I've designed 2 questionnaires to be distributed to people with Dyslexic and Dyspraxia. A person I know who runs a support group for people with Dyslexia has contacted members and some have answered it.
The questionnaire on Dyspraxia is distributed the same way by another person.
What type of sampling is this?
either convenience or snowball sampling. See this link
http://www.statpac.com/surveys/sampling....
Reply:Random sampling. You know nothing about the people you have selected, apart from their disease, and you haven't controlled the number of people who have answered your questionnaire.
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