Your SlideShare is downloading. ×
0
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Usability Evaluation on structural navigation and link terms
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Usability Evaluation on structural navigation and link terms

1,493

Published on

Usability Evaluation on structural navigation and link terms …

Usability Evaluation on structural navigation and link terms
of an interactive web application in eBay E-commerce site

Published in: Economy & Finance, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
1,493
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
61
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Usability Evaluation on structural navigation and link terms of an interactive web application in eBay E-commerce site Prof.Francesca Rizzo, Mohammand Jannatul Ferdous, Pintu Chandra Shill, Mohammad Iqbal Mohummud, Lin Liran Politecnico di Milano Via Castelnuovo, 7, CO-22100, Como, Italy rizzo@elect.polimi.it, {ferdous_cs,lpintucskuet,iqbalmahmood2002}@yahoo.com, ullillr@hotmail.com 1. INTRODUCTION ABSTRACT The Web application is a navigational system. The Usability is a quality attribute that assesses how easily basic user interaction is to click on hypertext links in user interfaces are to be use which is defined by five order to move around a huge information space with quality components, learnability, efficiency, hundreds of millions of pages. Because the space is so memorability, errors and satisfaction. Structural vast, navigation is difficult, and it becomes necessary to navigation and link terms are the great important role in provide users with navigational support beyond the design of graphical user interface of an interactive simple quot;go-toquot; hyperlinks [1]. application. The eBay site is the ideal example of the best seller eCommerce site world wide. We therefore decided to conduct a Heuristic Evaluation by Jacob Nielsen guideline to find the usability problem of the current site and provide user a new graphical user interface to browse the eBay site with more satisfaction, efficiency and efficient way. This paper presents the usability testing of an interactive application eBay E-commerce site in order to increase the user satisfaction, efficient and efficiency. We identified some problems by conducting Heuristic Evaluation and made hypothesis according to the problems. Then we made a prototype to take the end-user test, in terms of complexity. The results of the experiment represents that our implemented prototype shown less complexity rather than original eBay site in order to performed specific tasks. Moreover, users feel more satisfaction using our implemented prototype rather than using the original eBay site. General terms Figure 1: Tree structure navigation of sample site Design, Structural Navigation, Heuristic Evaluation, Structural links are links that systematically point to Link terms, Experimentation, Hypothesis. other levels of the site structure as well as to siblings or children in a hierarchy. It is important to have the same Keywords structural links on all pages so that the user will World Wide Web, Usability, Experimental Evaluation, understand what structural navigation options to expect E-Commerce, Electronic Data Interchange. [1]. 1
  • 2. The structural navigation bar is becoming a ubiquitous element on many websites. This experiment tests whether this type of navigational reference is truly valuable. E-Commerce (electronic commerce) is the buying and selling of goods and services on the Internet, especially in the World Wide Web. In practice, this term and a newer term, E-Business, are often used interchangeably. Electronics Commerce can be between two business transmitting funds, goods, services or data or between a business and a customer. It is also true to say, however, that eCommerce also includes all inter-company and intra-company functions (such as sales, marketing, accounts, logistics, manufacturing, and negotiation) that enable commerce Figure 2: Screen shot of eBay eCommerce Site and use electronic mail, EDI (Electronic Data The eBay specialty sites offer you an almost endless Interchange), file transfer, digital fax, video choice of items to purchase and many different ways to conferencing, workflow, or interaction with a remote shop bid and buy. It contains Express, eBay Stores, computer. E-Commerce also includes buying and eBay Motors, eBay Business, Help.com, Apartments on selling over the World-Wide Web and the Internet, rent.com, StubHub tickets in the left panel menu box electronic funds transfer, smart cards, digital cash, and with heading specialty sites. With The eBay Express all other methods of completing business transactions it's faster and easier than ever to breeze through all over digital networks. Our experimental site eBay is the shopping. You can find the best deals on everything ideal example of an eCommerce site. from designer jeans to a complete home theater system by few mouse clicks. Everything is in eBay Express The paper is organized as follows: in Section 2 which is offered at a cheapest price ordered by top summarizes the functionality. Section 3 describes the eBay sellers. You can get what you want now without rationale and the motivation of our experiment. Section bidding and waiting. You can go to eBay Stores to visit 4 describe and discuss the experimental methodology, the online storefronts of experienced, high-volume conditions, equipment and result obtained from the eBay sellers who provide additional shopping experiments. Finally, Section 5 & 6 reports research convenience. All important navigation links are present problem and introduces the future works. in the home page especially in the top menu and left panel. 