On Mar 12, 2009, at 9:52 AM, Jared Spool wrote:
The key question is: How do you know that people older than 65 will behave differently than people younger than 65?
My thoughts exactly. I don't see how you would know this until you've actually done some research and testing on it. If you know that your audience doesn't really have people over 65, then there's no reason to recruit them. If you know you do, then you should recruit them, even if it's a small number "somewhat" proportionate to the percentage that 65 and over make up in your group.
I say somewhat, because if you recruit 20 participants and 65 and over only represent 2% of your population, you'd recruit less than 1 participant. In a case like this, we'd typically recruit 2-3 so we'd have enough to see if there's a significant difference that would warrant additional research on that smaller group.
Cheers! Todd Zaki Warfel Principal Design Researcher Messagefirst | Designing Information. Beautifully. ---------------------------------- Contact Info Voice: (215) 825-7423 Email: [email protected] AIM: [email protected] Blog: http://toddwarfel.com Twitter: zakiwarfel ---------------------------------- In theory, theory and practice are the same. In practice, they are not. ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... [email protected] Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help
