A human factors specialist (or ergonomist) attempts to facilitate the operation of machinery so that ordinary people can use it efficiently and safely

A researcher observes the play activities of children at recess. The videotape of these play activities serves as the

a. experimental effect. b. observation record. c. observational empiricism. d. scientific record.

Rejecting someone's romantic interest in you is likely to make you feel ________________

Fill in the blank(s) with correct word