"heightened alertness" is a correct and usable phrase in written English.
It is generally used to describe a heightened state of awareness and alertness, such as when one is expecting an important event or situation. For example: "The company was on heightened alertness during the merger negotiations."
These data demonstrate obese children's heightened alertness to food related cues.
The mechanisms underpinning heightened alertness are unclear; however, such increases may be linked to greater cerebral activity following the chewing of gum (Fang Li, Lu, Gong, & Yew, 2005).
Most of the research has focused on easily observed phenomena like alpha and beta waves, which have been respectively linked to activities including sleep and heightened alertness.
The flurry of concern may be to the good, says Selker, because it has heightened alertness: "We are absolutely better off than we have been, for a lot of reasons.
This overwhelmingly inventive whirl wrenches viewers out of the realm of the ordinary and into a state of stunned consciousness and heightened alertness, into a world that's both recognizable and like no other.
The spectators who had not yet learned to gauge how late they could be without forfeiting a desirable seat, and who regretted their punctuality, watched them closely for signs of heightened alertness.
Instead, Harford shows why embracing disorder can heighten alertness and help us build new connections between disparate ideas, thereby increasing our ability to problem-solve, innovate, and become more resilient.
Caffeine is a drug that can heighten alertness, but coffee drinking is a social practice outside the biomedical sphere.
The formula also contains L-theanine, a therapeutic ingredient found in tea known to promote tranquility, improve cognition and heighten alertness.
More than once I found myself responding to the narrator's heightened physical alertness with my own, just staring at that thing that is the back of my hand with interest and something like surprise.
For example consider opportunity discovery wherein individuals develop heightened awareness ("alertness") of arbitrage situations for profit making (Kirzner, 1979; Sarasvathy et al. 2005).
