In a Classic Study on Memory, the Researcher Showed People

Multiple Choice

In a classic study on memory, the researcher showed people 2,560 photographs at a rate of one every ten seconds.Each person was then shown 280 pairs of photographs with each pair having an "old" picture (from the first set of photos) and a similar "new" image.The subjects were able to tell which photograph they had seen before in what percent of the paired photographs?

A) only five percent
B) 15 to 25 percent
C) 45 to 55 percent
D) 85 to 95 percent