Outline 9/17/98

Psychology as a science

Of Levels of Analysis

Scientific Psychology vs. Bubba Psychology

The Goals of Science and the use of Theories and Hypotheses

Biopsychology

Proximal & Distal Causes

The Theory of Evolution

Overview of theory and natural selection

Evolution and brain structure

Evolution and human behavior

 

 


Biological Approaches to Behavior

Proximal Cause--The immediate cause. In terms of biopsychology--current physiological structure and changes.

 

Distal Cause--The remote cause. In terms of biopsychology--evolutionary explanations.

 

 


Charles Darwin

 

 


H. M. S. Beagle

 

 


Natural Selection

Any inherited characteristics that increase the likelihood of survival and reproduction are selected for, and any that decrease the likelihood are selected against

Goldstein, 1994

 

 

 


Four Assumptions of Evolution

Members of a species have characteristics that vary (e.g., beak size in birds).

 

At least some of these characteristics are passed on genetically.

 

Some of these variable characteristics will aid survival (e.g., a tough beak on nutty island)

 

Species produce more offspring than survive to be adults (i.e., some organisms die before procreating).

 

 


Brains across species

 

 


Evolution and Human Behavior: Emotions

 

 


Darwin argues emotions serve communication function

 

 


Facial neuromuscular mechanisms show continuity from higher primates to man.

 

 


Facial expressions in humans bear close similarity to animal responses that originally served a function relating to defense.

 


Some facial expressions closely resemble reflexive reactions to nonsocial stimuli (e.g., foul odor).

 

 


Ekman