Rachel is training her dog, duke, to bark when there is a knock on the door. she already knows that the family cat will make duke bark, so she decides to knock on the door and then open the door to reveal the cat in an effort to condition duke to bark. what is serving as the unconditioned stimulus?

Gettysburg address question. what is the best line from the address? why do you think so?

Which statement about spreading knowledge of diseases and health around the world is correct?

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design