Why do some children start gambling at a young age while others do not? Theorists have suggested that the answer to this question is some combination of individual traits and environmental factors, both nature and nurture, but it is not yet understood which traits and factors have more of an influence on behavior. To address this question, researchers must examine the same children over a length of time (in what is called a longitudinal study) in order to see what traits in a younger child predict gambling behavior as the child ages. A recent study of Canadian children published in the journal Psychology of Addictive Behaviors took just this approach (Vitaro & Wanner, 2011). The researchers gathered information about 1,125 children and their families between the ages of six and eight, and then measured their gambling behavior at the age of 10. The findings suggest that preventing gambling in children will require a multifaceted approach that addresses all of the potential risk factors involved.