Recently, a grader transcribed a recording in this way (listen to the audio file below):
In the recording, we can clearly hear an adult voice say “Tom,” “big,” and “bad” before the student does. These are what we call “tells/tolds,” and the scoring convention is to NOT give students credit for correctly reading these words.
In these cases, you would want to follow this direction from the FAQ section of the grader instructions:
“I hear a parent or teacher inserting a word, what should I do? You should ignore what the other voice(s) say and transcribe what the student says. The one exception is a case where the parent/teacher appears to be "giving away" the word, leading the student to say the word correctly. In this case, if the student then says the word correctly, please simply mark the word as unsaid (by crossing out the word and not inserting it).”
This is how we regraded the recording: