E recapped by saying, ‘‘Now, do you remember that Tina used this tool and Sophie used this tool
[E points to appropriate monitors and tools]? Well, now it’s your turn and you can do anything you
like.” The participant was given up to 3 min to interact with the Slotbox. There were a number of
set prompts in place if 60 s had elapsed and the child had (a) not yet touched any part of the apparatus
(‘‘Can you pick up a tool?”), (b) picked up a tool but not made contact with the Slotbox (‘‘Can you play
with the toy?”), or (c) moved the token to the front of the task but not opened door (‘‘You can open the
door”). If 2 min had passed and there was no success, the child was asked, ‘‘Can you get the toy out?”