Lindsey is often late for soccer practice because she has to tie and untie the laces on her soccer shoes exactly four times before she can play. What disorder is Lindsey displaying?

Lindsey is displaying symptoms of obsessive compulsive disorder (OCD). OCD often involves repetitive behaviors or mental acts that an individual feels driven to perform in response to an obsession, such as a fear of not being prepared, which in this case manifests as the need to tie and untie her shoelaces multiple times.