According to Piaget, ____________ is the result of making changes in our existing ways of thinking, and it occurs in response to encounters with new stimuli or events

In patients with major depression, there is some evidence that the difference in efficacy between active medications and placebo may increase after ______ of treatment

a. 8 weeks b. 6 weeks c. 4 weeks d. 2 weeks

The data in the previous question show a much higher incidence of low birth weight babies from mothers who smoke. This finding is likely to be a reliable one because

a. everyone knows that smoking is a bad thing. b. the smokers rate of low birth weight is twice that of the non-smokers. c. the pattern of differences occurs reliably over each of 5 years. d. there is a general increase in low birth weight over the years.