difference or disorder?
We are all different. Some of those differences make it harder to exist in the world. Some find busy crowds and loud noises intolerable, whilst others thrive when surrounded with people and immersed in action. Some learn to read very young and apparently without effort, for others it takes years and a more intentional approach.
The conventional way of seeing these differences is as disorders, particularly if they affect how a child performs in the education system.
