_______________ increases across middle childhood

Your friend Elena has been asked to supervise an intervention program that is aimed at preparing disadvantaged children for school. Some people have objected to the program and have said that intervention programs don't work

Based on the results of the Carolina Abecedarian Project do you think that intervention will be effective? Why or why not? What will be an ideal response?

For the majority of the items in any given test, the difficulty index

should be kept at approximately a. .99 b. .50 c. .01 d. none of these, since item difficulty is not a quantifiable value.