Fudan University undergraduates (N=19.; 13. women and 6. men) ranging in age from 18. to 31. years volunteered to participate. The participants are randomly assigned to the detect-T1. condition; the remainders were assigned to the ignore-T1. condition.
What information is not introduced in the paragraph above?
A.The demographic characteristics of the participants. B.The way they are selected. C.The restrictions of the participant pool. D.The way they are grouped.正确答案C
