State which of the following is an example of a natural manipulation and which is an example of a staged manipulation. a. A researcher manipulates the lighting in a room during a study session (30, 60, or 120 watts).b. A researcher manipulates whether a participant sits next to a polite or a rude confederate in an experimental setting.

__________________ is the process of bone hardening, which is essential for motor

development. a. Cephalocaudal pattern b. Proximodistal pattern c. Myelinization d. Ossification

Gregor, an adolescent, can be characterized by the "big five" personality trait of conscientiousness. Gregor

A) can anticipate that this trait will increase through middle age. B) can anticipate that this trait will decrease through middle age. C) will probably also become more extroverted as he ages. D) will probably become more neurotic as he ages.