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