Reconstructive Memory
Loftus and Pickrell (1995)
Participants
Procedure
Aim
Results
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Meaning
Retrieval of memory is influenced by perception, beliefs, experience, cultural factors, and context in which we are recalling
Objectives
Know that such memory is subject to distortion or changes
Understand the implications of relying on reconstructive memory
Understand reconstructive memory
Realize that memory may not be as reliable as previously thought
Errors after meaning
Schema influences what is encoded and retrieved from memory Some information might be dropped to streamline memory processing
Based on the idea that memories are not saved as complete, coherent wholes Instead it is points of data about the object or event
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Bartlett argued that we try to make sense of the past by adding our interpretations of events and deductions of what happened
memory is an imaginative reconstruction of experience
determine if false memories of autobiographical events can be created through the power of suggestion
21 females and 3 males
Questions asked before experiment to sibling or parents of participant:
Reasoning for the false memories is thought to be because of the schema or stereotype of being lost in a mall (data points of being lost in a mall)
Participants received a questionnaire in the mail It asked the participants to write about 4 memories then mail back the questionnaire
Could you recall three childhood memories of the participant
Do you remember a time when the participant was lost in a mall
Participants were interviewed twice over a period of 4 weeks. They were asked to recall as much information as they could about the events
They were then asked to rate their level of confidence about the event from 1 - 10
3 are real events
1 is getting lost in a mall
if they do not remember the event, write “I do not remember this”
After the second interview, they were debriefed and asked to guess which memory was fake
25% of the participants “recalled” the false memory
ranked this memory as less confident than other memories
Evaluation
The study does not tell us why some participants were more susceptible than others
It was possible to verify the memories through the involvement of parents and siblings
Although this is often seen as strong evidence of the power of suggestion, only 25% had them
high ecological validity as people were talking about childhood memories
The research was applied in areas of eyewitness testimony and therapy
It’s difficult to know whether this is “true” false memory or distortion of another
Ethical concerns about deception about making the participant believe in a false memory
The questionnaire could be contaminated as it was filled at home
There could be demand characteristics, such as social desirability
Loftus and Palmer (1994)
Experiment 1
Procedure
Results
Participants
Evaluation
Aim
Experiment 2
Procedure
Results
Participants
Evaluation
Aim
Investigate whether the use of leading questions would affect estimation of speed.
45 student
Questions were based on the assumption “hit” and “smashed” have different connotations and schemas
Researchers predicted the word “smash” would result in higher estimation
IV were the words and DV was the estimation of speed
Participants were asked about the speed of the car in different ways
(ex. How fast were the cars when they smashed/hit/collided with each other?)
Students were divided into 5 groups of 9 students each.
Participants watched a total of 7 films of traffic incidents taken from the driver's education films with lengths ranging from 5-30 seconds.
Participants were asked to give an account of the accident and answer a questionnaire with different questions, with a critical question being to estimate the speed
The critical questions had different words depending on the group
The words were “hit”, “collided”, “smashed”, “bumped”, “contacted”
Bumped
Colided
Hit
Smashed
Contacted
40.8mph
39.3mph
38.1mph
34.0mph
31.8mph
changes in speed could be the schema of the word
Most people would have a problem estimating the speed of a car
Students are a small sample size, and were most likely young and inexperienced drivers, which may have affected their estimation.
Confounding variables are controlled so only the effect of the independent variable is measured.
Films were made for teaching purposes and therefore participants did not receive the same emotions they would have for a real accident.
Experiment was a lab experiment and participants were students, variables were controlled but a low ecological validity
Investigate if participants who estimated high in experiment 1 would say the saw broken glass in the second experiment (expected result)
150 students
Participants watched one minute of film containing clips of car accidents all about 4 seconds each.
Participants were asked to describe the accidents in their own words and answer a few questions about the film they just watched.
students were divided into 3 groups of 50 students each.
Group 1 was asked “How fast were the cars going when they smashed into each other?”
Group 2 was asked the same but replaced smashed with hit
Group 3 was not asked this question and became the control group
A week later the participants came back to answer 10 questions about the film.
A critical question was “Did you see any broken glass?” with a yes or no answer
There was no broken glass in the video, but researchers assumed broken glass was associated with high speed
Top speed for different words
Did you see any broken glass?
Hit
Smashed
control
10.46mph
8.00mph
"Hit" group
"smashed" group
16 yes, 34 no
7 yes, 43 no
6 yes, 44 no
Results supported the hypothesis of the researchers
Results can be interpreted in Bartlett’s theory where people change details when trying to remember things.
This is probably what happened to the participants when they were given information through the key words of either “smashed” or “hit”
Participants could also have used past knowledge (Schema) of serious car accidents to make the decision of whether they saw glass or not.
The study could also be accused of lacking ecological validity and therefore may be difficult to generalize its findings to real life.
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Ronald Cotton (case study)
Experiment 1
Aim
To have a better understanding of why the victim was so convince that Ronald Cottons was her rapist.
Conclusion and resolution
Witnesses tend to pick on people in similar clothes rather than physical characteristics, therefore all suspects should be wearing the same cloths in a line-up instead of other clothing that looks similar to the described one.
All members of the line-up should fit the suspect description, in addition to that, witnesses should be told that whether the suspect was in the line-up or not.
Culter & Penrod advocate sequential line-ups. The accuracy of identification increases when suspects are seen one by one and an identification is made (yes/no) after each person is presented instead of in a row. Finally, witnesses should not be given feedback that confirms their identification.
Researchers use a narrative interview style called a Cognitive interview.
Other strategies that are often employed in a interview
Narrative interview - very few questions asked and interviewee does the talking except for clarification. So schema doesn't get altered this way.
The cognitive interview begins with context reinstatement since we have better recall when we are in the same place, the same emotional state, and/or the same context in which memory was encoded.
Based upon Tulving & Thomson's Encoding Specificity Hypothesis (1973). Which states that before asking someone to retell what happened, the police would have the interviewee think about where they were when they witnessed the crime and how they felt at the time.
Changing the perspective. This involves asking the person to "think outside of their
schema." What do you think that the bank teller saw?
Change the order. This breaks down the role of schema in “filling in” information. Researchers have found that more information is obtained if the witness is asked to recall events forward and backward than simply retelling the story