__________ children excel at many motor tasks

Eight-month-old infants placed on a visual cliff would probably:

a. cross to greet their parents. b. hesitate briefly, and then cross to their parents. c. cross quickly to avoid seeing the deep side of the cliff. d. show extreme hesitation or not cross at all.

Factorial designs are preferred because they

a) Test the influence of the treatment and control conditions b) Allow for the analysis of multiple treatment and interaction effects c) Are easier to conduct than other designs like a Solomon four-group design d) Produce the least amount of reactivity to the experimental manipulation