here.