I’ll use eye tracking to assess a lot of famous user interfaces—including Web sites like Amazon.com®, Google™ News, and eBay®; and desktop items—and evaluate quantitative eye tracking data to provide best outcomes for rudiments like navigation systems, menus, and forms, and for valuable ad postings.
Discount usability testing came into being in the early days of internet. It helped somehow to provide an uncomplicated, quick, and rather cheap way of performing usability studies and improved clients’ familiarity with the Web and other software user edge. But, such studies are generally qualitative and one-sided. Eye tracking on the other hand offers exceptional reimbursement and makes available a useful substitute to typical discount usability testing.
Regular implementation of Eye tracking techniques
Very little have been written on eye tracking, which is strange taking into account what a useful practice it is. Back in 2000 and 1998, articles were published on the importance of eye tracking by Jacob Nielsen and Jared Spool’s. These early articles were published before latest inventions in eye tracking technologies. The silence of usability expert on the issue of eye tracking since then is rather shocking to me. Eye tracking is not a difficult subject. It is an uncomplicated and efficient way of appraising Web pages and user interfaces.
Luckily, things are taking a turn now. If you go through Steve Krug’s publication “Don’t Make Me think”, you will see a graph that look a lot like a gaze plot. Eye tracking nowadays has enabled us to precisely evaluate the sort of gaze patterns that Krug had shown.
Things you need to know about Human Eye
Our sight possesses a visual field of about 120 degrees, encircling three extents of visual acuity: foveal, parafoveal, and peripheral vision. We receive visual data from our surrounding through the fovea, and then we make head and eye movements in order to focus the fovea on desired object to be seen.
Human eye has two states of movement:
The Human brain practically puts together the visual images that we obtain through consecutive fixations.
How Eye tracker functions
Eye tracker, is an instrument that is designed to capture data equally during saccadic movement and fixations of the fovea.
Eye tracker is operated by using a remote. By using a digital eye tracker, we can witness saccades and fixations, the duration of each fixation, the space to the eye, the pupils’ diameter etc in a precision of about half a degree.
Eye gaze interpretation software produces a range of graphs that are helpful for data analysis, as follows:
- Hotspots— activities of a set of test subjects can be generalized using Hotspots. They are more or less similar to heat maps.
- Gaze plots— uses a single eye tracking test to come up with a complete image of all the eye-gaze data.
- Gaze replays— measures both real-time and slow-motion replay of the tracks a client’s eyes follows.
Gaze plots and gaze replays are much more useful compared to hotspots. As they allow an assessor to see through each individual client’s eyes.
By evaluating the angles between saccades or the space between two fixations can disclose a lot of points about a client’s views, and an Eye tracker provides a potent set of tools for doing so.
Assessing Usability by implementing Eye tracking
Eye tracking has brought into work quantitative measurements with the aim of usability evaluation, which was previously merely based on mostly qualitative data. If you are video capturing or logging data in a usability test session, the think-aloud protocol enables you to gather qualitative data like client’s frame of mind by assessing nature of voice and facial expressions, while on the other hand Eye tracker is a measure of quantitative data that includes pupil diameter, fixation matches, fixation measurement lengthwise, saccade angles in degrees etc. If the results gathered by these two approaches are summed up, they present a broad outline of the problems a user come across in a user interface.
We can now easily find out things like the best location for the labels of fields in a form, the most favorable position for a navigation bar, or the most noticeable site for a logo or an advertisement by estimating gaze data that shows the fraction of clients observing them. And eye tracker is the tool that has made this possible.
In this way, we can perk up the usability and effectiveness of Web pages and software applications these days.
Eye tracking entering latest Interaction Paradigms
The two worthy possible applications for eye tracking technique are Usability and selling studies. I am working on how we can take full benefit of eye tracking competence and working in order to explore improved interface paradigms. For example, by evaluating the screen focuses of a client’s gaze, eye trackers can do the following wonders:
- Permit clients to use their eyes as input tools, thus building innovative and less artificial and conservational means to interrelate with systems.
- Can offer the means for a system to make out where a client’s concentration is alert while evaluating or intermingling with a user interface and even helps to get an idea about what a client is planning to do next.
- Can explore a driver’s intensity of thoughtfulness while driving and avoid sleepiness responsible for most road traffic accidents.
What are we expecting to happen next?
Eye tracking has made possible a comparatively rapid and simple way of accomplishing studies of any kind, making it achievable for me to summarize reports on eye tracking studies every other month in UX matters. Making use of these researches, I will assess exact user targets and communications with Web pages and other user interfaces.