2New Testing and Assessment Methods for Shelters and Trainers Sue Sternberg has been developing and refining assessment techniques for decades to help shelter workers and trainers determine the likelihood that a dog will engage in aggressive behaviors. Assessing Aggression Thresholds in Dogs includes Sue's newest protocols based on the theory that sociability is the key predictor of a dog's potential for aggression. In addition to a number of step-by-step tests for shelter workers to use, Sue has included a section for trainers and behaviorists for use in home visitations to better design training and management programs for their clients.