If a person is paid at the end of each work day, the reinforcement schedule would be ______

In English class, the teacher calls on Tomas. When he hesitates, trying to find the right words, the teacher quickly calls on Wendy instead. It is likely that

A) the teacher thinks Wendy is bright. B) the teacher doesn't think much of Tomas's ability. C) Tomas's achievement in English will go down over the year. D) All of the above.

In an experiment, some people receive an active drug while others receive a placebo. Neither the subjects nor the people administering the drug know which people got the drug and which got the placebo. This is an example of a(n) ______ procedure

a. single-blind b. double-blind c. alternative hypothesis d. placebo