I think you forgot to give the options along with the question. I am answering the question based on my research and knowledge. The primary concern of developmental psychologists is the <span>changes that occur throughout a person's life span. I hope that this is the answer that has actually come to your help.</span>
George Miller was an important catalyst for the COGNITIVE revolution in psychology.
Cognitive psychology is the scientific study of the mind and the mental functions, including learning, memory, attention, perception, reasoning, language, etc. <span />
<span>A depressant must reduce mental activity and decrease physical activity. A depressant acts by interfering with and reducing the levels of activity in neuro-transmitters. This serves to slow down the chemical processes within the brain which consequently lowers the level of mental activity or arousal. The brain also programs the body to reduce the levels of physical activity in a proportionate manner.</span>
