A double-blind procedure is when one group is given a placebo and the other is given an actual drug

Which of the following procedures requires surgery to implant electrodes into the brain and an embedded box under the collarbone?

a. deep brain stimulation b. electroconvulsive therapy c. prefrontal lobotomy d. transcranial magnetic stimulation

Which of the following provides a likely example of two positively correlated variables?

a) hours spent playing computer games and hours spent outdoors b) average daily temperature and number of people at the beach c) annual number of days missed from work and annual production bonus wages d) number of students an instructor has in a class and time spent with each individual