Participants in a within-subjects experiment are performing an odor identification task in which the smell of vinegar is presented at a particularly high concentration. The smell that follows the presentation of the vinegar is always poorly identified, regardless of which odorant it is. What should be a concern for this experimental design

What were some characteristics of the yamato culture select all that apply a. it was a very weak empire with little knowledge of trade b. it believed its people were descended from kami the sun goddess c. it allowed woman to hold positions of power d. it developed technologies that improved life and increased trade e. its leader tokugawa brought peace to japan