This is a test of auditory discrimination. The scenario is that two children are learning some new words. The computer shows a picture of an object and says its name. Then the two characters will try to say the word, one after the other. The student has to listen very carefully and decide which of the characters says the word properly (correctly). The student tells the computer which one said the word correctly by selecting that character (see Figure 27).
Care must be taken to ensure that the student listens very carefully to the spoken words. This process can easily be disrupted by excessive or sudden noise, so care must be taken to minimise this type of influence. The practice level provides the student the opportunity to become familiar with the task before the test begins.
Figure 27. The duck–buck discrimination item