Final Flashcards
Episodic Memories
Personally experienced events
Leading cause of wrongful conviction
Eye witness misidentification (70%)
4 stages of memory processing
Event
Encoding/Acquistion
Storage/Retention
Retrieval
Constructivist Approach
People with different values and experiences will experience events differently
Bottom up processing
Data driven. Infomation transmitted to higher levels of visual system until it becomes a unified perception
Top own processing
Sensory information is interpreted in light of prior knowledge and expectations
Perceptual set
Use past experiences and environmental context to percieve stimulus in a certain way
Schema
Mental framework that helps us make sense of familiar situations
Script Theory
Common schema for events. Remember things better when they fit with schemas and previous experience
Ebbinghaus forgetting curve
Inverse relationship between memory retention and time interval–> exponential decrease
Encoding specificity
Retrieval depends on similarity to original encoding conditions
When does retrieval failure occur? (2)
Memory trace stored in memory but can no longer be accessed
Memory trace no longer stored in memory
Which is better, recall or recognition? Why?
Recognition–> stimuli provides more relevant cues for retrieval
Confirmatory Bias
Holding preconceived beliefs and focus only on details that fit with those beliefs
4 strategies used in a police cognitive interview
Mental context reinstatement
Report everything
Reverse order
Change perspective
Fischer/Gieselman Enhanced cognitive interview
Use knowledge of memory, social dynamics and communication to aid in memory retreival
Effect of enhanced cognitive interview
47% more correct info, no difference in amount of incorrect info
Schacter’s 7 sins of memory
Transience Absent mindedness Blocking Misattribution Suggestibility Bias Persistance
Transience
Memory only lasting a short time. Info has not been encoded or stored
3 components of working memory
Visuospatial sketchpad– visual semantics
Phonological loop– language
Episodic buffer– long term memory
Phonological similarity effect
Harder to remember things that sound the same
Unattended speech effect
Background noise interferes with encoding of relevant information
Patient HM
Damaged hippocampus prevented him from retaining any new memories for more than a few seconds
Hippocampus
Involved in transition from short to long term memory
Where are memories stored?
Cortex
Deep processing
Reducing transience by extracting meaning from the information–> old people using acting techniques
Who reports the most absent-mindedness? Why?
Old people–> Less capacity to direct attention of information at hand so information is not encoded properly
Blocking
Temporary inaccessibility of required information– Tip of tongue. Info is encoded, stored but only partially available for retrieval
Misattribution
Memories attributed to the wrong source–> OKC bombing accomplice
Illusory memory
Not actually encountered but semantically related to previous items
Loftus misattribution
Told people they got sick after eating strawberry ice cream, 20% believed it and avoided it
Suggestibility
Incorporation of external information into personal recollection
Persistance
Unable to prevent collection of unwanted memories. Governed by emotion and amygdala plays a big role
Children and free recall
Accurate but limited free recall. Distressed children are more accurate. 41% mis ID nurse
Children’s accuracy in open and closed questions
Open–> 91%
Closed–> 45%
Hughes/Grieves Non sensical questions
Sensible but unanswerable–> 25% initially say idk but offer an answer when asked again
Waterman
Almost all children answer closed, non-sensical questions. 95% said idk to open non-sensical
Poole/White repeated questioning
Open–> Very accurate, even if repeated
Closed–> young children likely to change responses both within and across interviews when repeated
3 types of suggestibility in children
Interviewer suggestion
Misattribution
Autosuggestion (reading)
Thompson neutral/bias interviewer
Neutral–> Accurate, only errors of ommission
Bias–> Errors of commission and continued believing false info 2 weeks later
Bruck
Kids interviewed 1 year after doctors visit. Reported both misleading suggestions and non-suggested inaccuracies. Rate of false info rises with every repeated, suggestive interview
Salmon/Pipe
New information given by child after initial free recall is likely to be innaccurate
2 explanations for suggestibility
Original memory is unchanged but irretrievable
Gap filling strategy when memory is incomplete
Vacant slot hypothesis
Memory was weakly encoded so auggested information is placed in vacant slot
Free recall accuracy in children without suggetsibility
90%
Co-existance hypothesis
Accurate and non-accurate memory are recoverable but false memory is the most recent
Demand characteristics
Social compliance–> false memory is the one required by interviewer
Substitution hypothesis
Post event info replaces or distorts original memory
Source monitoring hypothesis
Representations of event exist but child can not identify the source
Leaner and sex abuse
Later interviews had 2x more sexual details and less denial an avoidance. 2-3 interviews may be needed for child to give full report
Goodman/ Ruby
Dressed kid up in clown costume as another watched. Few differences in accuracy between participant and witness
Configuration
Relationship between facial features–> thatcher effect
5 influences of facial recognition
Distinctiveness Familiarity Disguise Lighting Length of exposure
Good facial recognition
Females have slight advantage
Age has no effect
Highly anxious make fewer mistakes
Better ID when the culprit is present in line up
Other effect
Better identification of your own race