Skylar has conducted research on the effects of caffeine and ginseng on a decision making and planning abilities in young adults. The participants were administered caffeine, ginseng, or 200mg of each and administered the Tower of Hanoi. The Tower of Hanoi is a decision making task in which rings must be moved across three pegs in order in build a tower. Participants that were administrated only caffeine showed a significantly higher scaled achievement scores compared to the groups that received only ginseng or a combination of caffeine and ginseng. From these results, it was determined that the combination of caffeine and ginseng do not appear to have a positive impact on planning and decision-making in young adults.