January 1, 1993
A user test of handwritten input on a pen machine achieved a 1.6% recognition error rate at the character level, corresponding to 8.8% errors on the word level. Input speed was 10 words per minute. In spite of the recognition errors, information retrieval of the handwritten notes was almost as good as retrieval of perfect text.
June 1, 1992
Jakob Nielsen's trip report for the 1992 Computer-Human Interaction conference (CHI '92).
CHI'92 (Monterey, CA, 3-7 May 1992), IEEE Software 9, 4 (July 1992), pp. 78- 79.
January 1, 1992
The concept of direct manipulation is usually viewed as a single characteristic of a class of interaction styles. Here, direct manipulation is analyzed according to a detailed layered interaction model, showing that it has quite different effects on the dialogue on the different levels. In particular, the "no errors" claim may be true at the syntax level but not at several of the levels above or below that level.
Furthermore, a unified framework is presented for conceptualizing Direct Manipulation, What You See Is What You Get (WYSIWYG), Transparency, Immediate Command Specification, Arcticulatory Directness, and Computational Appliances according to a layered interaction view.
June 1, 1990
Jakob Nielsen's trip report from the 1990 Computer-Human Interaction (CHI '90) conference.
CHI'90 (Seattle, WA, 1-5 April 1990), SIGCHI Bulletin 22, 2 (October 1990), pp. 20-25.
May 22, 1990
Trip report from a one-day seminar on usability metrics and methodologies, sponsored by the British Computer Society's human-computer interaction specialist group in connection with its 1990 annual meeting in London.
April 1, 1990
Trip report from the ACM Hypertext'89 conference. Includes summary of Meyrowitz' discussion of open integrating hypertext and the extent to which the Memex vision has been realized so far.
Hypertext'89 (Pittsburgh, PA, 5-8 November 1989), SIGCHI Bulletin 21, 4 (April 1990), pp. 52-61.
July 1, 1989
Jakob Nielsen's trip report for the 1989 Hypertext 2 conference in York, U.K.
International Conference on Fifth Generation Computer Systems (Tokyo, Japan, 28 November - 2 December 1988), SIGCHI Bulletin 21, 1 (July 1989), pp. 68-71.
June 1, 1989
Jakob Nielsen's trip report from the 1989 Computer-Human Interaction (CHI '89) conference held in Austin, Texas.
CHI'89 (Austin, TX, 30 April - 4 May 1989), SIGCHI Bulletin 21, 2 (October 1989), pp. 28-40.
June 1, 1989
Jakob Nielsen's trip report for the 1988 Computer-Human Interaction conference (CHI '88).
CHI'88 (Washington, DC, 15-19 May 1988), SIGCHI Bulletin 20, 2 (October 1988), pp. 58-66.
March 1, 1989
Jakob Nielsen's trip report for the 1989 Hyper Hyper Conference in London, UK.
British Computer Society HyperHyper workshop (London, UK, 23 February 1989), SIGCHI Bulletin 21, 1 (July 1989), pp. 65-67.
December 31, 1988
Jakob Nielsen's trip report for the 1988 International Conference on Fifth Generation Computer systems conference in Tokyo, Japan.
April 1, 1988
Jakob Nielsen's trip report for the 1987 Hypertext conference.
HyperTEXT'87 (Chapel Hill, NC, 13-15 November 1987), SIGCHI Bulletin 19, 4 (April 1988), pp. 27-35. Also exists in a hypertext version in HyperCard format.
December 31, 1987
Jakob Nielsen's Trip Report from the 1987 Joint Computer-Human Interaction + Graphics Interface Conferences (CHI+GI '87)
December 31, 1986
Jakob Nielsen's trip report for the 1986 Computer-supported Cooperative Work conference (CSCW '86).
Computer-Supported Cooperative Work'86 (Austin, TX, 3-5 December 1986), ACM SIGCHI Bulletin 19, 1 (July 1987), pp. 54-61.
July 8, 2013
Users might overlook things that change too fast—and even when they do notice, changeable screen elements are harder to understand in a limited timeframe.
November 3, 2013
Improve the layout of your online forms by placing form labels near the associated text field and by grouping similar fields.
August 31, 2013
The interaction cost is the sum of efforts — mental and physical — that the users must deploy in
interacting with a site in order to reach their goals.
December 22, 2013
The total cognitive load, or amount of mental processing power needed to use your site, affects how easily users find content and complete tasks.
October 23, 2006
A study of the benefits of big monitors fails on two accounts: it didn't test realistic tasks, and it didn't test realistic use. Productivity is a key argument for workplace usability, but you must measure it carefully.
November 26, 2000
A big lie of computer security is that security improves as password complexity increases. In reality, users simply write down difficult passwords, leaving the system vulnerable. Security is better increased by designing for how people actually behave.
January 4, 2012
What is usability? How, when, and where to improve it? Why should you care? Overview answers basic questions + how to run fast user tests.
January 1, 1994
This essay describes a technique for extending a task analysis based on the principle of goal composition. Basically, goal composition starts by considering each primary goal that the user may have when using the system. A list of possible additional features is then generated by combining each of these goals with a set of general meta-goals that extend the primary goals.