试题详情
阅读理解-阅读单选 适中0.65 引用3 组卷114

To learn new things, we must sometimes fail. But what's the right amount of failure? New research led by the University of Arizona proposes a mathematical answer to that question.

Educators have long recognized that there is something of a "sweet spot" when it comes to learning. That is, we learn best when we are challenged to grasp something just outside of our existing knowledge. When a challenge is too simple, we don't learn anything new; likewise, we don't expand our knowledge when a challenge is so difficult that we fail entirely or give up.

So where does the sweet spot lie? According to the new study, it's when failure occurs 15% of the time. Put another way, it's when the right answer is given 85%of the time.

Researchers at the University of Arizona came up with the so-called "85% Rule" after conducting a series of machine-learning experiments in which they taught computers simple tasks, such as classifying different patterns into one of two categories.

The computers learned fastest in situations in which the difficulty was such that they responded with 85% accuracy.

"If you have an error rate of 15% or accuracy of 85%, you are always maximizing your rate of learning in these two-choice tasks," said Professor Robert Wilson.

When we think about how humans learn, the 85%Rule would mostly likely apply to perceptual(感知的)learning, in which we gradually learn through experience and examples, Wilson said. Imagine, for instance, a radiologist(放射科医生)learning to tell the difference between images of tumors(肿瘤)and non-tumors.

"You need examples to get better at figuring out there's a tumor in an image, "Wilson said. "If I give really easy examples, you get 100% right all the time and there's nothing left to learn. You're not going to be taking as much from that as a situation where you are struggling a little hit. If I give really hard examples, you'll he 50% correct and still not learning anything new, while if I give you something in between, you can he at this sweet spot where you are getting the most information from each particular example."

【小题1】Which of the following is linked with the sweet spot?
A.15 percent accuracy.B.50 percent accuracy.
C.85 percent accuracy.D.100 percent right.
【小题2】Why did the researchers teach computers simple tasks?
A.To find out where the sweet spot lies.B.To see how well computers carry out tasks.
C.To compare the results of their experiments.D.To conduct some research on machine learning.
【小题3】What is the purpose of the "examples" mentioned in the last paragraph?
A.To teach what to do in the treatment of tumors.B.To teach how to determine there is a tumor.
C.To help to remember what is learned.D.To help to learn how a tumor develops.
【小题4】According to the text, what is the most effective way of learning?
A.Not taking failure too seriously.B.Learning through experience and examples.
C.Struggling a little bit, but not too much.D.Learning things that are completely new.
20-21高三上·湖南·开学考试
知识点:学习科普知识 说明文语意转化逻辑推理目的意图 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!
类题推荐

When I received my admission decision for Middlebury, my mouth dropped open in genuine (真的) shock. 【小题1】 Feeling unprepared, I was considering taking a gap year.

However, in processing this, I could only think about the negative points of taking a break between high school and college. I would fall behind my peers. I would forget everything I learned in high school with seven months of no learning. 【小题2】

Upon arriving at Middlebury for the admitted student days, I was amazed at the beauty of the town and the campus. While speaking with Midd kids (as students are called), they all appeared happy and generally stress-free.

【小题3】 In August, a few Midd kids I had met and befriended during the admitted student days suggested going to Newburyport, MA for a week. For the first time, I went on a road trip with someone I had only known for a few months. Yet, this trip showed me the freedom of being an independent adult in a way I had not felt at home.

【小题4】 My gap semester was the best beginning to adulthood because it helped me become mature in an unexpected and enriching manner, 【小题5】

To students reflecting on a gap year, be brave and do things that are outside your comfort zone. Talk to people: the world has so much to teach.

A.I didn’t think I was a worthy enough candidate to get accepted.
B.It was my way of letting go and starting a new chapter of my life.
C.But eventually I decided to apply to Middlebury for a few reasons.
D.I also opened my mind to the benefits of talking some time off from my studies.
E.I felt like a gap year would narrow down what I wanted to study and do in my life.
F.My trips provided me with a sense of freedom and independence I did not experience during my teens.
G.Once I restarted my academic studies, I would actually perform better than those who went straight from high school to college.

We know that choosing a college major can be very hard. But don’t worry! Your choice of major will not lock you into a specific career for the rest of your life. 【小题1】

What is a major?

【小题2】Beyond general college requirements, you'll also take a group of courses in a subject of your choosing such as chemistry, literature, or political science .

How important is my major?

The major you choose will neither predict nor guarantee your future. Many graduates find jobs that have nothing to do with what they have studied in college. If you intend to earn a professional degree after college, you will probably need certain courses. But many future doctors major in non-science related fields.

When do I declare a major?

This varies widely according to schools and programs.【小题3】 Others require that you declare a major by the time you set foot in your first class.

【小题4】

Definitely. One of the most exciting aspects of college life is that it introduces you to new subjects and arouses new passions. However, keep this in mind : Every major has necessary coursework. If you change your major late in the game, it may take more than the traditional four years to earn a degree.

What are minors and double majors?

If one field of study doesn't satisfy your intellectual appetite, consider a minor. A minor is similar to a major, which is an area of academic concentration.【小题5】Double majors provide you with an understanding of two academic fields. It allows you to become familiar with two sets of values and views while it also requires you to fulfill two sets of requirements.

A.Some schools may give you one year or more to decide.
B.The only difference is that it doesn't require as many classes as major.
C.It is your specialized area of study in college.
D.Most students find one major is more than enough.
E.Can I change my mind?
F.Here's what you need to know about college majors before you choose.
G.Is my major time-consuming?

In many adults, learning and thinking begin to decline (衰退) as early as age 30 and become worse in their mid-60s, which is shown in tests of cognitive(认知的) abilities.

These changes are often considered as the result of normal aging. But they may instead show something more like the “summer slide” that some schoolchildren experience in study process during summer break. After formal education and job training end, many adults experience years of reduced chances of learning.

However, a three-month study Rachel Wu and her partners designed suggests that this decline can be addressed. In this study, they provided an encouraging learning environment for 24 older adults between 58 and 86 years of age. Before and after, they tested the cognitive abilities. The older adults signed up for at least three classes that met weekly to learn new skills, such as drawing, iPad using and Spanish-language learning. During this period, the adults’ cognitive scores for memory improved greatly, and their cognitive abilities after one year were similar to those of adults 50 years younger.

The team is still investigating why their cognitive scores continued to climb after the program’s end, but one possibility is that the experience encouraged these adults to continue learning and practice new skills. To be clear, the researchers do not think that formal education is the only or most important way to support learning. Their idea is to instead create encouraging environments for older adults, so they can increase both real-world skills and cognitive abilities over the long term.

“Use it or lose it,” the saying goes. Let’s change the conversation about adults from avoiding loss and decline, or keeping what people have, to learning and growing.

【小题1】What leads to the decline in cognitive abilities?
A.Age-related diseases.B.Slower processing speed.
C.Too many holiday breaks.D.Fewer learning experiences.
【小题2】How did Rachel Wu and her partners conduct their research?
A.By doing surveys.B.By arranging interviews.
C.By searching documents.D.By making comparisons.
【小题3】What can we learn from Paragraph 4?
A.Learning contributes to physical improvement.
B.Taking classes is key to cognitive development.
C.Positive learning environments should be created.
D.Older adults need to practice their language skills.
【小题4】What’s the author’s attitude toward the study?
A.Unclear.B.Supportive.C.Doubtful.D.Worried.

组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网