Autobiographical memory (AM)
Memory for specific experiences from our life, which can include both episodic and semantic components
Sensory component of AM
Greenberg and Rubin
Two ways of visually remembering an event
2. Third person perspective
Planning for future also involves _____
Episodic memory (can simulate future events)
Participants are asked to describe a future event from their own point of view or in third person
Results in same brain area activation as past events
Cabeza and coworkers
Compared brain activation caused by autobiographical memory and laboratory memory
Participants viewed:
Cabeza and coworkers experimental results
Both types of photos activated similar brain structures:
A-photos activated more of the:
Demonstrates the richness of autobiographical memories
What events are remembered well?
Reminiscence bump
Participants over the age of 40 are asked to describe an event to a neutral cue word
Memory is high for recent events (retention) and for events that occurred between 10-30 years of age (reminiscence)
Memory poor under age 10 (childhood amnesia)
Hypotheses about the reminiscence bump
Self image hypothesis
Cognitive hypothesis
Cultural life script hypothesis
Each person has:
Personal events are easier to recall when they fit the cultural life script
Results of Koppel and Bernsten’s “youth bias” experiment
Participants were asked to indicate how old a hypothetical person would be when the event that they consider to be the most important public event of their life time takes place (ages 10-30)
The distribution of responses are similar for both younger and older participants
Memory for emotional stimuli
Emotional events are remembered more easily and vividly
Emotion improves memory, becomes greater with time (may enhance consolidation)
Brain activity: amygdala
Review experiment where emotional pictures are remembered better than neutral words, even after 1 year
Results for emotional/neutral picture experiment
Recall for emotional pictures is better than for neutral pictures when subjects are exposed to stress during encoding (cortisol increases consolidation)
-arms in cold water versus arms in warm
There is no significance difference between emotional and neutral recall in the no stress condition. This result may be related to enhanced memory consolidation for the emotional picture.
Flashbulb memories
Memory for circumstances surrounding shocking, highly charged important events
Are flashbulb memories photograph memories
No they can change with the passage of time as demonstrated by repeated recall:
Initial description: baseline
Later reports: compare to baseline
Neisser and Harsch
Participants filled out questionnaires within a day after the explosion of Challenger and then filled out the same questionnaire 2.5-3 years later
People changed where and how they knew the events
Results were inaccurate or lacking in detail, even though people reported them to be very vivid and confident
Flashbulb memories are just like
Everyday memories (details decay for flashbulb memories but vividness and confidence stay high)
Rimmele and coworkers
Memories for negative emotional pictures were stronger and associated with greater confidence
But worse for colour context memory
Demonstrates dissociation between confidence of peoples self report and their memory (or between subjective report and objective measurements)
Narrative rehearsal hypothesis
The constructive nature of memory
Memory=what actually happens + person’s knowledge, experiences, and expectations
The constructive nature of memory experiment
Bartletts “war of ghosts” experiment
Results
Source memory
Process of determining origins of our memories