Humera Iqbal enters the remarkable world of Children of Deaf Adults, or CODAs. At a young age they take on the mighty responsibility of interpreting for their mums and dads outside the home…in a world built for the hearing. That means they are often emotionally switched on, assiduously punctual, confident and super-organised. Humera, associate professor of psychology at University College London, meets CODA children as they chat and translate while their parents are out and about getting things done.