Measuring Usability
Quantitative Usability, Statistics & Six Sigma by Jeff Sauro

Browse Content by Topic

Usability Testing (39)

Usability (24)

Sample Size (23)

UX (19)

Survey (18)

Statistics (17)

Usability Problems (15)

SUS (14)

Methods (11)

Questionnaires (11)

Task Time (11)

Net Promoter Score (11)

Usability Metrics (11)

User Research (9)

Rating Scale (9)

Card Sorting (8)

Problem Discovery (7)

Remote Usability Testing (7)

Satisfaction (7)

Information Architecture (7)

Heuristic Evaluation (5)

Task Completion (5)

SUPR-Q (5)

Confidence Intervals (5)

Benchmarking (4)

Mobile Usability Testing (4)

Lean UX (4)

SEQ (4)

Tree Testing (4)

Qualitative (4)

Findability (4)

Six Sigma (4)

A/B Testing (3)

Summative (3)

Loyalty (3)

Cognitive Walkthrough (3)

Confidence (3)

Formative Testing (3)

Regression Analysis (3)

PhD (2)

Errors (2)

Customer Experience (2)

Keystroke Level Modeling (2)

Problem Severity (2)

SUM (2)

Quality Assurance (2)

Margin of Error (2)

Credibility (2)

Task Failure (2)

Sampling (2)

Crowdsourcing (2)

Completion Rate (2)

UI Disasters (2)

ROI (2)

Clicks (2)

Geometric Mean (1)

Key Drivers (1)

Median (1)

Evidence Based Design (1)

iPhone (1)

Analytics (1)

Correlation (1)

Reliability (1)

Think Aloud (1)

Post-Task Ratings (1)

Task Times (1)

Persona (1)

Focus Group (1)

Salaries (1)

Ordinal (1)

Tasks (1)

Z-score (1)

Interval (1)

Marketing (1)

Visual Appeal (1)

Top Box Scoring (1)

Monte Carlo (1)

Return on Investment (1)

Ethonographic Research (1)

Effect Size (1)

Heuristic Evaluation Topics


How Effective are Heuristic Evaluations?

How Effective are Heuristic Evaluations?

Jeff Sauro • September 6, 2012

A heuristic evaluation of two websites from four evaluators found 32% of the issues 50 users had during a usability test. Heuristic evaluations typically find between 30% and 50% of issues found in usability tests. In general, HE is best used in addition to usability testing to generate the most complete picture of potential and actual interface problems.[Read More]


The Value of Multiple Evaluators in Heuristic Evaluations

The Value of Multiple Evaluators in Heuristic Evaluations

Jeff Sauro • August 14, 2012

We review an experiment where four independent evaluators inspected two websites (Budget.com and Enterprise.com). The results are consistent with earlier research: different evaluators find different issues, experts find more but not all issues compared to novices, and concerns about false alarms and misses persist with inspection methods compared to usability testing.[Read More]


The four corners of usability measurement

The four corners of usability measurement

Jeff Sauro • August 16, 2011

There isn't a single silver bullet technique or tool which will uncover all usability problems. Instead, practitioners should quadrangulate using the four corners of usability measurement: user testing, inspection methods, cognitive modeling and standardized questionnaires.[Read More]


What’s the difference between a Heuristic Evaluation and a Cognitive Walkthrough?

What’s the difference between a Heuristic Evaluation and a Cognitive Walkthrough?

Jeff Sauro • August 2, 2011

Heuristic Evaluations and Cognitive Walkthroughs are both usability Inspection Methods that can be used early and often in design to detect many of the problems seen in usability testing. Cognitive Walkthoughs have more of an emphasis on the learnability of a task. Both methods are best performed with multiple evaluators.[Read More]


6 things you didn

6 things you didn't know about Heuristic Evaluations

Jeff Sauro • August 31, 2010

Maybe you already have heard-of and use Heuristics Evaluations. Here are six things you might NOT know about this popular usability method.[Read More]

Newsletter Sign Up

Receive bi-weekly updates.
[3795 Subscribers]

Connect With Us

Our Supporters

Usertesting.com

Use Card Sorting to improve your IA

Userzoom: Unmoderated Usability Testing, Tools and Analysis

Loop11 Online Usabilty Testing

About Jeff Sauro

Jeff Sauro is the founding principal of Measuring Usability LLC, a company providing statistics and usability consulting to Fortune 1000 companies.
He is the author of over 20 journal articles and 4 books on statistics and the user-experience.
More about Jeff...

.

Jeff's Books

Quantifying the User Experience: Practical Statistics for User ResearchQuantifying the User Experience: Practical Statistics for User Research

The most comprehensive statistical resource for UX Professionals

Buy on Amazon

Excel & R Companion to Quantifying the User ExperienceExcel & R Companion to Quantifying the User Experience

Detailed Steps to Solve over 100 Examples and Exercises in the Excel Calculator and R

Buy on Amazon | Download

A Practical Guide to the System Usability ScaleA Practical Guide to the System Usability Scale

Background, Benchmarks & Best Practices for the most popular usability questionnaire

Buy on Amazon | Download

A Practical Guide to Measuring UsabilityA Practical Guide to Measuring Usability

72 Answers to the Most Common Questions about Quantifying the Usability of Websites and Software

Buy on Amazon | Download

.
.
.