Browse source code
Chris @ oTree
Recipes for common tasks in oTree
'Are you sure?' popup based on the user's input
Back button for multiple instructions pages
Chat with experimenter, using Papercups
Comprehension test. If the user fails too many times, they exit.
Configurable players per group. See here: https://otree.readthedocs.io/en/latest/treatments.html#...
Count button clicks (hidden input)
Of course oTree has a readymade chat widget described here: https://otree.readthedocs.io/en/late...
Detect and block mobile browsers
Dropout detection (if user does not submit page in time)
Preserve same groups as a previous app that used group_by_arrival time.
group by arrival time, but in each round assign to a new partner.
Reads groups from a CSV file. Inside this app, you will find a groups6.csv, which defines the gro...
Longitudinal study (2-part study taking place across days/weeks) Another way to do longitudinal ...
Minimum time on a page
How to translate an app to multiple languages (e.g. English and German). There are 2 ways to def...
Timeout spanning multiple pages
Question that lets you select multiple options (multi-select, multiple choice / multiple answer)
Select a random round for payment
Read quiz questions from a CSV. (Also randomizes order)
Menu with an 'other' option that lets you type in a value manually
Quiz with explanation. Re-display the previous page's form as read-only, with answers/explanation.
Table where each row has a left/right choice, like the strategy method. This app enforces a singl...
For each participant, randomize the order of tasks A, B, and C. Task B has 2 pages, which are alw...
"Widget to rank/reorder items". See http://sortablejs.github.io/Sortable/ for more examples.
An image that changes when you move a slider. If your image is a some kind of chart, it's better ...
Slider with live updating label
Wait only for specific people
group_by_arrival_time timeout (continue with solo task)
Timeout on a WaitPage (exit the experiment)
Note: To open an *.otreezip file, enter:
otree unzip BLAH.otreezip