As you may have noticed, there are several different tiers that start with '%'. The Chip-commando in exercise 2 added four of them to the original conversation. More standard in the CHAT code are 1) the speaker dependent tiers, and 2) the tiers for different levels of language. Speaker dependent tiers are %act, %exp and %sit for example (brief overview). The %pho- %syn- and %mor-tier contain phonemic transcription, syntactic structure and morfosyntactic structure respectively. If they are present in the CHILDES-file and if they are useful for the exercise the tiers are shown in the output on this site. If you want to, you can hide the tiers by selecting 'No' 'Show X data?' option.
a) Can you find out for which words Jane uses the phonemic string 'phiphi' or 'phi' in jane03.cha?