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Lecture 5

Lecture 5 - 18.01.11.docx

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Department
Psychology
Course Code
PSYCH 178
Professor
Lofchie

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18th January 2011
Psych 178 – Lecture 5
The Person as a Machine – mechanical/physical sciences.
Sociobiology – Personal Experience
The theory is much better at the subhuman level because there are many phenomena which are contrary to
the sexual survival theory: homosexuality, suicide, declining birth rates…
The deceit for men is that they are more caring than they actually are and women’s deceit is that “sexual
favours will come later”
One girl’s parents found out her brother was homosexual and started giving her all the resources so that
she can have children and pass on the genes.
oWhy homosexuality has survived has been theorized to be due to the fact that the gene for
homosexuality is connected to a gene that provides protection against some illness – like sickle cell
anemia.
Grandparents are more likely to try to have more children if they have a lot of daughters.
Hugh Hefner marrying the 24 year old – makes sense socioblologically because he is a wealthy high status
male.
Ultimate determinant of behaviour – genetic survival (distal)
We eat so we can survive and then reproduce.
We go to school, get a good job (more resources), attract a mate and then reproduce.
There is no real proof for this but there are many inferences from observations of behaviour.
Physical Sciences – Proximal Determinants of Behaviour
How much do you eat?
How do you predict a grade point average?
What do you have to know to predict whether a person will go eat?
oHunger level
oHow good of a friend they are/nature of relationship
oHow good the food is/food quality
oActivity in progress/alternatives (what he is already doing)/Prior plans
oCost/Who is paying?
First separate the determinants of behaviour and then calculate their influence mathematically.
oMotivation = hunger x incentive –(cost + other plans)
oMotivation = a x b – (c + d)
Experiment
Spinach vs. Ice Cream
Children are expected to run 3 miles an hour for spinach if they have not eaten for 3 hours.
Children are expected to run 10 miles an hour for spinach if they have not eaten for 9 hours.
Children are expected to run 13 miles an hour for ice cream if they have not eaten for 3 hours.
Children are expected to run 19 miles an hour for ice cream if they have not eaten for 9 hours.
oTo see if hunger makes a difference, average the speed for 3 hours and 9 hours: 8 miles an hour (3
hours) and 14.5 miles an hour (9 hours)
oIf incentive makes a difference, children will run faster for ice cream: 6.5 miles/hour (spinach) and
16 miles/hour (ice cream)

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Description
18 January 2011 Psych 178 – Lecture 5 The Person as a Machine – mechanical/physical sciences. Sociobiology – Personal Experience The theory is much better at the subhuman level because there are many phenomena which are contrary to the sexual survival theory: homosexuality, suicide, declining birth rates… • The deceit for men is that they are more caring than they actually are and women’s deceit is that “sexual favours will come later” • One girl’s parents found out her brother was homosexual and started giving her all the resources so that she can have children and pass on the genes. o Why homosexuality has survived has been theorized to be due to the fact that the gene for homosexuality is connected to a gene that provides protection against some illness – like sickle cell anemia. • Grandparents are more likely to try to have more children if they have a lot of daughters. • Hugh Hefner marrying the 24 year old – makes sense socioblologically because he is a wealthy high status male. Ultimate determinant of behaviour – genetic survival (distal) • We eat so we can survive and then reproduce. • We go to school, get a good job (more resources), attract a mate and then reproduce. There is no real proof for this but there are many inferences from observations of behaviour. Physical Sciences – Proximal Determinants of Behaviour • How much do you eat? • How do you predict a grade point average? • What do you have to know to predict whether a person will go eat? o Hunger level o How good of a friend they are/nature of relationship o How good the food is/food quality o Activity in progress/alternatives (what he is already doing)/Prior plans o Cost/Who is paying? • First separate the determinants of behaviour and then calculate their influence mathematically. o Motivation = hunger x incentive –(cost + other plans) o Motivation = a x b – (c + d) Experiment Spinach vs. Ice Cream • Children are expected to run 3 miles an hour for spinach if they have not eaten for 3 hours. • Children are expected to run 10 miles an hour for spinach if they have not eaten for 9 hours. • Children are expected to run 13 miles an hour for ice cream if they have not eaten for 3 hours. • Children are expe
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