Memory Studies Flashcards
Coding-Baddeley-Method
He gave a different list of words to 4 group to remember; Group 1- Acoustically Similar Group 2- Acoustically Dissimilar Group 3- Semantically Similar Group 4- Semantically Dissimilar
Coding-Baddeley-Results
Participants were shown the original words and were asked to recall them in the correct order. They did this immediately after hearing them. Participants tended to do worse with acoustically similar words
Coding-Baddeley-Evaluation
-Artificial Stimuli-Findings have limited application
Capacity-Jacobs-Method
The researcher gave the participant a set of digits and they had to recall them in the right order
Capacity-Jacobs-Results
The mean digit span across all partcipants was 9.3 items
Capacity-Jacobs-Evaluation
-Limited Validity-results may have been effected by confounding variables
+Results of this study has been confirmed by other research
Capacity-Miller-Method
Miller noted that things come in sevens. He suggested that the capacity of the STM is 7
Capacity-Miller-Results
He noted that people can recall 5 things (due to chunking)
Capacity-Miller-Evaluation
-Miller may have overestimated the capacity of the STM. Future research has suggested that the capacity of the STM is 4. This suggest that the lower bond (5) is more accurate that Miller’s estimate
Duration-Peterson and Peterson-Method
24 undergraduate students took part in 8 trials (tests). During each trial, the student was given a trigram to remember and was also given a 3 digit number. The student was then asked to count backwards from their 3 digit number until told to stop. On each trial, they were told to stop after a different length of time
Duration-Peterson and Peterson-Results
As the amount of time the participants had to count for increased, the % of correct remembrance of their trigram decreased
Duration-Peterson and Peterson-Evaluation
-Artificial Stimuli, lacks external validity
+However, we do remember meaningless numbers in our daily life, so it isn’t that irrelevant
Duration-Bahrick-Method
392 participants from Ohio aged between 17 and 74 were tested. Their high school yearbooks were obtained. Recall was tested in various ways including:
- photo recognition test of 50 photos, some from their yearbook
- free recall test where they recalled all the names of their graduating class
Duration-Bahrick-Results
Participants who were tested within 15 years of graduation were about 90% accurate in photo recognition. After 48 years, this figure decline to 70%. After 15 years, free recall was about 60% accurate, dropping to 30% after 48 years
Duration-Bahrick-Evaluation
+High External Validity- real life memories were used
-Confounding Variables are not controls- Participants may have looked at their yearbook and rehearsed this for many years
More than one type of STM-Shallace and Warrington-Method
They did a case study of a patient with amnesia known as KF.
More than one type of STM-Shallace and Warrington-Results
They found that KF’s STM for digits was very poor when they were read out loud to him. His recall was much better when he read the digits himself. This could be because amnesia suffers might have another STM store for non-verbal sounds, according to further research
Working Memory Model-Shallace and Warrington-Method
Case study of KF