2. FUNCTIONALITY We describe about eBay website which is the large The eBay Motors is a special area of eBay that makes it online trading company. EBay is the world’s online easy to buy and sell vehicles and parts of all types: cars, marketing place which place for buyers and seller to trucks, SUVs, vans, motorcycles, boats, airplanes, and come together and trade almost anything. Its original related accessories by navigating categories. User can American website, Now its established in several buy books, CDs, video games, and much more at set countries Australia, Austria, Belgium, Canada, China, prices. Sellers set prices ahead of time, so you know France, Germany, Hong Kong, India, Ireland, Italy, exactly what you'll pay before you buy. Netherlands, New Zealand, Poland, Philippines, Singapore, South Korea, Spain, Sweden, Switzerland, Half.com sellers are individuals and small businesses Taiwan and United Kingdom. who sell directly to you, keeping prices low.Rent.com is the only transaction-based Internet listing website in There are some groups of link in the main page of eBay the apartment and rental housing industry. Its unique website such that specialty sites, categories, more eBay business model has made it the number one third-party sites, global site etc. producer of verified lease transactions in the nation 2
  • 3. online and offline. The Rent.com service is available to following figure is showing the complete conceptual renters and property owners and managers in most eBay architecture. American cities, including the nation's top fifty metropolitan markets. So, eBay Motors, Half.com and Rent.com all special sites are inside the left panel group box and only eBay Motors, Express, Stores are in the Top menu with the catagories . Body contains the advertisements in the home page and list of items in the others pages. The following figures is showing the basic structural layout of eBay site. Figure 4: Architectural view of eBay 3. THE RATIONALE AND MOTIVATION Our aim was to do usability evaluation on an interactive application. We have choosen the web application as interative application because web is changing our life style and make faster everyday. E-commerce is one of the most important factor in respect to change our life style. E-commerce is continued to be a driving force behind future economic growth worldwide, and important for developing countries. It plays an important role in economic growth for developing countries. It helps countries improve trade efficiency and facilitates the integration of developing countries Figure 3: General site layout of eBay into the global economy. Electronic commerce only provides all information to the users using E-commerce The main eBay site and most of the special eBay site website. layout are left align like above figure. Only few special sites (i.e. eBay Motors & Express) are centered align. User interaction with the website depends on the flexible, efficient satisfaction use of the website. These The eBay site is developed in distributed architecture. It usability dimensions depend on the Structural has several web servers with distributed database. For navigation, link consistency, link terms make sense and example, www.ebay.it is for the Italian user and image have alternate text. So, we motivated to work www.ebay.com for the American and global user but with link terms and mainly structural navigation of the all sites are using the same database schema from the eBay site application which would be the best for the distributed database. There are lot of database are eBay designer, manager to make their applications placed around the world but all are synchronized with more usable for the end-user. each other. User first hit the site by putting the site address in the address bar of explorer and connects to the nearest web server. Web server connects to the distributed database to retrieve the list of possible items or others things such as Italian web server will connect to the Italian DB server or nearest DB server. Here the 3
