New answers tagged validation
In my experience triggering individual field validation on 'focus out' works well. It allows the user to complete / edit their typing without the feeling of being told they're wrong before they finish. Also it informs them at their point of focus - reducing the need to search around the form to find the fields with errors.
Giving a 100 year (since most people wont live above a 100) till the dob of your 13 year olds would make sense. then would be 1902-2002
Reducing the number of fields on a form typically increases conversions, however you can go too far sometimes. A user will have an expected number of fields for task, if you are asking for just an e-mail address when an user expects name, email and password. They might not be sure it's the correct form or as Zanon mentions might think it is a scam. Also as ...
As you have already asked about the security concerns at security.stackexchange.com, I can give my opinion about the UX perspective: Do you know any service where you register and it requires only a valid e-mail prior to filling your username/password/other data? I've never seen something like this. If you don't run a popular website, a few people ...
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