Outline+principles+that+define+the+biological+level+of+analysis

Principles of the biological level of analysis
 * behavior can be innate because it is genetically based
 * animal research can provide insight into human behavior
 * there are biological correlates of behavior

The biological level of analysis argues that there are physiological origins of many behaviors, and human beings should be studied as biological systems

Many physiological factors can play a role in behavior:brain processes, neurotransmitters, hormones, and genes

Physiology also respond to environmental stimuli (e.g. stressful experience, an attractive person, or something extreme like brain damage)

Biological researchers often adopt a reductionist approach to the study of human behavior.
 * they break complex human behavior into its smallest parts
 * focusing on the role of a gene, a neurotransmitter, or a protein
 * it is sometimes criticized for being overly simplistic in explaining behavior

One of the major controversies in the history of psychology is the "nature versus nurture debate"
 * researchers debate whether human behavior is the result of biological or environmental factors

http://www.simplypsychology.org/ (This is a link that I thought was quite interesting. It explains some of the theories in a simple way, and even though it says it's designed for A-Level, I believe there are some articles and information that the IB course can also use)