A Psychologist Is Hired by a Company to Determine Which

Multiple Choice

A psychologist is hired by a company to determine which of several commercials might be most effective at stirring television viewers' interest.The psychologist shows these commercials to a group of participants.Which measure is LEAST susceptible to demand characteristics?

A) participants' rank ordering of the commercials in terms of interest
B) participants' estimate of the likelihood that they would purchase the product based on commercial viewed
C) participants' pupil dilation during the commercials
D) participants' change in attitude towards the product before and after each commercial