Dr James Reynolds is a post-doctoral researcher at the University of Sheffield currently investigating health behaviour goals (e.g. exercise, healthy eating) and why people fail to achieve their goals. He completed his PhD at Sheffield Hallam University investigating the long term effects of cannabis use on executive function with a specific focus on the age at which one starts using cannabis. He is interested in substance use, addiction, and other public health problems. Future research interests include investigating the risk factors for using certain substances (e.g., cannabis), trying to understand how to reduce the harms associated with substance use, and exploring what effects substance use has on educational and work performance. Outside of research he spends a lot of time with public engagement including giving talks in schools regarding drug use, giving public lectures on cannabis, and he recently was a national finalist in the Vitae ®3MT competition in which he presented his entire thesis in a 3 minute presentation.