The basic regression-discontinuity design is a two-group pretest-posttest model

Stephanie had successfully used extinction to eliminate her son's temper tantrums. However, several weeks later, her son threw another temper tantrum. Stephanie should be advised that

a. she should have used an intermittent punishment schedule to stop the temper tantrums. b. spontaneous recovery does occur and to continue ignoring the tantrums. c. she should have used negative reinforcement to stop the temper tantrums. d. her child will outgrow the tantrums in a few years.

Infants who are fed milk-based formulas are more likely to prefer ______ flavors at 4-5 years of age.

A. savory B. salty C. sweet D. sour