calibrating здесь - прилагательное, а не деепричастие:
"People with calibrating boredom find that their thoughts wander and they want do something that differs from what they’re currently doing. But they’re not exactly sure what or how they might go about it. This state occurs when people perform repetitive tasks and want to reduce this boredom, but generally seem unsure of what to do."
http://mentalfloss.com/article/54074/there-are-5-types-boredom
https://www.google.co.uk/search?q=calibrating+boredom