Among Rothbart's measured dimensions, which of the following showed the greatest consistency during the first year of life?

The glands in the endocrine system release:

A. Neurotransmitter B. Gonads C. Hormones D. Chemical messengers

According to the authors of your text, why would people experience cognitive dissonance after investing a lot of time and effort in pursuit of a goal that falls short of their expectations?

a. Punishment serves to reduce intrinsic motivation. b. Heightened intrinsic motivation biases people's perceptions. c. Actually, people would not experience cognitive dissonance in this situation. d. Sensible people don't work hard to attain something trivial.