A method of operating a biological interface is disclosed. The method may include obtaining an input physiological or neural signal from a subject, acquiring an input set of values from the input signal, obtaining a predictive signal from the subject or the environment, acquiring a predictive set of values from the predictive signal, training a decoder function in response to data from the predictive set of values, performing at least one calculation on the input set of values using the decoder function to produce an output set of values, and operating a device with the output set of values. A biological interface system is also disclosed. The biological interface system may contain an input signal sensor, an input signal processor, a predictive signal processor, a memory device storing data, and a system processor coupled to the memory device and configured to execute a decoder function.
