Psychology Investigation in to stress.

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Steph Kirkwood

Psychology Investigation

Introduction:

        According to the transactional model, stress is that individual’s vary in their response due to their perception of the stimulus and their ability to cope with it. A mismatch occurs if there is a difference between perception and coping. When the body is stressed, the Autonomic Nervous System (ANS) is responsible for keeping the body stable by controlling the heart rate, perspiration, eye sensitivity, and digestion. This is divided into 2 parts, the sympathetic branch, and the Parasympathetic branch. In the Sympathetic branch, the stressor in the case of the person alerts the ANS and the hypothalamus which releases a Neurotransmitter called Noradrenaline. This then a type of trigger for a number of things to increase the body’s heart rate, i.e. releases sugar from the liver into the muscles to use in the fight or flight situation, increases the contractions of the heart, increases lung function- more oxygenated blood. In the Parasympathetic the stressor is removed, decreasing the systems response, i.e. slows heart rate, stores sugar, and stimulating stomach secretions and digestion.

        There have been many researchers investigating the effects of stress:

Cohen 1991 did research on stress and common cold: -

Three hundred and ninety four participants completed a questionnaire to measure their stress level. Participants listed stressful events experienced over the last year, stated how they coped and noted down how often they felt negative emotions such a as depression. They were then put on the ‘psychological stress index’. Participants were then given nasal drops, which exposed them to one of five common cold viruses. Most showed signs of infection but on one third were judged by a doctor to having the actual cold.

  • Results showed that participants with high stress index was more likely to catch a cold- Direct relationship

Stress is also known to affect the immune system, which Glaser 1986 proved in his research into how the immune system copes in the exam period. Forty medical students had 6 weeks before their exams which students revealed high stress levels. The percentage of T cells showed a significant reduction at the time of the exam.

Holmes and Rahe made on of the first attempts to measure stress, they devised a Social Readjustment Scale (SRRS) in 1967, this was arguing that whenever an individual had to make a substantial to the environment, the likelihood of stress is high. Five thousand peoples medical records were examined, they found that in most cases significant life changes occurred in the months proceeding the onset of illness- these results were used to produce the SRRS. A sample of 394 was taken to rate the degree of their social readjustment. Each event was ranked with a score. The higher the individuals score was the greater risk they came across of illness.

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Limitations of this research include: -

Only measuring life events.

Asking participants to remember events from the previous year would produce unreliable subjective data.

Different situations could be different from person to person because not all-medical reports may be of the same age range.

The scale does not distinguish positive from negative, as the model assumes that any life change is stressful, without any supporting evidence.

As a result of the criticism of the SRRS Kanner et al 1981 produced a ‘Hassles and Uplifts’ scale. Number of researchers argued that daily hassles lead to more stress ...

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