  • 4. 4. EBAY USABILITY EVOLUATION Principle Violation Ranking THROUGH A CONTROLLED little bit 1 EXPERIMENTATION Little-bit more 2 Average 3 4.1 Experiment More than Average 4 We have ranked the violation level which violates the Extreme 5 usability principles. The table 1 shows the violation ranking. Then we found six problems which violets rule Table 1: Principle violation ranking of Jacob Nielsen principles. The table 2 shows the six problem including violation level, principal & suggestions. Problem Level Principle Suggestion P1: In the buying pages, there is no back navigation Flexibility and There should be back 3 link when the users want to buy any product. Efficiency of navigation link in the buying use. page. P2: Top structural navigation contains only some Consistency Top structural navigation 2 links of left structural navigation. Few of them are and Standards should be consistent with the simple items links of specific domain. i.e. “eBay left structural navigation. Motors” is the item link of Special Site Domain of left panel. P3: Left structural navigation, special sites domain Flexibility and All special sites should be 3 contains different structural design of each Efficiency of consistent. navigation link. For example “eBay Express” is use centered layout but other sites are not. Cell Phones & PDAs > Bluetooth Wireless P4: There is no difference between Handsets- Visibility of 4 Accessories > Headsets - Wireless > Wireless and Motorola in the following link though System Status Motorola user is visiting Motorola products. Motorola link should be little bit highlighted so that user can Cell Phones & PDAs > Bluetooth Wireless Accessories > Headsets - understand that they are Wireless > Motorola visiting Motorola products. P5: Each item page of categories does not maintain Consistency Follow the standard of the 4 the left panel layout. and standards three panel layout. Cameras & Photo > Bags, Cases & Straps > For Cameras > Pro, Aluminum, Hard Cases P6: The meaning of eBay Motors makes the users Visibility of Change the name or make 3 confused, since actually it is used to only sell second System Status some meaningful text hand cars. explanation. Table 2: Problems of the experiment 4
  • 5. Figure 5: Difference of current site and prototype (P2 & P6) 4.1.1 The Hypothesis Problem Null Hypothesis Alternative Hypothesis P1: In the buying pages, there is There is no problem to back There is no way to back home with no back navigation link when the home page from the each item respect to the original eBay site from users want to buy any product. category of any module for the the each item category of any module user. for the user. Our implemented prototype improves the user performance. We expect the better performance of the implemented prototype with respect to the original eBay site. P2: Top structural navigation Users easily recognize that it is Users can not recognize that it is the contains only some links of left the most important navigation most important navigation domain of structural navigation. Few of domain of the left structure and the left structure with respect to the them are simple items links of there is no significant original eBay site and there is a specific domain. i.e. “eBay difference between original significant difference between original Motors” is the item link of eBay sites and our eBay site and our implemented Special Site Domain of left panel. implemented prototype. prototype. 5
  • 6. P3: Left structural navigation, There is no problem for the It is not feasible & efficient for the special sites domain contains user to access different user to access different structural different structural design of each structural layout of different layout of different domain of special navigation link. For example domain of special sites. sites and there is a significant “eBay Express” is centered layout difference between original eBay site but other sites are not. and our implemented prototype. P4: There is no difference There is no problem to Users can not understand easily status between Handsets-Wireless and understand the status of the of the Motorola product page to see Motorola in the following link Motorola product page by the the content. We accept the better though user is visiting Motorola user. performance of our implemented products. prototype with respect to the original Cell Phones & PDAs > Bluetooth Wireless eBay stie. Accessories > Headsets - Wireless > Motorola P5: Each item page of categories User do not need left panel to Users can not access if they want to does not maintain the left panel access for the others link. navigate from left panel of each item layout. and there is a significant difference Cameras & Photo > Bags, Cases & Straps > between original eBay site and our For Cameras > Pro, Aluminum, Hard Cases implemented prototype. P6: The meaning of eBay Motors Users can easily identify that Users can not identify that the eBay makes the users confused, since the eBay motor sells only the motors sell only the second hand cars actually it is used to only sell second hand cars. by the eBay Motors navigation. second hand cars. Table 3: Null and alternative hypothesis of problems Figure 6: Difference of current site and prototype (P4 & P5) 6
