Li always hated having her diaper changed but she loved cake. So, Li's mom decided to use classical conditioning to make diaper changes less miserable. Every time she changed Li's diaper, she would play the same song on a CD and give Li a small bite of cake while she changed her diaper. Now, as soon as Li hears the song, she is happy to have her diaper changed. What is the conditioned stimulus in this case

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