Question

Exercise and memory A study of strength training and memory randomly assigned 46

young adults to two groups. After both groups were shown 90 pictures, one group had to

bend and extend one leg against heavy resistance 60 times. The other group stayed

relaxed, while the researchers used the same exercise machine to bend and extend their

legs with no resistance. Two days later, each subject was shown 180 pictures—the

original 90 pictures plus 90 new pictures and asked to identify which pictures were

shown two days earlier. The resistance group was significantly more successful in

identifying these pictures than was the relax group. What conclusions can we draw from

this study? Explain your reasoning.

Short answer

In a study comparing strength training and memory, 46 young adults were split into two groups at random. Following the viewing of 90 photos by both groups, one group was required to bend and extend one leg 60 times against severe resistance.

Step-by-step solution

Given information

In a study comparing strength training and memory, 46 young adults were split into two groups at random. Following the viewing of 90 photos by both groups, one group was required to bend and extend one leg 60 times against severe resistance.

Explaination

We may deduce that the difference in success rate in identifying photographs was caused by the difference in resistance versus no resistance. However, these findings should only be applied to persons who are similar to those in the study.