Although nonlinear hypertext can offer students many benefits, Rouet and Levonen (1996) advise that without overt instruction in how to navigate hypertext effectively, students may become lost in a sea of information, potentially experiencing cognitive overload. Gillingham (1996) suggests that attention to text, task, and context is necessary for effective comprehension of hypertext. Foltz (1996) cautions that hypertext may present a problem for students with poor reading skills because it causes an additional processing load by making the reader responsible for navigating the text. Having to choose where to go next can take students' attention away from processing the text, with the possible result that they generate fewer hypotheses as they read, making it harder for them to integrate the information presented. Foltz' work pointed to two key factors in hypertext comprehension: (1) the coherence of the text and (2) how the reader's goals affected strategies used. Each of these researchers points to the need for extended research to elucidate the role of hypertext in building reading skills.