An experiment conducted by a college professor with introductory psychology students from his school as the subjects is most likely to be using a(n) ____ sample

_______________ concluded that his patients' distress was due to conflicts and emotional traumas that had occurred in their early childhood and that were too threatening to be remembered consciously

a. Wilhelm Wundt b. William James c. Sigmund Freud d. E. B. Titchener

Which of the following appears to be TRUE about aggression in children?

a. Aggression tends to be stable between younger and older childhood. b. Aggression tends to diminish with age. c. Aggression tends to increase with age, regardless of sex of child. d. There are no consistencies in terms of aggression and age.