Problem behaviors are a common reason owners cite for surrendering dogs to shelters. Moreover, the shelter environment is stressful and it may exacerbate or even induce problematic behaviors in sheltered dogs. An accurate and reliable understanding of behavioral tendencies and personality is important in determining a dog's suitability for rehoming, need for behavioral treatment and intervention while in the shelter, and best placement when rehomed. This is why the Center for Shelter Dogs chose to focus much of our research on shelter dog behavioral assessments. In particular, we worked to validate the Match-Up II Behavior Evaluation, part of the Match-Up II Shelter Dog Rehoming Program, through an investigation of its ability to identify common canine personality traits, the reliability of its behavioral coding (consistency of measurement over time, place, and evaluator), and the predictive validity of its results (the accuracy in predicting behavior in the home). In addition, we also conducted other research related to behavior evaluations, such as the use of a fake dog during a behavior evaluation instead of a live dog.