P3: Stress Flashcards
What is General Adaption Syndrome?
Seyle’s explanation of the body’s response to any stressors. The response goes through three stages.
What are the three stages of GAS?
- Alarm Reaction
- Resistance
- Exhaustion
What happens at the alarm reaction stage?
The immediate response- shock. Body’s resources are briefly decreased before quickly recovering. Physiological systems are activated in preperation for fight or flight.
What happens at the resistance stage of GAS?
The body attempts to adapt to the stressful environmental demands by resisting the stressor. Physiological activity is greater than normal, using a lot of energy. The individual appears to be coping but the body’s resources are being used at a potentially harmful rate.
What happens at the exhaustion stage of GAS?
Adaption to the chronic stressor is now failing. The body’s resources have become drained, resistance plummets. Individual begins to re-experience the symptoms of sympathetic arousal that appeared in the alarm stage. Adrenal glands may be damaged. Stress related illnesses are now likely.
Strengths of GAS:
Research from Seyle’s rats:
Subjected rats to extreme conditions. Found the same responses occurred regardless of the stressor. Response occurred after 6 to 48 hours. Tracked responses through resistance and exhaustion.
Weakness of GAS:
May not be a general response:
Mason replicated his procedure using monkeys. Measured levels of urinary cortisol. Outcomes depended on the stressor. Challenge the validity of GAS.
What is the response the acute stress?
Sympothamedullary pathway
What is the response to chronic stress?
Hypothalamic- Pituitary- Adrenal System
What is the Hypothalamic- Pituitary- Adrenal System?
It controls how the body responds to a chronic stressor. Triggers the pituitary gland to release the hormone ACTH which stimulates the release of cortisol.
What is the sympothamedullary pathway?
Controls how the body initially responds to an acute stressor. The sympathetic nervous system triggers the fight or flight response. This includes the hormone adrenaline and noadrenaline which communicate with target organs in the body such as the heart.
What is cortisol?
Stress hormone. Some of its functions help us to cope with a stressor. Eg. it is a gluocorticoid because it affects glucose metabolism.
Which takes longer SAM or HPA?
The HPA takes longer but can persist for several hours or longer.
What are the sources of stress?
Life changes and daily hassles
How did Holmes and Rahe measure life changes?
Social Readjustment Rating Scale (SRRS):
Measured using LCU’s for each life change on the list.
The higher the value the more adjustment needed= more stressful.
What is a weakness of Holmes and Rahe’s SRRS scale?
Retrospective results.
Participants recalled life changes over the last 12 months.
What did Holmes and Rahe’s SRRS scale find?
Suggested that people scoring under 150 LCU’s were likely to experience reasonable health in the following year.
50% of people who scored between 150 and 300 LCU’s experienced illness the next year. Almost 80% who scored over 300 experienced illness.
What was Rahe’s prospective study on SRRS’s?
Studied US Navy personnel, ppts completed a version of the scale. This covered the 6 months before tour. A total LCU score was calculated for this retrospective period. Once on board every illness had to be reported. After returning an independent researcher reviewed the medical records and calculated an illness score.
What were the findings of Rahe’s prospective study into life changes?
Significant positive correlation (+.118) between the LCU scores for the 6 months and the scores for illnesses aboard. Life changes = a reasonable indicator for later illness.
Why are individual differences a weakness of Life changes?
Life changes do not affect everyone in the same way.
Lacks validity because it doesn’t consider inidivual differences.
How did Laarus explain daily hassles impact stress?
We first engage in primary appraisal when encountering a hassle. If we deem it threatening we then move onto secondary appraisal.
How are hassles and uplifts measured?
Kanner’s Hassles and Uplifts scale.
Assesses how many hassles a person has experienced in a certain time period and their severity.