Published on February 4, 2014
SUCCESSFUL SURVEYS verb: to investigate the opinions or experience of (a group of people) by asking them questions 100% per cent of attendees surveyed were very satisfied with the NUX event* Oxford Dictionaries http://oxforddictionaries.com/definition/english/survey * I made that bit up
Usability tool? ”Surveys are not always thought of as usability tools since they are normally employed more for marketing-related tasks – asking users about their likes and dislikes." Braun et al: Usability: the site speaks for itself.
Advantages • carefully constructed surveys can: • provide good usability data • validate user requirements • expand upon user requirements • be used to preview new features or design changes • generate meaningful answers • supplement expert review • elicit facts • collect demographics about your users
When to survey? • at the beginning of a project • learn about current users and their needs • identify stakeholders • before a redesign • learn about current users and their needs • after launching a new or revised site • assess whether needs are met / not met • identify areas for improvement • have features or content rated or ranked • seek ideas for further improvements
Questions concerning … • If users are able to find the information they seek • How satisfied users are with your site • What experiences users have had with your site or similar sites • What users like and dislike about your site • What frustrations or issues users have with your site • If users would recommend your site to others • If users have any ideas or suggestions for improvements usability.gov
Online surveys • structured questionnaire that target audience completes over the internet • data (responses) stored in a database • survey tools provide some level of analysis • broad reach • low cost • quick and easy to launch • you need to have a clear idea about: • your purpose • how you will find participants
Points to consider • length of survey • keep as brief as possible • indicate how much time will be required • online surveys typically indicate progress - % complete • mix of questions • open ended and closed • follow up survey or interview • opportunity to ask more in-depth questions
RISKS OF QUANTITATIVE STUDIES Jakob Nielsen
“Beware number fetishism” “Number fetishism leads usability studies astray by focusing on statistical analyses that are often false, biased, misleading, or overly narrow. Better to emphasize insights and qualitative research” “qualitative delivers the best results for the least money” (Nielson, 2004)
Quantitative methods • quantitative research sometimes considered more scientific or credible v. insight-based studies • may reduce a complex situation down to mere numbers • beware bogus findings • be aware of limitations • e.g. test subjects in student projects may be other students who are not representative of mainstream users • tests of websites that are scaled-back designs with fewer pages and more limited content • good quantitative research may … • allow comparison and identifying trends over time • be expensive and difficult
Avoid taking the ‘wrong path’ • user interfaces and usability are highly contextual • their effectiveness depends on a broad understanding of human behaviour • experts tend to get better results than beginners from qualitative studies • even beginners will get (some) usable results
DON’T USE SURVEYS … Smashing UX Design
… to find out how something is used “What people say they do and what they actually do are often very different things.” “If you base your design decisions on what people tell you they do, and not what they actually do, your product will not be designed to support actual user behaviour.” However, there is another way …
CRITICAL INCIDENT TECHNIQUE A flexible set of principles for qualitative research
Origins • developed during WW2 • to identify effective and ineffective behaviours in a variety of military activities • subsequently developed as a tool for the systematic study of human behaviour • “think of some occasion during combat flying in which you personally experienced feelings of acute disorientation … describe what you saw, felt or heard that brought on the experience” (Flanaghan, 1954)
Purpose • to gather certain important facts concerning behaviour in a defined situation • no single rigid set of rules governing data collection • rather a flexible set of principles that must be modified and adapted to meet the specific situation at hand • a way of focusing the respondent’s mind on specific occurrence(s)
Key stages • General aims • aims or intended outcomes of the activity under investigation • Plans and specifications • instructions given to the observers of the behaviour • Collecting the data • interviews, group interviews, questionnaires and record forms • while the activity is ongoing or fairly recent • Analysing the data • summarise and describe the data with a focus on thematic content • Interpreting and reporting • present the findings in a usable form
Relevance • various studies have judged the method to be valid and reliable • capable of generating a comprehensive and detailed description of the chosen domain • set against more general debates in the social sciences about the validity and reliability of similar qualitative methods
Tip of the …
Reflective process • identifying effective and ineffective ways of doing something • factors that help and hinder • aspects that are critical in a specific situation • encourages participants to explore new ideas for problem-solving and make recommendations • can be used with concerned, informed insiders and interested outsiders
Uses • gathering data for the design or re-design of equipment • investigating the information needs or information-seeking behaviour of users • task analysis • identifying how decisions are made • performance evaluation and appraisal • determining critical requirements for a job
Can you recall … • an incident when … • you had no support or backup… ? • you felt good about something you had done … ? • you realised you did not know enough … ? • you were too busy … ? • aim of study to identify staff development needs • Harrington, 1992
Prompts • what device were you using? • who else was involved? • how did the task start / proceed / conclude? • did you know what you were doing at each stage? • what were your feelings during / after the incident? • what are your feelings now? • why was the incident critical for you?
Benefits • flexible • can be applied to multi-user systems • focus on important issues, e.g. safety critical • identify cause and severity • pick up issues that may not be detected by other methods • can be adapted to questionnaires or interviews • cost-effective Be aware that … • routine issues may not be reported • not suited to general task analysis • relies on memory so focus on recent events
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