OCR B6 brain and mind part 3

HideShow resource information
  • Created by: Edd
  • Created on: 10-06-12 14:53

A reflex is an automatic response to a stimulus. Humans use reflex actions in only some of their behaviour, for example controlling the eye's pupil size.

Conditioned reflexes.

A reflex response to a new stimulus can be learned.

A Russian scientist called Pavlov trained dogs to expect food whenever he rang a bell. The dogs eventually produced saliva when they heard the bell ring.

  1. The dog salivates naturally when given food
  2. Pavlov rings a bell every time the dog eats
  3. After much repetition the dog salivates when the bell rings, even when there is no food.

This is an example of a conditioned reflex. The dogs were conditioned to salivate when the bell rang.

  • The food is called a primary stimulus.
  • The ringing bell is called a secondary stimulus.

Another example of conditioning is a goldfish expecting food when seeing a…




brill thanks!

Similar Biology resources:

See all Biology resources »See all Cells, tissues and organs resources »