MIXER Telephone Study
How to Make Calls
Please note: Your PIN is important! You will need your PIN to make or receive calls. If you do not know what your PIN is, please refer to your introduction email or contact us at participant-care@ldc.upenn.edu.
There are two ways to participate in a call.
(1) You may call into the telephone system at our toll-free number:
1-866-381-2878
at any time from 3pm to midnight (we recommend that you call within the first 10 minutes of the hour to increase likelihood of being connected to another participant). OR
(2) Our telephone system will call you during the evening on the day(s) you selected for being available when you registered.
In either case, the system will ask you to enter your PIN, so please have this available for when you get a call. You will then be asked a couple of questions about the kind of phone you are using, and put on hold while we try to connect you with another participant.
Please note that calling the platform is a great way to complete your 5 unique phone calls. Remeber that a unique phone is one that you use only once in the study. We suggest that you try to complete your unique calls early in the study. This will help insure that you receive the $50 unique call bonus. Be sure to use a phone that does not use Call ID Block. MIXERR uses your Call ID to distinguish phones.
Please be advised that when the telephone system calls you, our number will appear as 215-573-9458 on your Caller ID device, if you have one.