Generally, a person becomes an expert through a process of learning and then perfecting a technique through practice. In any particular area of achievement, there are many techniques that have to be learned, either through direct instruction or by watching others perform them. Once those techniques are learned, they must be practiced. Becoming an expert at all of the techniques, which can be rolled into a skill, requires a large amount of deliberate practice, practice where feedback and progress is carefully monitored. In general, 10,000 hours of deliberate practice is needed to become an expert, but there are levels of expertise that can be developed in less time.
Accidents: Every so often someone gets smacked in the head REALLY hard and from their injury we learn about the brain. The most famous case occurred in 1848 to a fellow named Phineas Gage. Phineas was working on the railroad when an iron pole shot through his head.
Lesions: A lesion is the removal or destruction of part of the brain. Doctors will lesion a patients brain during brain surgery. By removing parts of the brain we are able to learn what different parts of the brain do.
Answer:
Vera age 70 has isolated systolic hypertension calcium channel blocker dosages for her should be started at about half the usual dose.
The theory, methods, and practice of testing a hypothesis by comparing it with the null hypothesis. The null hypothesis is only rejected if its probability falls below a predetermined significance level, in which case the hypothesis being tested is said to have that level of significance.
