During toddlerhood, ______________________________
a. those who know each other well usually engage in solitary play rather than other forms of play
b. friendships are based on companionship, mutual affection, and emotional closeness
c. there seems to be no preference for play partners; they play equally with whatever children are present
d. children are not yet capable of engaging in simply social play or cooperative pretend play
Answer: B
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People's feelings tend to be hurt the most when they receive a clear sign from another person that the person ____
a. does not care as much as they do about the relationship b. is not investing as much as they are in the relationship c. is disappointed in them d. is angry with them
What can be done to minimize the effects of selection in experiments that have only one group?
a. make the study easier to complete b. compare the subjects to a group that is their own age and stage of development c. measure the subjects on several variables whose norms are known d. start with a larger group so that drop-outs are not a problem
Which of the following sensory systems can be involved in a case of synesthesia?
a. sight, hearing, smell, taste, and touch b. smell, taste, and sight c. sight, hearing, smell, and touch d. sight, hearing, and touch
A salesperson works for a car dealership for 40 hours per week, but may choose not to work hard all of the time. The dealership's owner cannot observe the salesperson's effort, but can observe the number of cars sold. The salesperson's personal cost of working at the dealership is C(H) = 1,200 + H2, where H is the number of hours during which he works hard. The corresponding marginal cost of effort is MC = 2H. Without any effort, the salesperson will, on average, generate a profit of $1,200. With each hour of high effort, he has a 5 percent chance of selling a car. Each car sale generates a profit of $900. Suppose the owner gives the salesperson $1,200 in base pay plus a bonus of $500 for each car he sells. How many hours of hard work will the salesperson choose?
A. 20 B. 22.5 C. 12.5 D. 25