Water is extremely important and essential to our health. In this experiment, an ABAB design will be used to determine the effects of positive reinforcement on daily water consumption. This treatment is expected to increase daily water intake when combined with positive reinforcement. Positive reinforcement occurs when a behavior is immediately followed by a stimulus that increases the future frequency of the behavior under similar conditions. Data for this experiment were recorded daily over a 4-week period, following the rules for a reverse ABAB design. The materials used in this experiment included an Apple iPhone to record the gold stars received each day, 8-ounce Dixie plastic cups, and 16-ounce Polonia Spring water bottles. The participant was an 18-year-old male college student. The second week of the procedure began treatment. An average daily goal was set at 80 ounces per day. The third week of the procedure repeated the basic treatment from the first week. Data was recorded for that same week without any reinforcement. The fourth and final week repeated week 2 of the positive reinforcement treatment. Gold stars were awarded accordingly if the participant achieved his or her daily goal of 80 ounces per day. Keywords: ABAB design, positive reinforcement, basic treatmentPositive reinforcement and reversal The effects of ABAB design increase daily water consumption in a healthy male The human body is estimated to be about 60 years old. 70% water. The blood, as well as the muscles, lungs and brain all contain a high percentage of water. Water is extremely important and essential for our health (Kaushik, Mullee, Bryant, Hill, 2007). Dehydration is one of the most common side effects of not consuming enough in their behavior. The results of this experiment directly support the hypothesis. However, not only do the results support the hypothesis, but they also show a dramatic improvement in water consumption when paired with the positive reinforcement of nearly 77 ounces per day. This equates to about an average of 5 more 16-ounce bottles of Polonia Spring per day. Some limitations were discovered during the study. For future reference, increasing the population size may produce different results since the experiment was performed on a single participant. The age of the participants is also directly related to the type of reinforcement provided. For example, even if the experiment was successful, gold stars may be a more suitable reinforcer for children between the ages of 5 and 12. For a 21 year old young male, you may want to find a more suitable reinforcer.