What they can’t see can hurt you: improving grids for mobile devices by Randall Thomas #CASRO #MRX


Live blogged in Nashville. Any errors or bad jokes are my own.

Frances Barlas, Patricia Graham, and Thomas Subias

– we used to be constrained by an 800 by 600 screen. screen resolution has increased, can now have more detail, more height and width. but now mobile devices mean screen resolution matters again.
– more than 25% of surveys are being started with a mobile devices, less are being completed with a mobile device
– single response questions don’t serve a lot of needs on a survey but they are the easiest on a mobile device. and you have to take the time to consider each one uniquely. then you have to wait to advance to the next question
– hence we love the efficiency of grids. you can get data almost twice as fast with grids.
– myth – increase a scale of 3 to a scale of 11 will increase your variance. not true. a range adjust value shows this is not true. you’re just seeing bigger numbers.
– myth – aggregate estimates are improved by having more items measure the same construct. it’s not the number of items, it’s the number of people. it improves it for a single person, not for the construct overall. think about whether you need to diagnose a person’s illness versus a gender’s purchase of a product [so glad to hear someone talking about this! its a huge misconception]
– grids cause speeding, straightlining, break-offs, lower response rates in subsequent surveys
– on a mobile device, you can’t see all the columns of a grid. and if you shrink it, you cant read or click on anything
– we need to simplify grids and make them more mobile friendly

– in a study, they randomly assigned people to use a device that they already owned [assuming people did as they were told, which we know they won’t🙂 ]
– only have of completes came in on the assigned device. a percentages answered on all three devices.
– tested items in a grid, items by one by one in a grid, and an odd one which is items in a list with one scale on the side
– traditional method was the quickest
– no differences on means
[more to this presentation but i had to break off. ask for the paper🙂 ]

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