  • 7. subjects were recruited and allotted in to two different 4.1.2 Factor and Block groups. Each group contained 12 users, 6 users were from computer Engineering and 6 users were from 4.1.2.1 Experimental Factor Management engineering. The two experimental In our project, Graphical representation (i.e. efficient groups did not differ in relation to the expertise on the design of Graphical user interface) can influence the task domain, they had to perform and their expertise user performance. For this reason Graphical user on the use of Web browsers. interface (GUI) is the independent variable of our project and user performance is the dependent In our experiment we assigned same subjects in all variable of our project. experimental condition. 4.1.2.2 Blocks 4.1.4 Experimental Condition Subject/Education Masters Group Experimental Condition Computer Engineering CM group CM group Condition 1: Subjects use original eBay site. Management Engineering MM Group MM Group Condition 2: Subjects use original eBay site. CM group Condition 3: Subjects use 4.1.3 Subjects our implemented prototype. Subjects were selected among the Masters students of MM group Condition 4: Subjects use the computer Engineering and Management our implemented prototype. Engineering at politecnico di Milano, Italy. 12 Figure 7: Difference of current site and prototype (P3) 7
  • 8. 3. Do you feel any problem to access information from 4.1.5 Materials different structural layout according to experimental One prototype was implemented for the six problems application (i.e. In the current application “eBay in order to get the user test. Express” and “eBay Motors” special sites different structural layout but our implemented prototype is 4.1.6 Testing Method same layout for different sites.)? We recruited a convenience sample of 12 test participants made up of students at the politecnico di A. Very difficult B. difficult C. little difficult Milano. Twelve participants were female and two D. no difficult E. N/A were male. All had access to the Internet at university 4. Can you easily identify the Motorola product items for study purpose, buying and work. page to see the link: Cell Phones & PDAs > Bluetooth The participants were asked to perform a set of Wireless Accessories > Headsets - Wireless > Motorola questions at the eBay Web site: www.eBay.com . with respect to the link Cell Phones & PDAs > Bluetooth Wireless Accessories > Headsets - Wireless > Motorola In order to verify the significant differences in performance to perform some specific tasks using our A. Very difficult B. difficult C. little difficult implemented prototype and the original eBay site. The D. no difficult E. N/A CM group was asked to use the original eBay site and 5. Do you feel any difficulties to access if you want to MM group was asked to use the original eBay site. navigate from left panel of each item? CM group was asked to use our implemented prototype and MM group was asked to use our A. Very difficult B. difficult C. little difficult implemented prototype. D. no difficult E. N/A 6. Can you understand easily that eBay motor only sell the second hand car by the respective link text? A. Very difficult B. difficult C. little difficult D. no difficult E. N/A We uploaded our survey questionnaires in online http://www.surveymonkey.com site to take the user test result. Figure 8: Structure of operative stages of the experiment Questionnaires: Read the following statement carefully. What do you feel about that statement? Give your answer according to your thinking just testing each of them separately: 1. Do you feel any difficulties to back from buying page when you want buy any product items? A. Very difficult B. difficult C. little difficult D. no difficult E. N/A 2. Top menu contains special sites links. Do you feel any problem to navigate other special site from the top menu which is available in the left panel? A. Very difficult B. difficult C. little difficult Figure 9: Screen shot of online survey questionnaire D. no difficult E. N/A 8
  • 9. We have taken the answer value according to the 4.1.8 Preparation following table to analyze result. Our subjects are the 12 students of Politecnico di Milano in the department of Computer Engineering Users Answer Complexity and Engineering Management. We prepared our Very difficult 5(A) participants to give the experimental product i.e eBay Difficult 4(B) websites and its wed address is www.eBay.com. At first our participants browse this eBay website if they Little difficult 3(C) are not familiar to this website. We gave our No difficult 2(D) implemented prototype and original eBay website and N/A 1(E) collect data from the participants using online questionnaires. Table 4: Users Answer Complexity 4.1.9 The Results We have sent the online questionnaires link Our experimental hypothesis was verified using the (http://www.surveymonkey.com/s.aspx?sm=0TVgq collected data from the four groups. n1Y5RFADvBV5tr_2fgA_3d_3d) to 12 users by email and collect response from the summery section. User/Problem P1 P2 P3 P4 P5 P6 We also collect it for the individual user result in the Anup Singh A CDBDA table. Shah Reza C CCDDA Sun jin B BCDCA Jinagi taw A BBCCA Fuyin liang C CCCDA Liang B ABCDA Total 24 22 19 17 14 30 Complexity Average 4 3.7 3.1 2.8 2.3 5 Complexity Table 5: User test complexity Result of the Original eBay site (MM Group) User/Problem P1 P2 P3 P4 P5 P6 Anup Singh DDDADD Shah Reza DDDADD Sun jin DDDBDD Jinagi taw CDCBDD Figure 10: Screen shot of survey response summery Fuyin liang DDDACD Liang DDCDDD 4.1.7 The Procedure Total 13 12 14 25 13 12 The experiment was performed on the manipulation Complexity of the independent variable (Design criteria i.e. Average 2.2 2 2.3 4.2 2.2 2 Graphical user interface) and on the measurement of Complexity the dependent variable values (user satisfaction). We Table 6: User test complexity Result of the Our assigned our implemented prototype and original Proposed Prototype (MM group) eBay site to each participant and ask to perform a some specific task and participant performance is evaluated using some questionnaires. 9
