GAS model

• explanatory power?

  is the ability of a theory/model to explain subject matter effectively.
• the general adaptation syndrome (GAS) model?

  describes the physiological changes that the body automatically goes through when it responds to stress.
• Stages of GAS model?

  3 stages

  1. Alarm reaction (Shock/Countershock)
  2. Resistance
  3. Exhaustion
• alarm reaction?


  first stage of the general adaptation syndrome, in which we become aware of the stressor
• shock?


  first phase of the alarm reaction stage in which the body’s ability to deal with the stressor falls below normal. lowering of body temperature and blood pressure
• countershock?


  second phase of the alarm reaction stage in which the body’s ability to deal with the stressor rises above normal. flight - fight - freeze response occurs to deal with stressor causing adrenaline and cortisol to be released. pupils dilate, increase in heart rate and breathing rate
• resistance stage?


  the stressor persists, and the body’s resources are maximised to cope and adapt over time. cortisol levels are at the highest and immune system functioning is impaired with cold and flu symptoms
• exhaustion stage?


  the continued depletion of energy stores and high levels of hormones such as cortisol decrease resistance to the stressor and impair the immune system. this leads to susceptibility to physical conditions infection and stomach ulcers.
• strengths and limitations of GAS model?


  strengths

  • recognises relationship between chronic stress and illness
  • provides objective, empirical information about the biological processes involved in the stress response.

  limitations

  • based on research conducted on rats, reducing the generalisability of the model to the human population.
  • The GAS only focuses on the biological

  aspects of stress, ignoring psychological factors