RE: Important sampling question

Thank you John and EA
I will try and write up something on it as a summary

All the best

Lisa Seeman

LinkedIn, Twitter

---- On Thu, 01 Aug 2019 17:06:17 +0300 wrote ----

Hi Lisa and All,


Apologies to E.A. if her info already includes sample-size power calculation.




John Rochford
University of Massachusetts Medical School

Eunice Kennedy Shriver Center
Director, INDEX Program
Faculty, Family Medicine & Community Health



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From: EA Draffan <>
Sent: Thursday, August 1, 2019 4:00 AM
To:; public-cognitive-a11y-tf <>
Subject: RE: Important sampling question


This is a much debated subject within the research world!  It depends on so many variables as well as whether it quantitative or qualitative research etc. so all I have done is to search for some easy to reach pages on the subject.  But I have attached a paper that might help if you cannot decide on specific numbers and need to change your ideas as the research gets underway!



Best wishes



Mrs E.A. Draffan

WAIS, ECS , University of Southampton

Mobile +44 (0)7976 289103



From: lisa.seeman []
Sent: 01 August 2019 06:49
To: public-cognitive-a11y-tf <>
Subject: Important sampling question


Hi Folks


I was asked an important question about sampling. Does anyone know what sample size and make up a good sample needs to have when testing for usability for people with cognitive and learning disabilities?


What do people normally do?


Are there any research papers on this? What has been found to be reliable and



All the best
Lisa Seeman

LinkedIn, Twitter




Received on Thursday, 1 August 2019 21:34:22 UTC