Because Human Factors draws on a number of disciplines, relevant scholarly articles and conference proceedings can be found in either general databases/indexes that cross disciplines, or in ones specific to the area of interest. So for human factors in computers, use computer science databases; for human factors in medical devices, use medical databases, etc..
Some useful general and discipline-specific databases/indexes are listed in the box below. To learn more about resources in a discipline, look for a library guide for that discipline: