1-A correlation coefficient of 0 indicates:

		a positive correlation between variables.
		an inverse relationship between variables.
		a possible causative relationship.
		no relationship between variables.

2-Relatively few complex human behaviors are governed by a single pair of genes. Most traits are the result of ___________ principles of inheritance.

Interactive

		spontaneous
		polygenic
		multi-genetic
		polymorphous perversity

3-In the final analysis, most developmentalists tend to believe that:

		nature is more important than nurture.
		development is best explained by the interaction of nature and nurture.
		for the most part, people can't change.
		development is more continuous than discontinuous.

4-One of the highlights of the _______ stage is the development of the structures for all the major organs and basic anatomy.

		placenta
		germinal
		fetal
		embryonic

5-Piaget's model views developmental change from the perspective of _____________ which relates to qualitative changes; On the other hand, Skinner views development in terms of ______, which relates to gradual changes in amount or degree.

		correlation; dependent
		developmental; cohort
		discontinuity; continuity
		continuity; discontinuity

6-The field of behavioral genetics uses all the methods listed below to tease out the effects of genes and environmentEXCEPT:

		studies of monozygotic vs. dizygotic twins
		adoption studies
		case studies
		studies of identical twins reared apart