Mother being around. Father being around. getting a cookie. positive
when Teddy asks for cookies, and his is told he cant have any, he screams. when he screams, his mom eventually gives him a cookie. however, his dad never gives him a cookies when he screams. as a result, Teddy is more likely to scream for a cookie when his mom is around. what is the Sd? s-delta? reinforcer? positive or negative reinforcement for screaming?