New research suggests that productivity could be linked to those who are "up with the lark", while those who define themselves as "evening people" are likely to be less proactive in the workplace.
The research, which surveyed 367 student participants, found a correlation between their self-reported 'morningness' (measured by their answers to questions about how easy they find it to get up in the morning and how alert they feel) and their self-reported proactivity (measure by their agreement to the questions), was statistically significant.
I know that I'm usually able to spring out of bed @ 5am to work, but I wonder if that includes people who are rousted out of bed @ 5:30 by children (the wife). And I wonder if there's a crabbiness study on those same people. I have some data they could include in their research.