sentences:  The dogs often have behavioral problems, including excessive barking or aggression.For her doctoral dissertation, Sandra Merriam-Aduini studied the effects of Project POOCH had on violent, incarcerated male juveniles inmates, studying effects on recidivism, reformation, and behavioral changes linked to human-animal interactions emphasizing responsibility, patience, and compassion.Between 1993 and 1999, Dr. Merriam-Aduini found zero recidivism of POOCH participants and that the program achieved educational expectations and judicial orders with success rates, including marked behavior improvements in "respect for authority, social interaction and leadership" as well as "growth in areas of honesty, empathy, nurturing, social growth, understanding, confidence level and pride of accomplishment".