Disorientation in hypertext: the effects of three text structures on navigation performance.

Area of Science:

• Human-Computer Interaction
• Cognitive Psychology
• Educational Technology

Background:

• Hypertext systems offer non-linear information access, potentially impacting user navigation and learning.
• Understanding the cognitive load and efficiency of different hypertext structures is crucial for effective digital learning environments.

Purpose of the Study:

• To compare navigation performance across three hypertext topologies: linear, hierarchical, and non-linear.
• To evaluate the impact of these topologies on information retrieval speed and accuracy.
• To assess user perceptions of performance and usability in different hypertext environments.

Main Methods:

• Participants navigated three versions of a document (linear, hierarchical, non-linear) to answer questions and locate specific nodes.
• Navigation speed and accuracy were quantitatively measured.
• Post-task questionnaires assessed subjective user experience and perceived performance.

Main Results:

• Linear hypertext resulted in significantly better navigation performance (speed and accuracy) compared to non-linear hypertext.
• Hierarchical hypertext performance was intermediate between linear and non-linear structures.
• Subjective evaluations corroborated the objective performance findings, indicating a preference for more structured navigation.

Conclusions:

• Linear and hierarchical hypertext structures facilitate more efficient information navigation than purely non-linear designs.
• Findings have implications for the design of computer-assisted learning systems, suggesting that structured navigation aids user comprehension and efficiency.
• Further research could explore adaptive hypertext systems that adjust topology based on user needs.