Leveraging Your Expertise by Means of Heuristics

Leveraging Your Expertise by Means of Heuristics PowerPoint PPT Presentation


  • 98 Views
  • Uploaded on
  • Presentation posted in: General

What Is a Heuristic?. Heuristics are procedures or principles that help their users work systematically toward a discovery, a decision, or a solution." -- van der Geest and Spyridakis (2000)A heuristic encapsulates knowledge and offers guidance." -- Farkas and Farkas (200

Download Presentation

Leveraging Your Expertise by Means of Heuristics

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


1. Leveraging Your Expertise by Means of Heuristics David K. Farkas TC 510 Fall Quarter 04 Now we switch our focus from cultural dimensions of the web design to the issue of capturing our insights and creating a tool for the design and evaluation of websites. Heuristics are a prevalent means of evaluating websites, interfaces, documentss. DF: Professor at UW JF: Industry background (Microsoft, freelance editing, etc.) and teaching at UW and BCC. Joint project: Principles of Web Design (Longman 2002). Co-authored heuristics at 1999 Summer Workshop.Now we switch our focus from cultural dimensions of the web design to the issue of capturing our insights and creating a tool for the design and evaluation of websites. Heuristics are a prevalent means of evaluating websites, interfaces, documentss. DF: Professor at UW JF: Industry background (Microsoft, freelance editing, etc.) and teaching at UW and BCC. Joint project: Principles of Web Design (Longman 2002). Co-authored heuristics at 1999 Summer Workshop.

2. What Is a Heuristic? “Heuristics are procedures or principles that help their users work systematically toward a discovery, a decision, or a solution.” -- van der Geest and Spyridakis (2000) “A heuristic encapsulates knowledge and offers guidance.” -- Farkas and Farkas (2004) “A heuristic is a guideline or a principle. It is any observation that can be operationalized.” -- Simple working definition for TC 510 We have two very good definitions of heuristics. They are focused on the user of the heuristic. Alternative to usability testing. (Easier, possibly as effective?)We have two very good definitions of heuristics. They are focused on the user of the heuristic. Alternative to usability testing. (Easier, possibly as effective?)

3. Singular vs. Plural The term “heuristic” is often used to refer to individual items. But it is often used to refer to a set of items. In TC 510 a heuristic will be an individual item. Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic? Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic?

4. Variables Among Heuristics—1 General or specific; flat or hierarchical. Carefully orient the user within your website. Make sure each page has a page title and either the name of the website or a logo. Absolute or qualified Avoid horizontal scrolling on the Web. Favor placing a logo at the upper left of each page. Open ended or closed ended Have you placed a logo at the upper left of each page? Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic? Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic?

5. Variables Among Heuristics—2 Formative or summative Did you carefully orient the user on each page? Can it be directly operationalized? Old media die slowly, You can work in an older media with confidence that it will not be very rendered obsolete. Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic? Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic?

6. The “Same” Heuristic May Be Phrased in Multiple Ways Avoid long scrolling Web pages. Be cautious about creating long scrolling Web pages. Web pages should not scroll excessively. Long scrolling pages are generally bad design. Users may only look at the content above the “fold.” Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic? Unfortunately, the term “heuristic” is not standardized. What word do we use for a “collection”? What word do we use for the items that make up the collection? These, we think, are all reasonable options. Our preference is to equate the items that make up the body of a heuristic as guidelines. If you say that a heuristic is composed of “guidelines,” the term “guidelines” must be broadly understood to include checklist questions and principles. In the 2000 summer workshop and afterward, there was significant debate about this. Principle: Clutter makes it difficult for users to find and process information. Guideline: Avoid clutter Also: there are issues regarding the boundaries of the heuristic genre: Is a style guide a heuristic? Are design specifications a heuristic?

7. The Form of TC 510 Heuristics Short title: Length of Links Statement: links should be long enough to make the destination of the link fully clear. Explanation: Designers should resist the temptation to overly shorten link text to fit physical space. They should also be cautious about shortening links to make them more inviting. Users resent links that are vague or—even worse—misleading.

