Imagine you're a researcher studying how sleep affects mood. To explore the connection, you would look at two key "variables": sleep (how much someone gets) and mood (how happy or irritable they feel) ...

Objective Fear, anxiety, depression, distress and catastrophisation are all factors known to affect pain and disability levels. To date, the association of such psychological factors has yet to be ...

Suppose you are about to meet a person for the first time and want to predict that person’s thoughts, feelings, and behaviors in a variety of settings over the next several years. What single piece of ...