The Body's Response to Stress - Biological Psychology AS (7)

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THE STRESSED STUDENT STUDY – KIECOLT GLASER ET AL.

The researchers wanted to know whether the immune system was influenced by external stressors such as examinations. The more T-cells in the blood stream, the more efficient the immune system.

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HOW DID THEY DO IT?

Medical students gave blood at a low stress time (a month before exams) and also at a high stress time (during exams). The blood was tested for T-cell content.

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WHAT DID THEY FIND?

During the exams the blood had lower NK(Natural Killer) cells, meaning that at times of high stress the immune system was less efficient at fighting disease.

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EVALUATION

The research is correlation. The study only says that stress and illness are related in some way.

There may be a sampling bias – different people respond to stress in different ways.

It is a natural experiment, so whilst it is high in ecological validity, there may be extraneous variables influencing the results.

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Comments

Ava

thanks

Pye

brilliant :)

jethro

see you tomorrow

Jacki

cool

Smile!

great

WhatsHisFace

Really useful, thanks :)

LadyLucifer

thanks

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