Table 1.

List of objects used in the tasks

 1Beer mug
 2Bowl
 3Calculator
 4Chinese tea cup
 5Coffee mug
 6Coke bottle
 7Compact disc
 8Computer mouse
 9Frying pan
10Iron
11Key
12Pen
13Playing card
14Scissors
15Screw driver
16Skewer
17Stapler
18Tea spoon
19Videotape
20Wrench