The "Dull Rats" experiment was done by using a completely randomized design.

MY NOTES In a classic experiment that was designed to test whether the experimenter's expectations could really intuence the results, Rosenthal and fore(16) deely con 12 sperimenter. They each one five rats that had been taught to run a made. They told stof the experimenters that the rats had been bred to do will they were are orig") and to the winter were mare dull and should not be expected to do well. Sure enough, the experimenters who had been told that they had bright at found aming testar superior to towe found by permeters who had been told they had dull rats. Hundreds of other studies have no confirmed the experimenter effect The 'Oull Rats experiment was done by using a completely randomized design (a) What were the treatments in this experiment? (Select all that apolv.) The mate that the rats have to run The 12 experimenters given rats Teling the experimenters they had mare dull rats. The five rats given to each experimenter Telling the experimenters they had maze bright rats. (b) were the experimental units the 60 individual rats or the 12 individual experimenters? Explain The 12 individual experimenters, because we are assigning a participant to the experimenters The 12 individual experimenters, because we are assigning a treatment to the experimenters The 12 individual experimenters, because we are assigning a subject to the experimenters The 60 individual rats, because we are assigning a treatment to the rats. The 60 individual rats, because we are assigning a subject to the rats. (c) How could the experiment have been done using a matched-pair design instead? Give each experimenter 2 rots only, but tell them nothing Give each experimenter 2 rats, and tell 6 experimenters their rats are made bright and the other that their rats are mare Give each experimenter some rats that are claimed to be mare bright and also see that are come to be a dull