neither the experimenter nor the subjects know who is receiving the real treatment or the placebo. this type of study is called:

all people shall have equal rights upon birth and ever after. (when referring to the rights of man the declaration of the rights of man only applied to landowning men who were 25 years or older and paid taxes equal to 3 days worth of work and were not servants.

explanation: hope this

answer; (b) knowledge based summaries of our beliefs and feeling about the self in particular domains;

answer; personally distressful;