Final answer:
Helen's ability to find an alternative route because of the closure of her usual path to college can be explained by the cognitive map theory proposed by psychologist Edward Tolman, suggesting she had a mental representation of the area.
Step-by-step explanation:
Psychologist Edward Tolman would explain Helen's behavior of taking a different route to the campus when encountering a closure on Sheridan Avenue as her having formed a cognitive map of the area. This concept, developed by Tolman through experiments with rats in mazes, illustrates that learning can take place without reinforcement and that a mental representation of one's environment is created. Such a map enables individuals to navigate and find alternative routes when faced with obstacles, as Helen did when Sheridan Avenue was flooded and closed at 23rd Street.