Sigmund Freud's primary research approach was __________

Among the following, which is LEAST likely to be considered an aspect of "nurture"?

A) access to adequate nutrition and medical care B) the influence of parents and other significant adults C) genetic characteristics within a family D) cultural background and history

Advanced topic: ?(X–GM)2

A) equals the sum of squared deviations of scores from their group's mean. B) ignores the group a score is in. C) is always smaller than ?(X–M)2. D) is used to determine the grand mean.