Why did Peterson and Peterson have participants count backward during the delay interval in their experiment on short term memory?
During the pause, they were asked to count backwards in 3’s from a given number. This interference task was prevent rehearsal. The longer the interval delay the less trigrams were recalled.
What was the procedure of Peterson and Peterson study?
After hearing a trigram participants were asked to count backwards in threes or fours from a specified random number until they saw a red light appear (then they recalled the trigram). This is known as the brown peterson technique, and the purpose was to prevent rehearsal.
What is the function of the distractor task in the Brown Peterson Paradigm?
The purpose of the task was to prevent rehearsal, and the task chosen was counting backwards by 3 or 4 from a 3-digit number. The distractor task lasted between 3 and 18 s. The data showed that the probability of correctly recalling the trigram decreased as the length of the distractor task increased.
Is short-term memory loss real?
Short-term memory loss is when you forget things you heard, saw, or did recently. It’s a normal part of getting older for many people. But it can also be a sign of a deeper problem, such as dementia, a brain injury, or a mental health issue.
How are trigrams presented in Peterson and Peterson?
Trigrams were presented one at a time and had to be recalled after intervals of 3, 6, 9, 12 or 18 second. To prevent rehearsal participants were asked to count backwards in three or fours from a specified random number
What did Peterson and Peterson do in 1959?
In 1959, they conducted an experiment that revealed how time between remembering something and having to recall it affected the life of a memory. What is at Trigram, and why use it? Peterson and Peterson showed participants a trigram – a set of 3 consonant letters, such as ADW.
What are the results of the Brown Peterson technique?
This is known as the Brown Peterson technique. Results: After 3 seconds, 80% of the trigrams were recalled correctly and after 6 seconds it fell to 50% then at 18 seconds, less than 10% of the trigrams were recalled correctly. It was also found that short-term memory has a limited duration when rehearsal is prevented.
How did Peterson and Peterson test their hypothesis?
They tested the hypothesis that information that’s not rehearsed is lost quickly from short-term memory. Procedure: A lab experiment was conducted where 24 participants who were all psychology students had to recall trigrams which is three consonant syllables.