8. Sample Heuristics: Nielsen Jakob Nielsen. “Ten Usability Heuristics” Available at: http://www.useit.com/papers/heuristic/heuristic_list.html Link Just in case you are new to heuristics, we want to show one before going on. This is a “typical” heuristic. We discuss it in detail later. You could call this an “individual guideline” making up a heuristics. You could call this a “heuristic item.” You could call this a “heuristic” within a “set of heuristics.” These are several guidelines from Jakob Nielsen’s original UI heuristic. Very general guidelines—hard to apply. Issue: What are the boundaries of the genre? (Style guides, etc.) DF: I have students assess the interface of a parking meter (US) with principles like these Just in case you are new to heuristics, we want to show one before going on. This is a “typical” heuristic. We discuss it in detail later. You could call this an “individual guideline” making up a heuristics. You could call this a “heuristic item.” You could call this a “heuristic” within a “set of heuristics.” These are several guidelines from Jakob Nielsen’s original UI heuristic. Very general guidelines—hard to apply. Issue: What are the boundaries of the genre? (Style guides, etc.) DF: I have students assess the interface of a parking meter (US) with principles like these

9. Sample Heurstics: NCI Let’s look at each of the characteristics in Menno and Thea’s taxonomy—There is a copy of this in the handout. What is your overall impression of this guideline and the presentation of it? Mention the four headingsLet’s look at each of the characteristics in Menno and Thea’s taxonomy—There is a copy of this in the handout. What is your overall impression of this guideline and the presentation of it? Mention the four headings

10. Sample Heuristics: NCI What do you think about the formulation of this guideline? Open or closed? High level? low level? a very specific heuristic—could have adressed question of whether to have long pages or notWhat do you think about the formulation of this guideline? Open or closed? High level? low level? a very specific heuristic—could have adressed question of whether to have long pages or not

11. Sample Heuristics: NCI What about the formulation of this one? Open/closed? high or low level?What about the formulation of this one? Open/closed? high or low level?

12. NCI Guidelines Let’s look at each of the characteristics in Menno and Thea’s taxonomy—There is a copy of this in the handout. What is your overall impression of this guideline and the presentation of it? Mention the four headingsLet’s look at each of the characteristics in Menno and Thea’s taxonomy—There is a copy of this in the handout. What is your overall impression of this guideline and the presentation of it? Mention the four headings

13. IBM Ease of Use Guidelines content is appropriate for a checklist but they are not phrased as questions. not much depth to the discussion not much novelty—and not very high level a little more specific than Nielsencontent is appropriate for a checklist but they are not phrased as questions. not much depth to the discussion not much novelty—and not very high level a little more specific than Nielsen

14. Sample Heuristics: Oracle Guidelines/Specifications Based on review of other guidelines and cross-team input skip over—just mention the exception.Based on review of other guidelines and cross-team input skip over—just mention the exception.

15. Sample Heuristics:Oracle Guidelines/Specifications Focus on this one. What do you think of the presentation here? What about the validity? (foundation, novelty, room for interpretation, validation research) I can tell you that the designers of the heuristic state that they have tested some of the guidelines in usability lab and that they attend usability testing for various products to see if there is any information that would make them alter the guidelines. Seem to get a lot of attention.Focus on this one. What do you think of the presentation here? What about the validity? (foundation, novelty, room for interpretation, validation research) I can tell you that the designers of the heuristic state that they have tested some of the guidelines in usability lab and that they attend usability testing for various products to see if there is any information that would make them alter the guidelines. Seem to get a lot of attention.

16. Pattern Language Heuristics “Patterns” are elaborate heuristics that consist of distinct sections. They describe a situation and problem and offer a guideline as a solution. Pattern languages and patterns have become prevalent in the world of UI design.

17. A Sample Pattern (Marcus): Paging Controls Context: A list may contain too many items to fit on one page. An example: the results of a search. Problem: Users need a way to browse through a long list of items. Forces: The number of items that can be returned may be limited by system performance. Users need to directly access positions within the list. Solution: Group items into pages. Provide paging controls above and below the list. Rationale: Dividing a list into shorter, manageable pages makes it easier to view and navigate the constraints. Users are given ways to navigate the list easily.

18. The Support for a Heuristic A heuristic should rest on some supporting evidence, especially if it’s a published heuristic. The support may consist of relevant research, expert opinion, practitioner experience, etc. Ideally, heuristics would be anchored in highly relevant empirical research. TC 510 heuristics are provisional and we can be somewhat casual about support. At the same time, we should consider what kinds of support might be developed for our heuristics.

19. References Menno de Jong and Thea van der Geest. 2000. “Characterizing Web Heuristics,” Technical Communication, 47(3), 311-326. van der Geest and Spyridakis (2000)

20. The End

  • Login