What is the major research error in the design of this experiment?

What is the correct order of disorders from the most to least severe?

A) minimally conscious state, persistent vegetative state, coma B) coma, persistent vegetative state, minimally conscious state C) persistent vegetative state, coma, minimally conscious state D) minimally conscious state, coma, persistent vegetative state

Psychologists Rowe and McKenna (2001) asked participants in one group to watch a video of a tennis player and make a judgment of the outcome of the point

Participants in a second group watched the video while engaged in a distracting behavior, generating a stream of random letters of the alphabet. In this study, the independent variable is a. a situational variable. b. a task variable. c. a subject variable. d. a instructional variable.