Millions of copies of console and computer- based" brain trainers" are sold worldwide every year, claiming to make peoples’brains younger, better, faster or bigger. The theory seems to make sense: regularly exercising the brain with tests and puzzles can improve brain skills and help people become better at everyday thinking tasks.
But recent research suggests scientific evidence is lacking.
The BBC’s Brain Test Britain experiment wants to find out if brain training really works, and is aiming to get thousands of members of the public to train for 10 minutes a day ,three times a week ,for at least six weeks.
Scientific experiments and their findings should be evaluated by independent experts in a process called "peer review". This is the minimum standard by which the quality of any research is judged.
Very little research on commercial brain trainers has been peer reviewed.
Instead, manufacturers often quote unsupported testimonials from" satisfied users". None of these are acceptable substitutes for peer review.
A proper" control group" is the backbone of any valid scientific study.
With a brain training study, the control group of participants should do the same amount of a mental activity as the brain - training group, but using a" non - brain training" activity such as a crossword.
Scientists should then be able to compare the results from the two groups to see how genuinely effective the brain training tasks were.
Studies that have been used to support the claims made by commercial brain trainers often have no control group at all, or a control group that is not as mentally active as the trained group.
In order to see how much you have improved, you need to know where you were at the start. To do this. scientists use a" benchmarking test"—the same test, taken at the beginning and end of an experiment.
Benchmarking tests should he different from the brain training tasks. This way, scientists can see if the effects of brain training are transferable to other mental tasks.
Studies used to support the claims made by commercial brain trainers often use tests for benchmarking that are identical—or very similar—-to the tests used during training
What description is right about BBC’s Brain Test Britain experiment

A:This experiment is to examine the quality of the brain training products sold. in market. B:This experiment is to help BBC to develop a new brain training product. C:The people taking part in this experiment should do brain training ten minutes every day. D:For a peon taking part in this experiment, the training period lasts at least for six weeks.

Direction: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. Choose the ONE answer that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre. Dogs are often 21 man’s best friend. For those who are blind, a dog is 22 than a friendly company. A dog is a pair of sharp eyes. A 23 dog guide gives blind people the 24 to move through the world safely and freely. A dog guide is also a best friend. 25 a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all 26 the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it 27 training and gets used to 28 around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school 29 whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 30 that pass the tests go into a training 31 . For the next four-to-six months, the dog learns everything 32 needs to become a dog 33 . The dog learns to stay focused. It learns to ignore food, smell, and other animals. It learns to remain 34 by such noises such 35 shouting or music from a passing ear radio. It learns to 36 commands like" right", "left" or" forward". The dog learns to stop before every curb and stairway and to 37 moving objects. In short, good dog guides learn to keep their 38 safe while they go about the everyday actions of life. A dog that 39 completed training will be 40 a master.

A:trained B:to train C:training D:train

Direction: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. Choose the ONE answer that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre. Dogs are often 21 man’s best friend. For those who are blind, a dog is 22 than a friendly company. A dog is a pair of sharp eyes. A 23 dog guide gives blind people the 24 to move through the world safely and freely. A dog guide is also a best friend. 25 a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all 26 the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it 27 training and gets used to 28 around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school 29 whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 30 that pass the tests go into a training 31 . For the next four-to-six months, the dog learns everything 32 needs to become a dog 33 . The dog learns to stay focused. It learns to ignore food, smell, and other animals. It learns to remain 34 by such noises such 35 shouting or music from a passing ear radio. It learns to 36 commands like" right", "left" or" forward". The dog learns to stop before every curb and stairway and to 37 moving objects. In short, good dog guides learn to keep their 38 safe while they go about the everyday actions of life. A dog that 39 completed training will be 40 a master.

A:guide B:training C:test D:blind

Dogs are often【C1】______man’s best friend. For those who are blind, a dog is【C2】______than a friendly company. A dog is a pair of sharp eyes. A【C3】______dog guide gives blind people the【C4】______to move through the world safely and freely. A dog guide is also a best friend. 【C5】______a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all【C6】______the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog and its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it【C7】______training and gets used to【C8】______around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school【C9】______whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 【C10】______that pass the tests go into a training【C11】______ For the next four-to-six months, the dog learns everything【C12】______needs to become a dog 【C13】______The dog learns to stay focused. It learns to ignore food, smell and other animals. It learns to remain【C14】______by such noises such【C15】______shouting or music from a passing car radio. It learns to【C16】______commands like "right", " left" or " forward ". The dog learns to stop before every curb and stairway and to【C17】______moving objects. In short, good dog guides learn to keep their【C18】______safe while they go about the everyday actions of life. A dog that【C19】______completed training will be【C20】______a master.【C13】

A:guide B:training C:test D:blind

Dogs are often【C1】______man’s best friend. For those who are blind, a dog is【C2】______than a friendly company. A dog is a pair of sharp eyes. A【C3】______dog guide gives blind people the【C4】______to move through the world safely and freely. A dog guide is also a best friend. 【C5】______a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all【C6】______the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog and its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it【C7】______training and gets used to【C8】______around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school【C9】______whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 【C10】______that pass the tests go into a training【C11】______ For the next four-to-six months, the dog learns everything【C12】______needs to become a dog 【C13】______The dog learns to stay focused. It learns to ignore food, smell and other animals. It learns to remain【C14】______by such noises such【C15】______shouting or music from a passing car radio. It learns to【C16】______commands like "right", " left" or " forward ". The dog learns to stop before every curb and stairway and to【C17】______moving objects. In short, good dog guides learn to keep their【C18】______safe while they go about the everyday actions of life. A dog that【C19】______completed training will be【C20】______a master.【C3】

A:trained B:to train C:training D:train

Dogs are often【C1】______man’s best friend. For those who are blind, a dog is【C2】______than a friendly company. A dog is a pair of sharp eyes. A【C3】______dog guide gives blind people the【C4】______to move through the world safely and freely. A dog guide is also a best friend. 【C5】______a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all【C6】______the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog and its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it【C7】______training and gets used to【C8】______around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school【C9】______whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 【C10】______that pass the tests go into a training【C11】______ For the next four-to-six months, the dog learns everything【C12】______needs to become a dog 【C13】______The dog learns to stay focused. It learns to ignore food, smell and other animals. It learns to remain【C14】______by such noises such【C15】______shouting or music from a passing car radio. It learns to【C16】______commands like "right", " left" or " forward ". The dog learns to stop before every curb and stairway and to【C17】______moving objects. In short, good dog guides learn to keep their【C18】______safe while they go about the everyday actions of life. A dog that【C19】______completed training will be【C20】______a master.【C13】

A:guide B:training C:test D:blind

Direction: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. Choose the ONE answer that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre. Dogs are often 21 man’s best friend. For those who are blind, a dog is 22 than a friendly company. A dog is a pair of sharp eyes. A 23 dog guide gives blind people the 24 to move through the world safely and freely. A dog guide is also a best friend. 25 a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all 26 the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it 27 training and gets used to 28 around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school 29 whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 30 that pass the tests go into a training 31 . For the next four-to-six months, the dog learns everything 32 needs to become a dog 33 . The dog learns to stay focused. It learns to ignore food, smell, and other animals. It learns to remain 34 by such noises such 35 shouting or music from a passing ear radio. It learns to 36 commands like" right", "left" or" forward". The dog learns to stop before every curb and stairway and to 37 moving objects. In short, good dog guides learn to keep their 38 safe while they go about the everyday actions of life. A dog that 39 completed training will be 40 a master.

A:guide B:training C:test D:blind