Chapter 11 Flashcards
Instinct
is an inherited predisposition to behave in a specific and predictable way when exposed to a particular stimulus
Homeostais
A state of internal psyiological equilibrium that the body strives to maintain
What is Motivation?
a process that influences the direction, persistence, and viour of goal-directed behaviour
Motivation derives from the latin term “to move”
Incentive
Something that “pulls” you towards a goal (ex. Good grades)
An environmental stimuli that pull an organism towarad a goal
Drug use is motivated by the positive incentive value of the drugs effect
EXPECTANCY THEORY
proposes that goal directed behaviour is jointly determined by two factors
- Strength of the persons expectation that particular behaviours will lead to the goal (Expectancy)
- The value the individual places on the goal (Incentive value)
Essentially EXPECTANCY x INCENTIVE VALUE = MOTIVATION
Extrinsic Motivation & Intrinsic Motivation
Extrinsic Motivation
(Performing an activity to obtain an external reward or avoid punishment)
Intrinsic Motivation
(performing an activity for its own sake - because you find it enjoyable)
Humanist Theory (Abraham Maslow)
Abraham Maslow believed that psychologies key motive is our strive for personal growth
He distinguished between DEFIENCY NEEDS (concerned w physical and social survival) and GROWTH NEEDS.
He proposed the concept of NEED HIEARCHY (Progression of needs containing defiency needs at the bottom and growth needs at the top)
Once our basic needs are met, we focus on safety and security
Then SELF-ACTUALIZATION represents the need to fulfill our potential
Self-Determination Theory
A more recent humanistic theory
Focuses on three fundamental needs
COMPETENCE
(Reflects a human need to master new challenges and perfect skills.)
AUTONOMY
(Also self-determination, is satisfied when people experience their actions as a result of free choice without outside interference)
RELATEDNESS
(Refers to our desire to form meaningful bonds with others)
People are most fulfilled w their lives when they are able to satisfy these fundamental needs
Hunger
Satiety: The feeling of being “Full”
Nutritionally rich food seem to produce more satiety more quickly than an equal volume of less nutritious food.
Patients who have had their stomachs removed still experience satiety not only because of intestinal distention, but also because of chemical signals.
The intestines respond to food by releasing PEPTIDES (help terminate a meal)
CCK (Cholecystokinin) is released into your bloodstream by the small intestine as food arrives from the stomach. It then travels to the brain and stimulates receptors in several regions that decrease eating
CCK decreases feelings of hunger
GHRELIN is released into the blood stream by the stomach and small intestine and is now thought to be one of the most important signals for hunger among humans
CCK = FULL
GHRELIN = HUNGRY
Lateral Hypothalamus is a “hunger on” centre
BEHAVIOURAL PERSPECTIVE
Eating is POSITIVELY REINFORCED by the good taste, and NEGATIVELY REINFORCED by hunger reduction
Glucose
Type of sugar that is your body and brains major source of immediately usable fuel
Transported into cells to provide energy
Leptin
Fat cells are not storage cites for fat. They regulate food intake and weight by secreting LEPTIN
LEPTIN is a hormone that decreases appetite
As we gain fat, LEPTIN is secreted into the blood and reaches the brain.
LEPTIN does make us full like CCK, but it may regulate appetite by increasing potency of these other signals.
Paraventricular Nucleus (PVN)
a cluster of Neurons packed with receptor sites for various transmitters that stimulate or reduce appetite.
Obesity
Among canadian chidren, 20 percent are overweight, and 8 percent are obese
Obesity comes with sterotype and prejudice of being lazy, weak character.
Eating is a way to cope w stress
Genes and Environment
Heredity influences our BASAL METABOLIC rate and tendency to store energy as either fat or lean tissue
More than 200 genes have been identified as possible contributors to human obesity
ENVIRONMENT
High-fat cheap food is EVERYWHERE
Cultural emphasis of getting the GETTING THE BEST VALUE
Technological advances reduce the need for daily activity
Dieting and Weight Loss
Being fat primes people to stay fat
Obese people generally have higher levels of insulin (hormone from pancreas) than people with normal weight, which increases the conversion of GLUCOSE into FAT
Why do we have sex?
Peer pressure for adolescents instead of sexual gratification
Most women found sex as an unenjoyable marital duty
Most women find their first sexual intercourse disappointing
About 10% of american man and 20% of american women find sex unpleasurable