In 1982, the late, great NZ reading researcher Marie Clay identified a group of children having difficulty learning to read as "tangled tots (with) reading knots". She was referring to children who, despite having no condition that potentially affected their ability to learn, didn't seem to benefit from reading instruction. She hypothesised that such children "had tangled the teaching in a web of distorted learning which blocked school progress".
History
Citation
Cambourne, B. (2014). The seven messages of highly effective reading teachers. The Conversation, 1 May 1-3.