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7
votes
2answers
218 views

Why can't you turn off your iPhone with Siri?

With the help of Siri (voice interface), people can have a call, add tasks, have a search. I give a command for turning off my phone but Siri said that "It is beyond my skills". I tried again and Siri ...
3
votes
4answers
48 views

Disabling command vs error message

In the diagram editor I am developing users can delete most of the nodes in the diagram, except a central node that is treated specially and can't be deleted. To block the user from deleting this node ...
9
votes
6answers
3k views

How many steps should a checkout process have?

I'm currently auditing an e-commerce website, and I noticed that the checkout process has 3 steps: Login/registration Delivery address/payment Verify/place order The page of the step 2 is quite ...
1
vote
2answers
138 views

How to design user friendly aliases for command line interface element identifiers?

I've run into this problem, i'm making a CLI that enables the user to make bookmarks, notes or comments on elements. Each element has it's internal unique identifiers and usual entity stuff. The ...
11
votes
4answers
428 views

Is it better to use a positive or a negative command for a button, checkbox, etc.?

I have some checkboxes that should include/exclude some content on some reports. But I am not sure if I should use: Include all items or Exclude unused items for the text of the checkbox. What ...
14
votes
3answers
1k views

Save vs Save & Exit

We're desigining an application for creating personalized photo books through a Flash-based interface. When the application first opens, we display a dialog encouraging the user to give their project ...