麻豆约拍

Hoarding is now defined as a mental disorder - how does the condition develop? We hear from Randy Frost, Professor of Psychology at Smith College, Northampton, Massachusetts. He's been studying hoarders and hoarding for 25 years. Stephen is a hoarder and lives in the north of England, and explains how his hoarding has developed.

Photo: Objects piled in a garage Credit: Thinkstock