Why are eyewitness memory
errors so prevalent? What are
the common sources of errors?
Errors associated with
perception and attention, Misidentifications due to
familiarity, contamination due to
suggestion & repeated retelling
In what ways has cognitive
Psychology contributed to
making eyewitness testimony
more effective?
Developing guidelines for preserving
eyewitness memory and the cognitive interview technique to effectively
elicit more information from eyewitnesses
What are the key ingredients
for “implanting” false memories?
trust, real memory, indicate false memory, and add in detail, imagine what happened, social pressure, leading question, marinate over time
The weapon focus effect
The tendency to focus on a weapon can result in a narrowing of attention, often due to strong emotional reactions
source confusion
a vague sense of familiarity (without conscious recollection)
can lead to misidentification
suggestion
can lead to elaborate false memories: The misinformation effect: information can contaminate
your memory of the original event
The cognitive interview technique
effective in eliciting more information from eyewitnesses:
1. Mental (or physical) reinstatement of the crime environment
2. Encouraging the reporting of every detail (
3. Describing the incident in several different orders
4. Reporting the incident from different viewpoints
Ross et al.’s (1994) study on the effect of familiarity on identification errors
male vs female teacher reading to students, female teacher gets robbed, identify the criminal
Loftus’s “lost in the mall” study
Subjects were told in an interview
that when young, they were lost at a
mall, A week later, ~25% of college
students “recall” details of the event
that never took place
Wade et al.’s (2002) “false photograph” study 2
Participants were exposed to “fake” photographs and asked about their “fake” childhood experience. Participants were interviewed three times about these events
What are the commonly used
metaphors of memory? Why are
they problematic?
camera, video recorder - memory is reconstructive
What does it mean for
memory to be “reconstructive”?
constantly operating, so it is easy to
implant false memories - changing based on external inputs
What evidence supports the
assertion that memory is
reconstructive in nature?
Word recall demo, Sentence recall demo, Recall of visual scenes - we change memory over time based on events
What are the major sources of
false memories?
Automatic activation of related concepts, Schemas & scripts, Confusion with similar events, Subsequent misleading events, and
information
indexing/binding function of the hippocampus
relevant memory
representations for an
event (e.g., visual,
auditory, emotional
experiences)
semantic priming
Related concepts are automatically activated and become temporarily more accessible
schemas & scripts
Your knowledge of objects that are typically present, Your knowledge of the sequence of events that usually take place
misinformation effect
Misleading postevent information
(MPI), including seemingly minor
wording changes, can affect later
recall
Word and sentence recall demos
Lure” words (e.g., “sleep”) were strongly activated, Semantically similar concepts can also intrude into your memory
The “picnic scene” memory demo
Describe the scene in detail after viewing it, which tests their ability to encode and retrieve visual and semantic information
Reconstructive memory
Both our semantic knowledge and episodic memories can contribute to this process
What are the major reasons for
forgetting in LTM?
Insufficient initial encoding, Memory decay, Interference, and the lack of effective retrieval cues
What is memory consolidation?
What role does sleep play in
consolidation?
Slower forgetting when sleeping
occurs after learning, Longer and more severe sleep deprivation
leads to a higher incidence of
attentional lapses
What are the differences between
anterograde and retrograde amnesia?
Retrograde amnesia: Often a temporary result of injury, Loss of episodic memory for previous events
Anterograde amnesia: Typically permanent, Consolidation of new
personally experienced memories