For example, a return hyperlink should move back to Chapter 2 from Chapter 3, regardless how and from where the viewer arrived at Chapter 3. Navigation Quality concerns usability issues of navigational guide. It looks at whether a Web site provides consistent location, presentation, and usage of navigational guide. An inconsistent navigation example would be that the hyperlink leading back to the home page of a Web site is displayed at the top of some Web pages. However, in other pages, the hyperlink could appear at the bottom of the pages.
Consistency is a key to help visitors establish patterns of recognition.
Thus, mental effort that is required to comprehend the contents of Web pages would be reduced. It judges the representation of various navigational guides. For example, it would judge whether an image used to indicate the home page in Web pages matches well with the meaning of the hyperlink. Another bad example is that a hyperlink text is shown in the same color as non-hyperlink texts, or a normal text is displayed in a color that is commonly regarded as a hyperlink. 2.3 Orientation Orientation is defined as information indicating where visitors are, how they got there or where they should go next.