Interviewer instructions
    
                                    1 stands for "correct response" and signifies that the child demonstrated the skill being assessed.
0 stands for "incorect response". That is 0 means the child does not have or did not demonstrate the skill being assessed.
999 stands for "refused to respond". Refused answer is only to be used when a child literally refused to respond to a question. 
When the child cannot think of more items, move on to the next question.