Define Expertise - I

It is tempting to use time and frequencies as a measure of expertise. While these are measures of experience, they do not always describe expertise. For example, in one study Dana ran, she looked for people with a range of experience using the web. The original screening criteria looked at the average amount of time spent on the web over a week and how long the participant bad been using the web overall. Though Dana expected that someone who had been using the web for a few years for 60 hours per week would be an expert web user, this was not the case. One notable participant did nothing on the web but play four specific games, getting to each from shortcut icons set up for her by her grandson. She didn't know how to use a web browser at all.