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Lecture 3

PSYC 3420H Lecture Notes - Lecture 3: Libido, Natural Foods, Doritos


Department
Psychology
Course Code
PSYC 3420H
Professor
Fergal O' Hagan
Lecture
3

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Lecture 3 & Chapter Four Tues May 19
Chapter Four
Introduction
Learning Objectives
oDifferentiate between needs and drives
oDescribe the structure of physiological, psychological and social needs
oDescribe the cycle of satiation of needs and explain how the seven core
processes contribute to the cycle;
oDiscuss the homeostatic mechanism and how the seven core processes
are involved in system regulation
oDiscuss how thirst, hunger and sex needs are met through self
regulations;
oDiscuss the three reasons for failure in self-regulation and identify
implications for the organism
Needs
oA need is any condition within the person that is essential and necessary
for life, growth, and well-being
Needs provide fundamental motives
When needs are nurtured ; well-being is maintained and
enhanced
When neglected, creates biological or psychology damage,
which disrupts well being
oStructure
Needs;
Physiological Needs
Thirst
Hunger
Sex
Inherent within the workings of biological
systems
Psychological Needs
Autonomy
Competence
Relatedness
Inherent within the strivings of human
nature and healthy development
Example of psychological damage
Relatedness
Babies not receiving
nurturing, not receiving
Competence:
If you cannot develop
confidence, do not feel agentic
Autonomy :
Feeling oppressed as
a teenager, feeling controlled by
parents

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Social Needs
Achievement
Affiliations
Intimacy
Power
Internalized or learned from emotional and
socialization histories
Activated by environment
Physiological Needs
oThirst
Experience as a conscious motivational state
oHunger
Experience both physically and consciously , driven by short term
(glucostatic) and long term (lipostatic)
oSex
Motives rise and fall due to hormones, cognitive scripts, schemas,
etc
Physiological Need - Drive Behavioural Action Process
o1: Satiated State
Feel full
o2: Physiological deprivation develops gradually
Start to feel hungry when food starts digesting
o3: Prolonged physiological deprivation produces bodily need
Start to feel actual hunger once the food is digested
o4:Need intensifies, gives rise to psychological drive
The feeling of hunger is fully conscious
o5: Goal directed motivated behaviour occurs, attempt to gratify drive
Go get food
o6: Consummatory behaviour occurs
Eat food
o7: Drive reduced
Ate food
7 Core Process
oNeed
Physiological
oDrive
Psychological
oHomeostasis
Ability to self regulate
Ex: Liver
Ex: in hunger, would be normal blood glucose levels
oNegative Feedback
Servile mechanisms
Stops body from overworking, overeating, overdrinking etc
Ex: in hunger, feel full and this stops the eating
process
oMultiple Inputs / Outputs
Drive can arise from multiple sources

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Ex: hunger, food in the environment, satiated by multiple
outputs; Wendy's, Tacobell, etc.
oIntraorganismic Mechanisms
Inside brain & organs, that govern the cycle of physiological needs
oExtraorganismic Mechanisms
Stimuli in the environment that stimulate us towards and away
from certain behaviours
Antecedent conditions prompt behaviours
Drive as an Intervening Variable
Homeostatic Mechanisms
oOverview of the mechanism, as well as the interrelationships between the
7 core processes
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