Article by Richard Hartshorne and Richard E. Ferdig, appears in the Volume 5, 2006 edition of Electronic Journal for the Integration of Technology in Education:
There are numerous benefits associated with integrating hypermedia applications into teaching and learning environments. However, simply adding a hypertextual component does not ensure increased success in teaching or learning. Various issues can transform hypermedia into a constraint rather than an enabler of learning.
Source: Via Online Learning Update