Google authorship program-sometimes it works..and sometimes ...
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sometimes my picture shows up in search results and sometimes it doesn't. I find it depends who's computer I search. Is there a way to make it show up all the time for search results? Also, what determines if your picture shows up besides the article itself or just on the right in a general box showing your google+ profile?
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What you are likely experiencing is the effects of personalized search results. That is, results when you are signed into Google (hence the differing results on different computers).
First you need to check that you have correctly implemented the authorship markup here:
http://www.google.com/webmasters/tools/richsnippets
Remember, there is no guarantee that a rich snippet will be shown in search results. If you need help implementing the markup then there are several guides you can find through Google.
Hope this helps,
Adam.