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.
Outline how sound stimuli are detected in the ear.
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. 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);
Examiners report
Almost everyone received at least two marks for the outline of Pavlov’s experiment and many received the full three marks.
Most received the full 2 marks for this section on hearing as well.