Which of the following psychologists first referred to successful human factors engineering as natural design, because it is based on perceptual signals that people understand naturally, without needing to learn them?

People who reduce their fat intake to reduce dissonance associated with diet and heart disease are using which of the following dissonance reducing techniques?

a. behavior change b. attitude change c. rationalization d. distorted perception

The amniotic sac:

a. contains the developing organism and amniotic fluid. b. permits the exchange of nutrients and waste with the mother. c. develops into the umbilical cord. d. protects the developing organism from harmful toxins.