user behavior - Opt-ins versus opt-outs in forms - does nobody else care?

Whilst filling out a form on the Royal Mail site this morning, I came across this heresy of form design: the self-negating checkbox...

This required careful (re)reading to ensure that:

1. I was actually opting out of the first set of marketing questions


2. I did not have to tick the second group of boxes as these were default opt-out



3. ... I was not actually going crazy

The mixed metaphor is confusing enough to me, but I was under the impression that (in EU countries at least) the legal requirement was for all marketing preference questions to now be opt-in by default, not opt-out?

Has any notable comparative research been done into opt-in versus opt-out options on forms to see which are more annoying / easier to understand? The inconsistency across sites just from one country is mindboggling, never mind an apparent lack of international standard. Is it just me failing to wrap my head around things still being opt-out by default or does nobody else actually care?

Answer

Mixing opt-in and opt-out is totally bad UX as it leads to a lot of confusion. The meaning of both lists should be consistent, so there should be either opt-out or opt-in for both groups:

Do you want to receive information from us by:

[]post []phone []email []SMS []

Do you want to receive information from our carefully selected premium partners:

[]post []phone []email []SMS []

The reason for mixing the opt-in and opt-out mechanisms may, however, lie in some legal requirements (it sometimes leads to such situations). However, even in this situation it could be presented in a more clear way, e.g.:

Select the options below TO RECEIVE information from us:

[]post []phone []email []SMS []

Select the options below NOT TO RECEIVE information our carefully selected premium partners:

[]post []phone []email []SMS []

Regarding the opt-in and opt-out performance, please refer to this study, showing that opt-ins have significantly better conversion: http://mashable.com/2011/11/28/mailing-list-performance/ Opt-outs during a registration process are confusing and irritating, so it's actually close to adding people to a list without their knowledge.

From my point of view, these results are quite understandable, because:

• as opt-outs are confusing and users tend to not read the text carefully, they may consider opt-out as opt-in (so they select all the options to get the information not having noticed that they actually opt-out). In this case they will not receive the information at all if they click all the options and will receive the undesired information though they think they have not agreed on it (if they don't tick the options).


• the CTA in opt-outs calls to opt-out, and CTA is allways suggestive; so if someone tells me to opt-out, I just do.