John Brown, Lloyd Peterson, and Margaret Peterson created a classic technique for assessing short-term memory. In this technique, people saw some stimuli, counted backwards by threes during the delay period, and then tried to recall the original stimuli. The results of their research showed that:.

after many previous trials, people had difficulty recalling the stimuli, even with only a short delay

Explanation:

John Brown was an Englishman while Lloyd Peterson and Margaret Peterson were Americans. They all carried out an experiment in determining the duration of short term memory.

They all discovered after after like three trials that people have difficulty in remembering things, even after a short or brief delay.

Lloyd Peterson and Margaret Peterson concluded that it was due to decay of the memory trace.

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