Freud believed that ________ are the "royal road to the unconscious."

Your 5-year-old daughter has really not eaten very much during the past couple of days. You are a bit worried, but after thinking about your developmental course, you remember that 5-year-old children ____

a. rarely eat until their 6th birthday b. sometimes do not really eat very much. She will probably be eating quite a bit tomorrow c. experience serious changes in their taste buds during this time and might avoid eating d. are likely sneaking in snacks between meals. You will need to watch her carefully

When an experiment is designed and conducted properly, cause-and-effect can be determined because

A) the independent variable fluctuates randomly, while the dependent variable is held constant. B) random assignment to groups insures that participants will systematically be different. C) the only systematic difference between groups is due to manipulation of the independent variable. D) participants in all conditions are treated exactly alike except for manipulation of the dependent variable.