What "magic number" did Miller find to be the capacity of working memory?

Explain why it is not possible to assume that a correlation must indicate causation. Relate this to the correlation of depression with the depletion of neurotransmitters

This sounds do confusing! Anyone can help me?

Identify the case below in which the more basic need is listed before the "higher" need, according to Maslow's theory of motivation

a. esteem before safety b. attachment before biology c. self-actualization before affiliation d. affiliation before biology e. attachment before esteem