Editing Personality (section)

==Biology==
The [[biological basis of personality]] is the theory that anatomical structures such as genes, hormones, or brain areas underlie individual differences in personality.<ref name="Handbook2"|pages=158-186/> This stems from [[neuropsychology]], which studies how the structure of the brain relates to various psychological processes and behaviors. For instance, in human beings, the [[frontal lobe]]s are responsible for foresight and anticipation, and the [[occipital lobe]]s are responsible for processing visual information. In addition, certain physiological functions such as hormone secretion also affect personality. For example, the hormone [[testosterone]] is important for sociability, affectivity, [[aggressiveness]], and sexuality.<ref name="auto" /> Additionally, studies show that the expression of a personality trait depends on the volume of the brain cortex it is associated with.<ref>{{Cite journal |last1=DeYoung |first1=Colin G. |last2=Hirsh |first2=Jacob B. |last3=Shane |first3=Matthew S. |last4=Papademetris |first4=Xenophon |last5=Rajeevan |first5=Nallakkandi |last6=Gray |first6=Jeremy R. |date=30 April 2010 |title=Testing Predictions From Personality Neuroscience |journal=Psychological Science |volume=21 |issue=6 |pages=820–828 |doi=10.1177/0956797610370159 |pmc=3049165 |pmid=20435951}}</ref>