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Chapter 12: Motivation and Emotion (Motivational States (Why do we act …
Chapter 12:
Motivation and Emotion
Motivational
States
Why do we act or feel a certain way?
Remote Causes
Childhood or past experiences
What is the bridge between
remote causes and behaviors?
Immediate causes?
#
1000s of years of
natural selection
Immediate causes
13 instincts (parenting, food seeking,
repulsion, curiosity, social interaction, etc)
[William McDougal 1923]
Due to the inconsistency in
number of instincts,
instinct solution is
questionable
Shopping instinct?
Probably not
Human beings motivated
by things in the environment
(e.g., spiders spinning webs)
[William James 1890]
5000 instincts
[Luther Bernard 1924]
#
Organism has an internal and an external environment
[Claude Bernard 1813-1878]
External: other creatures,
temperature, available shelter,
food, etc.
Large variations
Internal: salts in the body,
oxygen levels, sugar, etc.
Internal state is
very consistent
(homeostasis) where bodily
conditions are monitored
by sensors
Eating when you're hungry,
sleep when you're sleepy (drive)
This returns the body
to equilibrium
There is "drive-reduction"
which helps explain some
of our motivated behaviors
Thermoregulation
One of the basic motivation
centers
Body temperature
being maintained
so that we're neither
hot nor cold is an example of a motivator
Endotherms (mammals,
birds) stable body temperature
Reflexive temperature
regulation
temp too high: hypothalamus
activated the parasympathetic
nervous system
2.
Ectotherms (fish, reptiiles)
have wide ranges of body
temperatures