I don't think that it's possible to really know. I've never had a potential employer tell me why they chose not to hire me. That said, I don't think they've had

I don't think that it's possible to really know. I've never had a potential employer tell me why they chose not to hire me. That said, I don't think they've had a significant impact. But I don't leave time unaccounted for, either. I include the gap times in my resume by explaining what I have done during them that would relate to the position (hobby projects, volunteering, etc.) My resume is a report of my experience, but that doesn't have to be limited to experience that I've been paid for.