Ryan McLaughlin, WSU (IMAGE) Washington State University Caption The WSU research team found that rats with regular access to cannabis seek more of the substance and tend to show increased drug-seeking behavior when cannabis is absent. Credit WSU Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.