Question

leyPLUS × VileyPLUSty n Power of Help I GNMENT If we have learned to solve problems by one method, we often have difficulty bringing new insi ght to similar problems. However, electrical stimulation of the brain appears to help subjects come up with fresh insight. In a a, 40 to solve an unfamiliar half (control group) received sham stimulation as a placebo. The participants did not know in which group they were. In the control the other 20% of the participants successfully solved the problem while 60% Chi, R. and Snyder, A., "Facilitate Insight by Non-Invasive Brain Stimulation," PLos ONE, 2011: 6(2) (a) Is this an experiment or an observational study? of the participants who received brain stimulation solved the problem O Experiment O observational study pter 2, (b) From the description, does it appear that the study is double-blind, single-blind, or not blind? O Double-blind O Single-blind

Answer 1