Question

Response Questions Part A ToB A. The drug valproate has been shown in mice to facilitate adult learning of skills typically acquired during early life. A study enrolled healthy adult human males with no advanced musical training and taught them to identify absolute pitch, a rare ability typically learned in early childhood. In a first stage, the participants were randomly assigned to valproate or a placebo. In a second stage, the conditions were reversed, so that a participant who received the placebo first took valproate for the second stage, and vice versa. Which type of study design was used? experiment with a block design completely randomized experiment case-control observational study matched pairs or repeated measures experiment B. A study attempts to determine whether a new medication is effective at lowering blood pressure. Forty subjects with hypertension who volunteer to participate in the study are to be given both the new medication and a placebo. The order in which each subject receives the treatment is randomized, and the subjects do not know which treatment they are getting. Each treatment is administered for four weeks. At the end of each four-week period, a subject's blood pressure is recorded What is described in this scenario? a stratified sample a matched pairs experiment a double-blind observational study

Answer 1

Sluhan on:- -Part ση. 6 el blind observahon stuy os toe gam o bore bod expime a double bimd obseswahion