During toddlerhood, where is the peak production of new synapses?

Which of the following research topics would be most interesting to a psychologist who favors the situated-cognitive approach?

a. When working on a geometry problem, do people solve the problem more quickly if they are shown a diagram, in addition to the verbal form of the problem? b. On a problem requiring a matrix solution, are people faster at solving problems if they have already tried several easier versions of the problem? c. On a math problem requiring symbols, does the amount of irrelevant information influence the accuracy of the solution to the problem? d. What kind of strategies do college students use when trying to solve the problem of getting a ride to their hometown for a vacation?

A man and woman are farm workers. The man is paid every week for his work, while the woman is paid for every two bushels of fruit she picks. The man is under a ________ schedule of reinforcement and the woman is under a ________ schedule of reinforcement

a. variable-ratio; fixed-interval b. fixed-interval; variable-ratio c. fixed-ratio; fixed-interval d. fixed-interval; fixed-ratio