Biological Perspective

KeyPrinciple

s

PRINCIPLE:There are biological

correlates of behavior

The Brain is our thought center

Chemicals and hormones and their

transmission throughout our body influence

behavior, cognitions and emotions

Physiology

Neuron

PRINCIPLE:Behavior can

be innate because it is genetically-

based.

PRINCIPLE:Behavior can

be innate because it is genetically-

based.

PRINCIPLE:Animal

research can provide

insight into human

behavior

AnimalResearch

•Aim/Research Question•Design◦Method◦Participants◦Procedure

•Results•Conclusion

Are You a Natural?

Twin Studies

•Aim/Research Question

Are You a Natural?

To determine with a reasonable degree of confidence which psychological characteristics appear to be determined primarily by genetic factors and which are molded more by environment.

•Design◦Method◦Participants◦Procedure

Are You a Natural?Qualitative & Quantiative

(interviews, surveys, tests)Identical twins reared

apart1 week visit

4 personality tests3 aptitude tests

occupational inventories2 intelligence tests

Checklist of household belongings

Measurement of parentingLife History InterviewPsychiatric Interview

Sexual History InterviewALL DONE INDIVIDUALLY

•Results

Are You a Natural?

Correlations for characteristics measured were remarkably similar. They were close to 1.00 and no lower than .700 for MZA and MZT identical twin pairs.

•Conclusion

Are You a Natural?

Findings indicate that genetic factors appear to account for most of the variations in a variety of human characteristics. Genetically identical humans reared apart grew into adults who were extraordinarily similar in basic psychology and personality.