Is there a section on the IBM website that shows information about the readout error for the devices of quantum experience? I have only seen the errors for single-qubit (U2) and CNOT gates but nothing involving measurements.
If not, is there any suggestion about how to measure it? The only thing that comes to my mind is to run the ground state because any circuit would mix readout with gate errors. But I think that the resulting noise might as well be due to other factors like imperfect preparation of the ground state.