Evolutionary Psychology A very basic introduction to the topic This is a tough topic to teach!
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Transcript of Evolutionary Psychology A very basic introduction to the topic This is a tough topic to teach!
Evolutionary PsychologyA very basic introduction to the topic
This is a tough topic to teach!
The Darwin Awards This maybe a bit much for some students.
Use this carefully, after all, a life was lost or someone may have been injured.
The Darwin Awards 2010
To begin with, some definitions:
What is evolution?
What is evolutionary psychology?
What is evolution? Biology’s definition - change in the gene pool of a
population from generation to generation by such processes as mutation, natural selection and genetic drift
Evolution (also known as biological or organic evolution) - the change over time in the proportion of individual organism differing in one or more inherited traits. A trait is a particular characteristic that is the result of gene-environment interactions.
Evolutionary Psychology- the study of the psychological adaptations of humans to the changing physical and social environment, especially of changes in brain structure, cognitive mechanisms, and behavioral differences among individuals.
Peter Gray of Boston College notes this misconception
about evolution: Students may believe that “lower
species” are on their way to becoming humans or that evolution occurs in order to meet future conditions or higher moral purposes.
Reference: Myers, David Psychology Teacher’s Guide, Ch. 3 p.7
Grays says, no! His example is the evolution of beak
thickness in finches on the Galapagos Archipelago.
Over many years of drought, the birds evolved thicker beaks that could crack harder seeds.
Then over years of heavy rains, the same species evolved thinner beaks for eating softer seeds the moisture produced.
What was fit for one situation was not fit in the other.
So, The species did not anticipate
the change in climate by developing characteristics that would meet the situation in advance.
Gray suggests that the evolutionary perspective is useful in raising the “why of behavior” question that is central to the discipline of psychology.
Gray continues to explain
If one can answer the “why” then one can understand the distinction between proximal causation
(immediate inducers of behavior) and ultimate causation (the evolutionary advantage served by the behavior)
Both explanations show how different perspectives are complementary.
Gray also notes That the evolutionary
perspective does not equal psychopathology.
Some behaviors have potential evolutionary value
For example, “Why do young children resist
going to bed?
Are they just being spoiled ?
Well, perhaps not.
In some cultures, bedtime protest is absent. Why?
See article, nytimes.com “A Darwinian Look at a Wailing Baby” P. 112
Some may answer, that the child fears being alone in the
dark
In hunting and gathering days, being alone in the dark was a very real fear.
Children who protested, attracted adult attention and were more likely to survive.
In present day hunting and gathering societies, putting a child to bed alone is child abuse.
Thus, perhaps this behavior is really one that
has evolved for survival.
Reference: Gray, P. (1996) Incorporating evolutionary theory in the teaching of
psychology. Teaching of Psychology 207-214.
Let’s try a few questions
Questions designed by Bernard Weiner to introduce a few basic principles of evolutionary psychology.
Weiner, B. (1992) Human Motivation: Metaphors, theories and research. Newbury Park, CA: Sage Publications
Questions #1-2 1) You are on a boat
that overturns. It contains your 5 year-old and your 1-year old children (of the same sex). The boat sinks an you can save only one. Whom do you choose to save?
5 year old 1 year old
2) That same boat contains your 40 year old and 20 year old children (both of the same sex). Neither can swim. As the boat sinks, whom do you chose to save?
40 year old 20 year old
They Say #1
The 5 year old
Why?
More likely to survive and reproduce
#2
The 20 year old
Why?
More likely to survive and reproduce
The Questions #3-4 3) Have you (or
would you) rather marry someone older or younger than yourself?
#3 The answer depends on male vs. female response
4) Of the following six, which three are most important in the selection of your mate?
Good financial prospects
Good looks
A caring and responsible personality
Physical attractiveness
Ambition and industriousness
An exciting personality
And “they” said MALES: Of the following
six, which three are most important in the selection of your mate?
Good looks
Physical attractiveness
An exciting personality
FEMALES: Of the following six, which three are most important in the selection of your mate?
Good financial prospects
A caring and responsible personality
Ambition and industriousness
To define evolutionary psychology
A branch of biology that studies brains, how brains process information and how the brain’s information processing programs generate behavior.
~as defined by K. Minter, Austin, TX
Why Students Love
Evolutionary Psychology. . .
And How To Teach It
David Buss, PhDUniversity of Texas, Austin
From his article in Psychology
Teacher NetworkFall 2010
Content is taken from the PTN article and other sources quoting Dr. Buss.
Further references my be derived from Evolutionary Psychology: The New Science of the Mind (Buss, 2011)
Dr. Buss states Topics students are
interested in include mate-selection, conflict between the sexes, aggression, cooperation, parent-offspring relationships and status hierarchies
Evolutionary psychology provides a compelling “meta-theory.” (overarching idea to understand all introductory psychology topics)
evolutionary psychology has high interest due to real-world applicability
Main tenets of Evolutionary
Psychology The fundamental basis of evolutionary
psychology dates back to Darwin’s (1859) theory of natural selection which has 3 basic components Variation (individual differences
within a species) Inheritance (passed down reliably
from parents to child) Differential reproductive success
(solves problems of survival)
Evolutionary Psychology has
historically been applied to anatomy
and physiology.
