HCI Exercise 2b

Human-Computer Interaction SS 2023

Exercise 2b: Heuristic Evaluation (HE Report)

1 Aggregate the Individual Findings

  1. Assemble the individual log files and associated video clips from each evaluator in your group.

  2. As a group, form a combined (aggregated) list of problems (and a combined list of positives) using the spreadsheet helist.xlsx as a template:

    • If the same (or very similar) findings are found by two or more evaluators, combine them into one.

      You then have mulptiple video clips to illustrate the finding.

    • If the same (or very similar) findings are found on two or more devices, combine them into one.

      You then have mulptiple video clips to illustrate the finding.

    • List many small related issues (such as 15 individual typos) as one problem with many instances (rather than 15 problems).

      The same for many examples of German content not being available in English (or vice versa).

    • Indicate which problems were found by which evaluator(s).

    • For each problem, determine whether the problem is general to all browsers and platforms or specific to a particular browser or platform. Or, if it only occurs when cookies are disabled, or when an ad blocker is used. In such cases, indicate this in the “Only When...” column. If a problem is general, leave the corresponding cell empty.

    Proceed analogously for the positive findings.

  3. Individually (not working together), assign severity ratings to each problem. Use the 0--4 integer severity scale below:

    4Catastophic Problem
    3Serious Problem
    2Minor Problem
    1Cosmetic Problem
    0Not a Problem

    Individual ratings must be integers, fractional ratings are not allowed.

  4. Individually (not working together), assign positivity ratings to each positive finding. Use the 0--4 integer positivity scale below:

    4Extremely Positive
    3Major Positive
    2Minor Positive
    1Cosmetic Positive
    0Not a Positive

    Individual ratings must be integers, fractional ratings are not allowed.

  5. Calculate the mean severity rating for each problem to 2 decimal places. Calculate the mean positivity rating for each positive finding to 2 decimal places.

  6. Sort the problems into descending order of average severity (most severe first). Sort the positives into descending order of average positivity (most positive first).

  7. Renumber the problems and positives, so that the finding at the top of each list is number 1. We will call these the ranked finding numbers. The top-ranked positive finding will henceforth be named P01, the second-ranked positive finding P02, etc. The top-ranked negative finding will be named N01, the second-ranked negative finding N02, and so forth.

  8. For each finding, enter the names of all available video clips for that finding into the column “All Available Video Clips” in the spreadsheet.

  9. For each finding, select the best (most representative) available video clip(s) to illustrate the finding.

    It often makes sense to include multiple video clips to illustrate one finding. For example, if they show different aspects of the same issue (say, one on mobile and the other on PC). Do not always select every available video clip from every evaluator for every finding. Typically, there will be one to three video clips per finding.

  10. Copy and rename the selected video clips for each finding, so that the ranked finding number is prepended to the file name, according to the following scheme:


    where n indicates a negative finding (problem) and p indicates a positive finding, NN is the ranked finding number, EE are the lower case initials of the evaluator, and posXX or negXX is the original numbering in discovery order. For example:


    where n01-ka-neg01-links-yellow.mp4 is one of the selected video clips illustrating the highest ranked (most severe) problem N01 and was found by evaluator KA.

  11. Enter the new names for each selected video clip into the column “Selected Video Clip(s)” in the spreadsheet.

  12. Transfer the sorted lists of problems and of positives into simple XHTML5 tables.

    Do not just save the spreadsheet from Excel as HTML, since this creates bloated HTML code, which will not be valid XHTML5.

    For example, save the spreadsheet as a CSV (comma seperated value) file and then use a text editor to manipulate it:

    • Replace the commas with HTML cell boundaries (</td><td>).
    • Prepend an initial <tr><td> to the first cell and append a final </td></tr> to the final cell on each row.

    If you know Perl, you might also use a Perl script to generate simple XHTML5 table entries from a CSV file. I have an example Perl script (rename it to csv2html.pl).

    The column “All Available Video Clips” is not required (and should not be included) in the HTML5 table in the final report. It should still be contained in the spreadsheet you hand in.

    You could, say, make a temporary copy of the spreadsheet where the column is deleted and save the CSV from there.

    The column “Selected Video Clip(s)” is simply called “Video Clip(s)” in the HTML5 table in the final report.

2 Write the Heuristic Evaluation Report

Write a report of the heuristic evaluation using the skeleton report provided:

  1. Some title information indicating the group number, the title/topic of the evaluation, and the name of each group member.

  2. A summary of the evaluation and the most important findings written for your client's management. In real life, a manager would typically not have time to read the whole report, but would read only the executive summary to find out how the evaluation was done and what the main findings were.

    The description of the evaluation scope and procedure should take up no more than 25% of the executive summary. Most of the executive summary should summarise the main findings.

  3. A description of the methodology behind a Heuristic Evaluation, in your own words. Assumptions made about user characteristics and groupings and the extent of the evaluation.

  4. A description of the evaluation environments (hardware, browser version, OS, date of evaluation, etc.) used by each evaluator.

    Explain how each evaluator extracted or created video clips on each particular evaluation device or platform, and how they were edited and transcoded if necessary.

  5. Discussion of three most positive findings, each illustrated with a video clip.

  6. Aggregate table of positive findings in descending order of positivity.

  7. Analysis and discussion of the five most severe problems (the top five from your sorted list), each illustrated with a video clip.

  8. Aggregate table of problems in descending order of severity.

For the HE Report:

3 Prepare the Presentation

4 Prepare Your HE Report Directory

5 Upload Your HE Report to Sapphire