  • 10. User/Problem P1 P2 P3 P4 P5 P6 Difference of average difficulties between original and prototype eBay Yucing ACDDDA 5 4.5 Nazrul B CDE DA Original 4 Prototype Anna AB E C BA 3.5 Difficulty 3 Balajit ABDC C B 2.5 Mohammad ABBB CA 2 1.5 Sumon B BDDCD 1 Total 28 22 13 15 17 26 0.5 0 Complexity Prob-1 Prob-2 Prob-3 Prob-4 Prob-5 Prob-6 Average 4.7 3.7 2.2 2.5 2.8 4.3 Problem Complexity Figure 11: Graphical chart of average complexity Table 7: User test complexity Result of the Original eBay site (CM group) Statistical Analysis: Problem 1: User/Problem P1 P2 P3 P4 P5 P6 In MM group tcalc(4.5675) > ttab(2.22814). The mean of Group One minus Group Two equals 1.83. Yucing DDDAD B 95% confidence interval of this difference: From 0.94 Nazrul CCDED B to 2.73. For this reason we reject the NULL Anna DDDDC D hypothesis and accept the alternative hypothesis. Balajit DCEDD D In CM group, tcalc(9.3026) > ttab(2.22814). The Mohammad DDDDD D mean of Group One minus Group Two equals 2.50 Sumon DBDDC D 95% confidence interval of this difference: From Total 13 16 11 14 14 16 1.90 to 3.10. For this reason we accept the Complexity experimental hypothesis and reject the NULL Average 2.2 2.7 1.8 2.3 2.3 2.7 hypothesis. Complexity In the problem1 we actually accept the experimental Table 8: User test complexity Result of the our implemented prototype (CM group) hypothesis for CM and MM group and there is a significant difference between original eBay site and our implemented prototype. From the users point of Result Analysis view and our hypothesis test that our implemented We have analyzed the user test data by using prototype is superior to the original eBay site. statistical test (t-test). In t-test, our calculated result is tcalc and tabulated result is ttab and we compared the And then we combine the user test of CM group and tcalc and ttab in order to decide acceptance and reject MM group and test the statistical hypothesis. In the the NULL hypothesis. combination of CM and MM group the tcalc(8.6232) > ttab(2.81876). The mean of Group One minus Numerical Analysis: Group Two equals 2.17. 95% confidence interval of Fig.11 shows the average complexity when subjects this difference: From 1.65 to 2.69. for this reason this browse the original eBay site and our implemented difference is considered to be extremely statistically prototype with respect to the specific problem. For significant. example, In problem1 original eBay site browsing complexity is 4.4 and our implemented prototype From our statistical Analysis we finalize that we complexity is 2.2 which shows that our implemented accept the experimental hypothesis and reject the null prototype given better performance rather than the hypothesis that our implemented prototype shown the original eBay site. better performance rather than the original eBay site. 10
  • 11. ttab(1.321237). The mean of Group One minus Group Problem 2: In MM group tcalc(5.0000) > ttab(3.16927). The Two equals 0.58. 95% confidence interval of this mean of Group One minus Group Two equals 1.67. difference: From -0.08 to 1.25. For this reason there is 95% confidence interval of this difference: From 0.92 significant difference between the original eBay site to 2.41. For this reason we reject the NULL and our implemented prototype. hypothesis and accept the alternative hypothesis. Finally, statistical analysis and complexity analysis In CM group, tcalc(2.5355) > ttab(2.22814) The mean we shown that our implemented prototype is little bit of Group One minus Group Two equals 1.00. 95% better than the original eBay site. confidence interval of this difference: From 0.12 to 1.88. For this reason we accept the experimental Problem 4: hypothesis and reject the NULL hypothesis that there In MM group tcalc(2.3489) > ttab(1.812461). The is a significant difference between the original eBay mean of Group One minus Group Two equals -1.33 site and our implemented prototype. 95% confidence interval of this difference: From - 2.60 to -0.07 For this reason we reject the NULL For problem2, we combine the user test of CM group hypothesis and accept the alternative hypothesis. and MM group and test the statistical hypothesis. In the combination of CM and MM group the tcalc In CM group tcalc(0.2370) > ttab(0.130185). The (5.0143) > ttab(3.16927). The mean of Group One mean of Group One minus Group Two equals minus Group Two equals 1.33. 95% confidence 0.17. 95% confidence interval of this difference: interval of this difference: From 0.78 to 1.88 and the From -1.40 to 1.73. For this reason we reject the null standard error of difference = 0.266 with df = 22. For hypothesis and accept the alternative hypothesis. this reason there is significant difference between the original eBay site and our implemented prototype. We combined the user test of CM group and MM group and test the statistical hypothesis. In the Finally for problem2 we accept the experimental combination of CM and MM group the tcalc(1.1342) hypothesis and reject the NULL hypothesis that our > ttab(0.685805). The mean of Group One minus implemented prototype shown the better performance Group Two equals -0.58. 