Survey incentives

Not sure if UX is the right place for this, but it is partly a behavioral economics question so I hope I’m in a reasonable place.
For a survey prize draw, has there been any research done to assess whether, everything else being equal, a…
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Should tags be inside or outside the input field

So tagging inputs are pretty common but there are generally 2 different approaches I see for displaying the tags:
The tags are below the input outside of the type-able space:
The tags are inside the input:
Now from a developer s…
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Category filter using checkbox, tag or most popular?

I’m in the process of creating a filter system for the category of restaurants. This category list can consist of dozens of items, while each restaurant can have only 3 categories. So if users selects at least one of the 3 categories, this…
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Mobile friendly master detail data entering

I am building a page that has to be mobile friendly. This page will have a lot of master detail data and I was wondering what the best practice is. I found a lot of articles on the web but they give, I would like to call them, abstract gui…
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Overlay Vs dedicated page or separate section within the page?

Context
We have this situation where we need to display additional information about products that users has selected.
The page in question is the page that houses the products, each product is displayed in a tile with some basic inform…
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Where should the icon to the mobile menu be placed?

I had a client bring up a good point recently about a mobile menu, specifically where should the “hamburger” icon be placed?
In looking at sites you see it in three common places, top right, top left or wherever the menu appeared on the …
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Pattern or strategy for showing hierarchical response content?

I’m expanding my app’s capabilities from this:
…to displaying all the rules that were applied, results for each rule, rule description, and link to more info.
I’d really appreciate pointers to apps which solve this kind of detail/de…
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Visualize realtime timeline chart

We have a system that collects events.
An event typically occurs every 10th second or so, but its pretty random.
The system collects the events during a project’s lifetime which usually runs for about a month.
We are currently presentin…
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How to show negative values in a pie chart?

I have a list of accounts and want to show the balances in a pie chart. That’s pretty straightforward as long as all of the accounts have a positive balance.
When some of the accounts have negative balances (such as a loan or an overdraft …
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Are there any documented best practices for in-app SaaS upgrade prompts?

I have a SaaS web app with 3 different plans. Each plan increases access to certain features or a large quantity of a particular feature. We’ll call them A, B and C with C being the highest level, most expensive plan.
Currently if you a…