Question pretext
I will show you a series of pictures. Each picture has figures in three rows and three columns. One figure is missing. You should find the missing part required to complete a pattern. You will be given 5 minutes. During that time, do as many as possible. Feel free to skip a picture and come back later..
Interviewer instructions
1) Show the pictures
2) The respondent needs 5 minutes of uninterrupted time. If they do get interrupted, take the pictures back and return it to them for the remaining time. For every correct set of answers you give the respondent 10/= only i.e. if they get all the 12 correct, you give 120/=