Now the ideas can be applied to psychological, strategic and behavioral adaptations which help to solve the specific problems of survival and reproduction and many issues as well.
To quote Dr. Buss, the main
tenets of evolutionary
psychology are
2) All psychological mechanisms owe their existence, at some basic level of description, to evolutionary processes (scientifically, no other known causal processes exist for creating complex organic mechanisms)
Note: Natural selection- those traits and characteristics that help survival will remain; those that do not help survival will die out over time (be “selected” out)
1) All manifest behavior is a function of psychological mechanisms, in conjunction with environmental and internal inputs to those mechanism.
3) Natural selection and sexual selection (Darwin’s theories) are the most important evolutionary processes responsible for creating psychological adaptations.
More tenets 5) The output of
psychological adaptations can be physiological activity, information that serves as input to other psychological mechanisms or manifest behavior.
7) Psychological adaptations are functional, that is “designed” to solve statistically recurrent adaptive problems confronted by our ancestors over deep evolutionary time. (more on deep time later)
4) Evolved psychological mechanisms can be described as information processing devices (input, decision rules or other transformation procedures and outputs).
6) Psychological adaptations are housed in the brain.
Common misunderstandings about
evolutionary psychology (to name but 2)
This is a false dichotomy. “Learning” and “evolutionary psychology” are not competing explanations, learning requires evolved learning adaptations, at least some of which are specialized for solving distinct adaptive problems.
This misunderstanding stems from a failure to understand that evolutionary psychology provides a truly interactionist framework. Humans show great flexibility precisely because of the large number of evolved psychological adaptations they possess.
#2 Human behavior is a product of learning, not evolution.
#3 If human behavior is a product of evolved psychological adaptations, it means we cannot change it.
Teaching Tools for Evolutionary
PsychologyThe full set of 17 can be found on Dr. Buss’
website www.davidbuss.com
A Few Specific Teaching Tools
1) Convey to students an understanding of “Deep Time.”
Use a spatial metaphor of a football field. Life first evolved at one
end of the field. You would travel a full 99
yards before apes evolved. The genus Homo did not
emerge until the last foot of the field.
Truly modern humans, Homo-sapiens (Cro-Magnons) did not colonize Europe until the last tenth of an inch.
Teaching Tools #5 Use Sexual Selection
Theory to explain the logic of the evolutionary process.
The three components of evolution by selection are variation, inheritance and differential reproductive success.
Variation (originally caused by mutations) provides the raw materials on which selection operates.
Only variants that are inherited, reliably transmitted from parents to offspring, can be selected.
Differential reproductive success because of heritable variants is the “bottom line” of evolution by selection. (This is the final arbiter of which characteristics evolve.)
Teaching Tools # 7 Hammer home the
critical distinction between proximate and ultimate causation.
Proximate causation deals with the immediate causes that trigger activation.
Ultimate causation deals with the evolution of the mechanism and its adaptive function.
Why does Sally develop calluses on her hand? What caused her calluses? (pc) Why did the callus producing mechanism evolve? (uc)
Why did Johnny get jealous? Was someone flirting with his girlfriend? (pc) Why have humans evolved the emotion of jealousy? (uc)
Teaching Tools
#10 Bring in an animal example.
Sometimes it is easier to see things in other species.
Example: Many insects, mammalian and primate species use something called “mate guarding.”
The male will maintain physical proximity to the mates and conceal them from other males Build a fence Move locations Emit scents that cover the
female scent Physically jostle other males
away
Teaching Tools
Do humans ever do anything like this?
Teaching Tools Do humans ever do anything like this?
While each species is unique, humans may use the ability to communicate through language or use some variation in culture to “mate guard.”
Ex: Burkas, check-up phone calls, monitoring email or text messages
Teaching Tools
#12 Use thought experiments.
Buss calls this the “mission impossible” exercise.
To teach the understanding of the logic of inclusive fitness theory, ask students to consider: “Imagine that you are a
gene residing within a body. Your mission is to increase your own replication success (making copies of yourself) relative to competing genes. What would you do?”
What would you do?
1)
2)
3)
What would you do?
1) Influence the body in which you reside.
2) Ensure that the body in which you reside reproduces.
3) Help other organisms that contain copies of you –genetic relatives- to survive and reproduce.
Another example For mating, Buss asks all students to list all
of the qualities women want in a long-term mate.
List all of the qualities men want in a long-term mate
Compare lists.
Another example For the topic of conflict, Buss asks all
students to make a list of all the things that men they know have done to annoy, irritate, anger or upset women.
Make a list of what women do that has the same effect of annoying, irritating, angering or upsetting men.
Could this be studied scientifically?
To quote Dr. Buss, “Evolutionary
psychology has the combination
of a powerful big-picture
theoretical perspective, real-life
applicability and topical intrigue
that captures students’
interest.”
This is one tough topic to teach!