| 
|
Topic: problems with cognitive overhead of hypertext
topics >
computer science >
hypertext >
electronic news and blogs
Topic:
hypertext rhetoric
Topic:
hypertext links
Topic:
hypertext subsets, webs, and contexts
Topic:
problem of information overload
Topic:
problems with disorientation in hypertext
Summary
Hypertext demands more of the reader than linear text. With a book or an article, a reader normally goes from front to back, reading each paragraph in turn. With hypertext, readers skip about, browsing or reading whatever interests them. With hypertext, you are never done.Blogs provide a linear view ordered by time. People are good at interleaving multiple linear views. (cbb 3/07)
Subtopic: literary contract
Quote: cognitive overhead in Hypertext is the effort needed to juggle several tasks and trails Quote: problems of Hypertext are disorientation and cognitive overhead [»conkJ9_1987]
Subtopic: which links to follow? -- search
Quote: non-linear text looses the literary contract: if the reader starts at the beginning, the text will flow smoothly [»shasD12_1987] Quote: the literary contract minimizes redundancy, keeps a consistent sophistication, and is concise Quote: normal Hypertext systems do not linearize nodes for reading; nor do they help locate succeeding nodes [»shasD_1985]
Subtopic: when are you done?
Quote: Guide documents are like an adventure game where users must search for information [»sandE1_1987] Quote: a knowledge exploration schema may be huge and largely unknown [»shasD_1985] Quote: Hypertext is antiuser because essential facts can be hidden under alternate routes or unbrowsed text [»mendE3_1988] Quote: many Hypertext links make it hard to determine which ones are useful [»maneS6_1987] Quote: with just links, Hypertext users most wander through nodes looking for relevant information Quote: reading a Hypertext requires choosing which links to follow; these metalevel decisions are not needed in linear texts [»conkJ9_1987]
Subtopic: changing structure
Quote: with normal Hypertext systems, no way to know when 'you are done'; and most alleys of exploration are blind [»maneS6_1987]
Subtopic: links require cognitive overhead
Quote: a Storyspace document must be read many times since the structure may change each time [»boltJD11_1987]
Subtopic: blackboards and blogs
Quote: Hypertext links require 'cognitive overhead' to create, name and keep track [»conkJ9_1987] Quote: cognitive overhead since an association requires finding a word or phrase to summarize or suggest it or its relationship [»conkJ9_1987] Quote: cognitive overhead since an association may require multiple links into the document [»conkJ9_1987]
Subtopic: importance of rapid access
Quote: blackboards enforce one person at a time; shared windows bring new demands on participants [»stefM1_1987]
Subtopic: user studies
Quote: cognitive overhead in Hypertext is reduced by rapid access (KMS), short descriptions (Intermedia), and graphical browsers [»conkJ9_1987] Quote: Hypertext access time is important since readers need to look at nodes to determine relevancy [»conkJ9_1987]
Quote: in a study, users who followed Hypertext links made more mistakes, answered fewer questions, and took longer [»graySH2_1989]
Topic: electronic news and blogs (25 items)
Topic: hypertext rhetoric (17 items)
Topic: hypertext links (45 items)
Topic: hypertext subsets, webs, and contexts (12 items)
Topic: problem of information overload (23 items)
Topic: problems with disorientation in hypertext
(18 items)