Enhanced: Separating the Wheat from the Chaff
نویسندگان
چکیده
Seeing the world around you is like drinking from a firehose. The flood of information that enters the eyes could easily overwhelm the capacity of the visual system. To solve this problem, a mechanism-attention-allows selective processing of the information relevant to current goals. As the eminent physiological psychologist Helmholtz [HN2], [HN3], [HN4] noted over a hundred years ago, even without moving our eyes we can focus our attention on different objects at will, resulting in very different perceptual experiences of the same visual input (1). Visual attention has been the focus of several decades of elegant behavioral research, but the neural basis of this process has come under intensive investigation only recently [HN5], [HN6], [HN7]. A report by Kastner et al. on page 108 (2), in which the authors used functional magnetic resonance imaging (MRI) of the brain in awake human subjects performing visual tasks, provides new clues about how our brains deal with the onslaught of sensory input. Try a version of Helmholtz's experiment for yourself. Fix your eyes on the cross at the center of the figure (below), and without moving your eyes read the letters around the circle one letter at a time, starting at the top. Attention enhances your awareness of the selected letter, relegating the rest to the margins of consciousness.
منابع مشابه
Estimating excess length of stay due to central line-associated bloodstream infection: separating the wheat from the chaff.
متن کامل
Separating Wheat from the Chaff - A Relationship Ranking Algorithm
We address the problem of ranking relationships in an automatically constructed knowledge graph. We propose a probabilistic ranking mechanism that utilizes entity popularity, entity affinity, and support from text corpora for the relationships. Results obtained from preliminary experiments on a standard dataset are encouraging and show that our proposed ranking mechanism can find more informati...
متن کاملSeparating wheat from chaff: examining the obesity paradox in the critically ill
Obesity is an increasing burden globally. In the general population, the obese have an increased mortality risk. Regarding the critically ill, a growing body of literature supports the obesity paradox, the notion that obesity confers a protective effect in certain disease states. However, the paucity of methodologically sound trials prevents definitive interpretation and may obscure risks.
متن کاملBeta-adenosine, a bioactive compound in grass chaff stimulating mushroom production.
Fructification and yield of the edible mushrooms Pleurotus pulmonarius and Stropharia rugosoannulata are clearly enhanced when wheat straw is supplemented with 30% Lolium perenne grass chaff. The bioactive compound in the methanol extract of grass chaff was identified as beta-adenosine. In vitro biological activity tests showed that 0.012 mg of beta-adenosine per ml of medium stimulated earlier...
متن کامل