Executive control in long-term abstinent alcoholics with mild to borderline intellectual disability: the relationship with IQ and severity of alcohol use-related problems.
Past alcohol use does not add extra working-memory harm in sober adults with mild ID, so target memory supports, not the drinking history.
01Research in Context
What this study did
van Duijvenbode et al. (2013) looked at adults with mild to borderline intellectual disability who had stayed sober for years.
They wanted to know if past heavy drinking still hurt three brain skills: working memory, stopping impulses, and waiting for rewards.
The team gave simple paper-and-computer tests to two groups: adults who once drank heavily and adults who drank lightly.
What they found
Only working memory was weaker in both heavy and light drinkers.
Stopping impulses and waiting for rewards looked the same no matter how much they had drunk.
Having both ID and alcohol history did not add extra damage.
How this fits with other research
Danielsson et al. (2010) first showed that adults with ID already have weaker working memory. Neomi’s team adds that long-past alcohol use does not make that worse.
Van der Molen et al. (2010) proved that teens with mild ID can boost working memory with short computer games. This gives hope that the same games might help the adults Neomi studied.
Danielsson et al. (2012) saw mixed skills in kids with ID: weak planning but okay word fluency. Neomi’s adults show the same mixed picture, so the pattern seems lifelong.
Why it matters
You can stop blaming old drinking for every memory slip. Focus your teaching plans on working memory supports like shorter instructions, visual cues, or the same computer drills that help teens. Skip extra stigma about past alcohol use.
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02At a glance
03Original abstract
Deficits in executive control might be related to alcohol abuse in individuals with mild to borderline intellectual disability (MBID). The goal of the present study was to test the relationship between executive control (i.e., working memory capacity, inhibitory control and delay discounting), IQ and chronic alcohol use. Participants (N=40) were divided into four groups based on IQ and severity of alcohol use-related problems (heavy and light drinkers with and without MBID). They were all admitted to a psychiatric treatment facility and long-term abstinent at the time of testing. Contrary to the expectations, executive control was not consistently impaired among individuals with MBID. Results showed that working memory capacity did seem to be impaired, whereas inhibitory control and delay discounting did not. Moreover, there were no differences between heavy and light drinkers on any of the parameters and having a dual diagnosis (heavy drinkers with MBID) did not result in additive negative effects on executive control. It is suggested that alcohol-related cognitive impairment is temporary and decreases over time after cessation of drinking.
Research in developmental disabilities, 2013 · doi:10.1016/j.ridd.2013.07.003