Hot answers tagged sus
9
In general, SUS seems to be okay for web sites. Tullis and Stetson compared it with other usability surveys in assessing a corporate intranet, and SUS outperformed the others.
It sounds like a couple certain individual items may not be applicable for your work. To check for this systematically, create a correlation matrix of your item responses and ...
7
Comparing usability between systems (or within different versions of the same system) is explicitly the point of the System Usability Scale.
The point of SUS scores is that they're fairly vague, and since you're supposed to be comparing generally similar systems (why would you be comparing dissimilar systems?), they can be a quick and dirty way to get some ...
7
The System Usability Scale is mainly intended for a comparison between like systems. It's very general to allow it to compare systems, and it gives an easy reference point. It's generally assumed that the products you are comparing have similar use cases, which mitigates the problem of some questions not applying.
Comparing mortgage payment sites the ...
5
I looked for one myself some time ago and couldn't find anything. The thing is that the SUS was released as a free “quick and dirty” scale and nobody “owns” it in the way the Human Factors Research Group at UCC controls the SUMI.
Perhaps more importantly, there are now quite some published data on the English-language version of the SUS and its ...
4
In this type of questionnaires, the statements (called “items” in the technical literature) are not chosen mainly because they describe what usability is but because they are affected by it (i.e. the question is not “how does this affect usability” but “how does usability affect this”) and the ratings are correlated together. For the SUS, they were ...
4
For me it's a swings and roundabouts discussion. Each has some advantages and disadvantages.
Here are some pointers to some research / background that should help you decide between them:
A comparison of current approaches to usability measurement.
SUS: A Retrospective
A Comparison of Questionnaires for Assessing Website Usability
(and if you go for SUS ...
3
The take-home I get from Bangor, Kortun, & Miller (2009) that you cite in your comment is that there’s not much difference at least in the categories they used –all averaged in the 66-76 range, while individual product scores ranged from 30 to 94. With the quartile scores Bangor et al provide, you can convert a score you have into a percentile by making ...
2
Building on Jørn's answer: statistical analyses can help you compare a small group of high-quality users with the rest. Which tests are most appropriate will depend on your sample size and on the asssumptions you can safely make about the nature of your data (such as normally distributed, equal variances, etc.).
To compare the scores of two groups on the ...
2
On the contrary, all research emphasized how important it is to use the actual user group in your test and not the contractor or leadership.
Despite this, I believe that your planned studies are better than nothing. Every usability specialist has some kind of "quick and dirty testing"-advice or "do it yourself"-advice. And these advices do usually include ...
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