the child had not touched the box after 3 min or if there was no success after 4 min, the child was told
that he or she had done very well and the experiment ended. If the child was successful, E said, ‘‘Well
done, that’s a sticker for your pile. It’s your turn again. You can do whatever you like.” E took a sticker
from a pile and added it to the child’s pile and put the token back in the Slotbox. The child was allowed
up to five successes. All children were rewarded with six stickers irrespective of success.