Reconstructive Memory Theory

LOFTUS AND PICKRELL (1995)

RONALD COTTON

LOFTUS AND PICKRELL (1995)

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DESCRIPTIONS

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EVALUATION

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ERRORS AFTER MEANING

Studies have been replicated and show a high degree of reliability

There is evidence that what is seen in the laboratory is seen in real life. (I.e Holocaust testimonies recalling events)

Research has been applied to improve the process of data gathering from witnesses. Additionally helps with understanding false memories

Many say studies lack ecological validity

Studies by Loftus under controlled conditions are open to criticism, as they are artificial in nature (i.e being in an actual accident compared to labs)

Ethical concerns about manipulating participant’s memories. (I.e deception in the Lost in the Mall study)

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 saved as points of data about the object or event

Retrieval of memory is influenced by perception, beliefs, experience, cultural factors, and context in which we are recalling

Schema links to reconstructive memory as it provides data points for our memory to use

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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

He argued that memory is an imaginative reconstruction of experience

Aim

Participants

Procedure

To determine if false memories of autobiographical events can be created through the power of suggestion

3 males, 21 females

Before the study, a parent or sibling was contacted and asked two question:

Participants received a questionnaire in the mail. It asked the participants to write about 4 memories then mail back the questionnaire

Three events were real, one was “getting lost in the mall”

Instructed that if they do not remember the event, write “I do not remember this”

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

After the second interview, they were debriefed and asked to guess which memory was fake

"Could you retell three childhood memories of the participant"

"Do you remember a time when the participant was lost in a mall"

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Evaluation

Results

25% of the participants “recalled” the false memory. However, they ranked this memory as less confident than other memories

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)

Although this is often seen as strong evidence of the power of suggestion, only 25% had them

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

Ecological validity was high 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

EXPERIMENT 2

EXPERIMENT 1

Participants

Procedure

Aim

Aim

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Investigate whether the use of leading questions would affect estimation of speed.

45 student participants

Participants were asked about the speed of the car in different ways. (i.e How fast were the cars when they smashed/hit/collided with each other?)

Questions were based on the assumptionhit” 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

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.

They 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

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Results

Evaluation

Smashed - 40.8 mph

Bumped - 38.1 mph

Hit - 34.0 mph

Contacted - 31.8 mph

Collided - 39.3 mph

Experiment was a lab experiment and participants were students

This means variables were controlled but a low ecological validity

Films were made for teaching purposes and therefore participants did not receive the same emotions they would have for a real accident.

Confounding variables are controlled so only the effect of the independent variable is measured.

Students are a small sample size, and were most likely young and inexperienced drivers, which may have affected their estimation.

Most people would have a problem estimating the speed of a car

Participants

Procedure

Investigate if participants who estimated high in experiment 1 would say the saw broken glass in the second experiment. Researchers hypothesized that this would happen

150 student participants

150 students were divided into 3 groups of 50 students each.

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.

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

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Group 2 was asked the same but replaced smashed with hit

Group 3 was not asked this question and became the control group

Group 1 was asked “How fast were the cars going when they smashed into each other?”

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Results

Smashed: 10.46 mph

Hit: 8.00 mph

Control

16 Yes

7 Yes

34 No

43 No

6 Yes

44 No

Evaluation

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 may have used past knowledge of car accidents to make decisions on broken glass (schema)

Study can lack ecological validity and therefore may be difficult to generalize findings

Question

Goal

Resolution

Why was the victim so certain that Ronald Cotton was her rapist?

To have a better understanding of why this happened

Important Details

Jennifer Thompson, 22 year old college student, was raped by Bobby Poole on July 28, 1984

Jennifer made a deliberate effort to study his physical characteristics

She survived, and reported the incident. During the investigation, a composite sketch was made

Ronald Cotton was given as a tip. He also worked nearby and had a criminal record

Given photos of suspects, Jennifer confirmed Ronald Cotton was the rapist with certainty

Even after a physical lineup, Jennifer was still sure it was Ronald Cotton

Apparently, Ronald Cotton looks extremely similar to Bobby Poole, who admitted to his crimes in prison

DNA evidence freed Ronald Cotton

During the photos and lineup, they all had different clothing

Follow-up Notes

Research shows memory is highly malleable, and witnesses who begin with uncertainty become more certain over time

Officer was present during the identification, and could've subconsciously provided information

Jennifer's confidence was influenced by the feedback from her choice in the lineup.

Repeating only one individual in multiple procedures or lineups increases witness confidence

Witnesses are more likely to pick someone in clothes similar to those worn by the culprit than physical characteristics, therefore, they should all be wearing the same clothing

All members of the line-up should match the suspect description. In addition, witnesses should be told the suspect may or may not be in the line-up

When gathering evidence from a witness, researchers use a narrative interview style called a Cognitive Interview

Culter & Penrod advocate sequential line-ups. Accuracy of identification increases when suspects are seen one-by-one, and identification is made (yes/no) after each person is presented. Witnesses should not be given feedback that confirms their identification

A narrative interview is an interview that asks simple questions (“Could you tell me what you remember about the night?”). The interviewee does most of the talking, with very few questions except for clarification. This way, interviewer does not alter schema and distort memory by asking leading questions

The cognitive interview begins with context reinstatement. We have better recall when we are in the same place, emotional state, and/or same context in which memory was encoded

This is based on Tulving & Thomson Encoding Specificity Hypothesis (1973). Before asking them to recount, the police would have the interviewee think about where they were and how they felt at the time.

Cognitive interview often uses the following strategies:

Change perspective:

Involves asking the person to “think outside of their schema” (i.e what do you think that the bank teller saw?)

Change the order:

Breaks down the role of schema in “filling in” information. Researchers found that more information is obtained if the witness is asked to recall events forward and backward than simply retelling the story