In the framework of IRT, let θ be the latent trait (focused aspect of quality of life) with normal distributions N μIRT1, σIRT) and N μIRT2, σIRT) in the first and second group, respectively.
"They both require perfectly good soldier traits: focus, discipline and making sure you go out there and get the job done.
After observing scores of managers for many years, we came to the conclusion that managers who take effective action (those who make difficult even seemingly impossible things happen) rely on a combination of two traits: focus and energy.
Our discrete-trait focus prevails across the range of analytical scales from characteristics of individual artifacts (e.g., Buchanan and Collard 2007; O'Brien and Lyman 2003) to entire cultures (e.g., Bettinger 2009; Chatters and Prentiss 2005).
To me all three share two similar traits: focus and persistence.
Conventional methods for studying the genetic architecture of complex traits focus on the level of those traits.
Traits Focused, serious, handsome, single-minded.
This mechanism of "kin selection" can explain how worker bees evolved such apparently 'selfless' traits, focused on aiding the queen's survival and reproduction.
Now, testing the fifth and sixth generation of the birds, Jensen and his colleagues have looked more deeply into these traits, focusing on metabolism, feeding efficiency, and body chemicals involved in boldness.
This could explain how worker sterility evolved, as traits focused on helping the queen took precedence over personal reproduction, and it explains how even suicidal behavior could have been selected for as propagating the genes that cause it (Dawkins 1989, 174 75).
