And I also suspect that it may apply to subgroups of people with Attention Deficit Disorder
It seems the case, the study that comes to mind is Executive Function Impairments in
High IQ Adults With ADHD by Brown, Reichel & Quinlan.
People with ADHD were much more likely to have Working Memory Index and Processing Speed Index (WMI & PSI) scores two standard deviations below their Verbal Comprehension Index or Perceptual Organisational Index (VCI & POI). As a side note, VCI is considered the best indicator of premorbid IQ.
I’ve actually been meaning to ask this for a while, can you (assuming this study is accurate) use Bayes theorem to argue that where VCI/POI>WMI/PSI is two standard deviations out, ADHD is a possibility worth considering? (and the numerical value of that possibility if I’m being ambitious?)
DOI: 10.1177/1087054708326113 for those interested.
My Bayes’ is not very strong, so forgive me. This is about as naive as it gets.
Prior for adult ADHD is about 4%.
For working memory:
2SD difference given ADHD is 35%, and for the rest of the population it’s 2.4%. I’ll use LWM to represent a significantly lower working memory.
This suggests an overall population of 3.7% having a 2SD difference, since 4% x 35% + 96% x 2.4% = 3.7%
So P(ADHD | LWM) = 35% x 4% / 3.7% = 37.8%
For processing speed:
2SD difference given ADHD is 44.9%, and for the rest of the population it’s 8.7%. I’ll use LPS to represent a significantly lower processing speed
This suggests and overall population of 10.1% having a 2SD difference, since 44.9% x 4% + 8.7% x 96% = 10.1%
so P(ADHD | LPS) = 44.9% x 4% / 10.1% = 17.8%
Each of those increase the odds of ADHD significantly above the population baseline, and if you’re experiencing ADHD symptoms in conjunction with results like that, it’s probably worth seeing a psychiatrist.
Thanks for taking the time to math that out :)
I have seen a few psychiatrists in the past 5 years and unfortunately medication wasn’t an option. I do think I’m performing better with age however!
It seems the case, the study that comes to mind is Executive Function Impairments in High IQ Adults With ADHD by Brown, Reichel & Quinlan. People with ADHD were much more likely to have Working Memory Index and Processing Speed Index (WMI & PSI) scores two standard deviations below their Verbal Comprehension Index or Perceptual Organisational Index (VCI & POI). As a side note, VCI is considered the best indicator of premorbid IQ.
I’ve actually been meaning to ask this for a while, can you (assuming this study is accurate) use Bayes theorem to argue that where VCI/POI>WMI/PSI is two standard deviations out, ADHD is a possibility worth considering? (and the numerical value of that possibility if I’m being ambitious?)
DOI: 10.1177/1087054708326113 for those interested.
My Bayes’ is not very strong, so forgive me. This is about as naive as it gets.
Prior for adult ADHD is about 4%.
For working memory:
2SD difference given ADHD is 35%, and for the rest of the population it’s 2.4%. I’ll use LWM to represent a significantly lower working memory.
This suggests an overall population of 3.7% having a 2SD difference, since 4% x 35% + 96% x 2.4% = 3.7%
So P(ADHD | LWM) = 35% x 4% / 3.7% = 37.8%
For processing speed:
2SD difference given ADHD is 44.9%, and for the rest of the population it’s 8.7%. I’ll use LPS to represent a significantly lower processing speed
This suggests and overall population of 10.1% having a 2SD difference, since 44.9% x 4% + 8.7% x 96% = 10.1%
so P(ADHD | LPS) = 44.9% x 4% / 10.1% = 17.8%
Each of those increase the odds of ADHD significantly above the population baseline, and if you’re experiencing ADHD symptoms in conjunction with results like that, it’s probably worth seeing a psychiatrist.
Thanks for taking the time to math that out :) I have seen a few psychiatrists in the past 5 years and unfortunately medication wasn’t an option. I do think I’m performing better with age however!