This research investigates the effects of different video modalities(Mode A,image+scripts -b-sound; Mode B, image4- scripts ; Mode C, image+ sound) on the incidental vocabulary acquisition by Chinese non-English majors. The results are as follows:in terms of the morphological recognition of words, Mode B is significantly better than Mode A which in turn is significantly superior to Mode C; in terms of the morphological retention of words,Mode B has the best effect,while the difference between Mode A and Mode C is not significant;in terms o...