Word: task
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...This is higher-order learning, and it takes multiple trials to learn," explains Sheryl Smith, a professor of physiology and pharmacology at Downstate. Prepubescent mice mastered the task quickly. Postpubescent mice also did quite well. But mice in the throes of puberty, which occurs at age 5 weeks, couldn't seem to get it through their furry little heads...
...picture, drawing evidence from that research-friendly fellow mammal, the mouse. The authors, a team from State University of New York Downstate Medical Center, wanted to look at whether the ability to learn is affected by changes in brain chemistry that occur at puberty. They devised a task that was relatively complex (at least for a mouse) and required learning how to avoid a moving platform that delivered a very mild shock. (See the top 10 animal stories...
...certainly sense their remoteness from the travails of a place like Langa, where overcrowding is appalling. The tour group is shown three families sharing a single bedroom in an old workers' hostel, and somehow achieving the impossible task of keeping it clean and tidy. "There is no privacy," Mtinini says, "but people don't die lonely here...
...foundations are making investments to augment the capacity of government," says Bruce Katz, founding director of the Metropolitan Policy Program at Brookings. "They're pooling funds to take on a monumental task, which is, How do you begin to change the trajectory of an entire metropolitan economy...
With so many foreign powers playing politics in Iraq, the future of the nation will depend on the skill, maturity and willingness of its leaders to compromise. Plenty don't think they are up to the task. "They are going to push us back to civil war," says Daha Arwai, the head of a charity that looks after the children and widows of men murdered by militias. Will Iraq's leaders prove her wrong? Joe Biden is convinced they will - but then, the Vice President is one of life's sunny optimists. Most others, watching Iraq, have their fingers very...