Memory and time: Backward and forward telescoping in Alzheimer's disease

Area of Science:

• Cognitive Psychology
• Neuroscience
• Gerontology

Background:

• Timing biases, specifically backward and forward telescoping, affect event date recall.
• Backward telescoping involves misattributing events to earlier dates, while forward telescoping misattributes them to later dates.
• These biases are relevant in understanding memory deficits in aging and neurodegenerative diseases like Alzheimer's Disease (AD).

Purpose of the Study:

• To investigate backward and forward telescoping biases in individuals with AD and healthy older adults.
• To examine the relationship between timing biases and context memory recall.
• To explore the neurological underpinnings of these memory phenomena in AD.

Main Methods:

• Participants included individuals with AD and healthy older adults, matched for age, sex, and education.
• Event recall task: Participants recalled the years of five recent and five remote public events.
• Cognitive assessment: Included a context memory task assessing association of letters and locations.

Main Results:

• Both AD participants and healthy older adults exhibited backward telescoping for recent events and forward telescoping for remote events.
• Individuals with AD and older adults showing backward telescoping had poorer context recall compared to those with forward telescoping.
• A significant association was found between the degree of context information recalled and the direction of the timing bias.

Conclusions:

• The direction of temporal memory bias is linked to the quantity of contextual information retrieved.
• Backward telescoping may indicate difficulties in recalling event context, potentially related to hippocampal function and retrograde amnesia in AD.
• These findings highlight the role of contextual memory deficits in shaping temporal recall errors in Alzheimer's Disease.