​Martika is an accomplished businesswoman, and has decided t…

​Martika is an accomplished businesswoman, and has decided to retire at the age of 53 years. She has begun taking cello lessons, something in which she has always been interested. While her friends keep telling her that it is too late for her to learn such a complex skill, she has started getting rather good on her instrument. Martika’s midlife development of a new skill demonstrates

​A nursing one-month-old infant may grasp crudely at his mot…

​A nursing one-month-old infant may grasp crudely at his mother’s breast while feeding. That same child at the age of one year will probably easily hold a bottle or cup, placing it to his lips, and then putting it down when he is done. This change in ability to use the hands and fingers demonstrates advances in

​If you wanted to do research that specifically sought to un…

​If you wanted to do research that specifically sought to uncover the reasons for various aspects of behavior and you wanted to study a small number of individuals very intensively over a prolonged period of time, you would most likely conduct _______________ studies.