Abstract: According to implementations of the subject matter described herein, there is provided a solution for error diagnosis and feedback. In the solution, a signal sequence is obtained; it is determined, based on a learning object, that an error is detected at a target position of the signal sequence; and a target error pattern corresponding to the target position of the signal sequence is detected. In accordance with a determination that the target error pattern matches one of a plurality of predetermined error patterns associated with the target position, a target feedback corresponding to the matched predetermined error patter is selected from a plurality of feedbacks corresponding to the plurality of predetermined error patterns; and the target feedback is provided. Through this solution, more accurate and effective feedback on different error patterns can be provided.