AQA Psychology A Level 2021 Paper 2 MS

AQA Psychology A Level 2021 Paper 2 MS Study of capacity of STM Miller (Immediate Digit Span Test) Jacobs Support Study of duration of STM Peterson and Peterson (Trigrams) 24 students given a consonant syllable and a three digit number ie. THX 512. They were asked to recall the consonant syllable after a retention interval of 3, 6 , 9, 12 or 15 seconds. During this interval they had to count backwards from their three digit number. Participants were 90% correct after 3 seconds, 20% correct after 9 and only 2% correct after 18 seconds. Suggesting it is less than 18 seconds. Study of duration of LTM Bahrick (Free recall, photo recognition and name recognition tests) 400 people of various ages were tested on their memory of high school classmates. They were given a free recall to recall as many class mates as they could. Then they were given 50 photos, some with people from their school year book. Bahrick found that recall after 15 years of graduation was 90% accurate from photos, and after 48 years was 70%. With free recall it was about 60% accurate and 30%. Showing that it is possibly an unlimited duration for LTM.