95% confidence interval of rather than the original eBay site. this difference: From -1.65 to 0.48 for this reason this difference is considered to be extremely statistically Problem 3: significant. In MM group tcalc(2.2361) > ttab(1.812461). The mean of Group One minus Group Two equals 0.83 Finally we performed that our implemented prototype 95% confidence interval of this difference: From shown the better performance rather than the original 0.00 to 1.66. For this reason we reject the null eBay site. hypothesis and accept the alternative hypothesis. Problem 5: In CM group, tcalc(0.7670) > ttab(0.260185) The mean In MM group tcalc(0.6202) > ttab(0.260185). The of Group One minus Group Two equals 0.33 mean of Group One minus Group Two equals 0.17. 95% confidence interval of this difference: From - 95% confidence interval of this difference: From - 0.64 to 1.30. For this reason we accept the 0.43 to 0.77 .For this reason we reject the NULL experimental hypothesis and reject the NULL hypothesis and accept the alternative hypothesis. hypothesis that there is a significant difference between the original eBay site and our implemented In CM group tcalc(1.3416) > ttab(0.699812). The mean prototype. But user complexity analysis of this of Group One minus Group Two equals 0.50. 95% problem, there is little bit better performance shown confidence interval of this difference: From -0.33 to in our implemented prototype with respect to the 1.33. For this reason we reject the NULL hypothesis original eBay site. and accept the alternative hypothesis. We combine the user test of CM and MM group and performed statistical analysis that tcalc(1.8184) > 11
  • 12. We combined the user test of CM group and MM To analyze the heuristic evaluation using the link group and test the statistical hypothesis. In the terms make sense and the images alternate text. combination of CM and MM group the tcalc(1.4306) Future step can also have to compare internal site > ttab(1.372184). The mean of Group One minus structural navigation for usability testing. Group Two equals 0.33. 95% confidence interval of this difference: From -0.15 to 0.82. For this reason 7. CONCLUSION this difference is considered to be extremely The original eBay website does not provide user statistically significant. satisfaction, efficient user browsing functionalities according to our experiment and result analysis. Our Problem 6: implemented prototype improves the user satisfaction, In MM group, we can not analyze the perfect browsing functionalities by correcting and adding statistical test. Our implemented prototype complexity some user friendly functionalities with respect to the is 2 and the original prototype complexity is 5. For original eBay website and our experimental result this reason, we performed that our implemented have shown that our implemented prototype is better prototype shown the better performance rather than than the original eBay website. Finally, our the original eBay site. implemented prototype removes some usability problems of the original site and improves user In CM group tcalc(2.5649) > ttab(2.22814). The mean interfaces which would be the example for the eBay of Group One minus Group Two equals 1.67. 95% designer. confidence interval of this difference: From 0.22 to 3.11. For this reason we reject the NULL hypothesis 8. REFERENCES and accept the alternative hypothesis. [1] http://www.mariosalexandrou.com /definition/ecommerce.asp The result of statistical test of combined CM and MM group: tcalc(6.8461) > ttab(3.16927). The mean of [2] http://mashable.com/2006/04/26/ebay-express-ebay- Group One minus Group Two equals 2.33. 95% made-easy confidence interval of this difference: From 1.63 to [3] http://www.ebay.com 3.04 for this reason this difference is considered to be extremely statistically significant. [4] http://www.wdvl.com/ Authoring/ Design/ Usability/ use3_1.html Finally, we analyzed that our implemented prototype shown the better performance rather than the original [5] http://www.otal.umd.edu/SHORE2000/webnav/ eBay site. introduction.html 5. RESEARCH PROBLEM [6] Noah Lazar and Michael Eisenbrey °Website Structural Navigation°, Department of Computer We faced the following problems when we take our Science, University of Maryland, 2000. experiment: Some users were unknown to use eBay website. [7] Angela Colter, Kathryn Summers, Cheri Smith, Most of the user did not understand the questions “Exploring User Mental Models of Breadcrumbs in properly to find difficulties. Web Navigation, University of Baltimore, User felt confused about the very difficult and School of Infrmation Arts and Technologies. difficult context of the research methodologies [8] http://www.graphpad.com/quickcalcs /ttest1.cfm questionnaires. 6. FUTURE STEPS In this report, we have analyzed the heuristic evaluation using Nielsen principles on Structural Navigation mainly. We think that future steps would be 12

×