Outline two characteristics of obsessive-compulsive disorder. Refer to Nadia in your answer.

Nadia's Case Study

Nadia describes her daily experience:

"I am constantly plagued by the horrific thought that lethal bacteria are coating every surface in our kitchen and will poison my children. To stop this, I have to wipe down every single handle and countertop in a clockwise motion exactly three times using a fresh disinfectant wipe for each surface. If I get distracted or miss a spot, I feel an intense wave of panic and have to throw the wipes away and restart the entire process from the beginning."