Older adults have better implicit memory

April, 2011

A new study further confirms the idea that a growing inability to ignore irrelevancies is behind age-related cognitive decline.

A study involving 125 younger (average age 19) and older (average age 69) adults has revealed that while younger adults showed better explicit learning, older adults were better at implicit learning. Implicit memory is our unconscious memory, which influences behavior without our awareness.

In the study, participants pressed buttons in response to the colors of words and random letter strings — only the colors were relevant, not the words themselves. They then completed word fragments. In one condition, they were told to use words from the earlier color task to complete the fragments (a test of explicit memory); in the other, this task wasn’t mentioned (a test of implicit memory).

Older adults showed better implicit than explicit memory and better implicit memory than the younger, while the reverse was true for the younger adults. However, on a further test which required younger participants to engage in a number task simultaneously with the color task, younger adults behaved like older ones.

The findings indicate that shallower and less focused processing goes on during multitasking, and (but not inevitably!) with age. The fact that younger adults behaved like older ones when distracted points to the problem, for which we now have quite a body of evidence: with age, we tend to become more easily distracted.

Recent posts at Mynd

A study involving 97 healthy older adults (65-89) has found that those with the “Alzheimer’s gene” (APOe4) who didn’t...

An Indian study involving 648 dementia patients, of whom 391 were bilingual, has found that, overall, bilingual patients developed dementia 4.5...

A study, involving 371 patients with mild cognitive impairment...

A study involving 206 spousal and adult children caregivers of dementia sufferers (mostly Alzheimer’s) has found that about 84% of...

A study involving 254 people with dementia living at home has found that 99% of people with dementia and 97% of their caregivers had one or more...

A new U.S. study suggests that Alzheimer's disease and other dementias are markedly under-reported on death certificates and medical records....

It’s often argued that telling people that they carry genes increasing their risk of Alzheimer’s will simply upset them to no purpose...

11 new genetic susceptibility factors for Alzheimer’s identified

The largest international study ever conducted on Alzheimer's...

Understanding a protein's role in familial Alzheimer's...

A brain imaging study of 162 healthy babies (2-25 months) has found that those who carried the ApoE4...

A gene linked to Alzheimer's has been linked to brain changes in childhood. This gene, SORL1, has two connections to Alzheimer’s: it...

Analysis of data from 237 patients with mild cognitive impairment...

Two studies indicate that young people carrying the “Alzheimer’s gene” (ApoE4...

Analysis of data from more than 8,000 people, most of them older than 60, has revealed that, among the 5,000 people initially tested cognitively...

Analysis of 700 subjects from the Alzheimer's Disease Neuroimaging Initiative has revealed a genetic mutation (rs4728029) that’s associated...

Analysis of brain scans and cognitive scores of 64 older adults from the NIA's Baltimore Longitudinal Study of Aging (average age 76) has found...