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Date November 2010 Marks available 2 Reference code 10N.3.SL.TZ0.15
Level Standard level Paper Paper 3 Time zone TZ0
Command term Outline Question number 15 Adapted from N/A

Question

Outline Pavlov’s experiments into the conditioning of dogs.

[3]
a.

Outline how sound stimuli are detected in the ear.

[2]
b.

Markscheme

a. classical conditioning;

b. Pavlov sounded a bell before food / conditioned stimulus;

c. dogs salivated when they heard the bell / conditioned response;

d. the amount of salivation after the bell was as great as when the food alone was presented;

e. dogs had learnt to associate the two external stimuli;

a.

a. sound waves reaching eardrum cause it to vibrate;

b. vibrations passed to bones of middle ear/oval window/fluid in cochlea;

c. detected by mechanoreceptors/hair cells (in cochlea of ear);

b.

Examiners report

Almost everyone received at least two marks for the outline of Pavlov’s experiment and many received the full three marks.

a.

Most received the full 2 marks for this section on hearing as well.

b.

Syllabus sections

Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Core topics) » A.3 Perception of stimuli
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