The present specification provides an error detection method performed by a terminal in a wireless communication system, the method comprising: determining whether a minimum slot offset from a base station has been detected, wherein the minimum slot offset is a slot offset associated with an expectation that the terminal should receive a physical downlink shared channel (PDSCH) on the basis of at least one slot offset having a value equal to or greater than that of the minimum slot offset; detecting an error relating to detection of the minimum slot offset; and performing a fallback operation on the basis of the error detection.