A researcher administers a pretest to two randomly assigned treatment groups, gives one group an intervention, and then administers a posttest to both groups.  Which of the following can threaten internal validity in this study?

Interest rates typically follow a __________ pattern relative to economic activity and the default premium typically follows a ___________ pattern relative to economic activity.

In order to get an infant’s attention, a photographer shakes a rattle, which results in the infant turning toward the rattle and smiling.  After numerous uses of this technique, the infant stops responding.  This is most likely due to:

Part III Begins Here: Answer 3 of the following 5 numbered questions @ 16 points each. Select yes if you understand the instructions, and continue the exam.

16-point question 3. Do each of the following. i. Indicate in the space provided if a person should be more or less willing to buy a house under the following circumstances:                a. You just inherited $100,000. ________                b. Real estate commissions rise from 6% to 7% of the sales price. ________                c. you expect Microsoft stock to double in value over the next year. ________                d. prices in the stock market become less volatile. ________                e. you expect housing prices to rise. ________ ii. If mortgage rates rise from 5% to 10 % but the expected rate of increase in housing prices rises from 2% to 9%,      explain if people are going to be more willing or less willing to buy houses. iii.  Calculate the following: a bond with a coupon rate of 4.8% will mature in 5 years. The $10,000 par value        instrument is currently selling for $9,875.   Calculate the current yield on this bond. Calculate the average annual capital gain or loss the owner will incur if the bond is held to maturity. Calculate the approximate yield to maturity on this bond.

You are seeing a family and you notice bruises on the son’s body.  The parents say that their child has been seen by a pediatrician, but that they forgot to mention the bruises to him.  When you ask the parents how the child got injured, the parents say that he “fell down the stairs,” but cannot provide any further details.  The boy is silent and withdrawn and seems afraid of you.  You should

Which of the following could be expected to cause the equilibrium interest rate to rise?

You are holding your friend’s one year old.  Your friend leaves the room and her child continues to smile at you happily, and shows no interest in her mother when she returns.  Most likely, your friend as a parent has been:

Perry and Busey (1984) focus on family factors that contribute to aggression in children.  In particular, they emphasize the role of:

A mother brings her five-year-old son to you for an evaluation.  She reports that since he had an accidental fall where he hit his head, he’s had difficulty with motor coordination.  Your first hypothesis about the part of the brain that may have been injured by the fall is the