Passage One
Read the text and answer questions 1-13.
Passage Two
Read the text and answer questions 14-26.
Passage Three
Read the text and answer questions 27-40.
sorry-who are you?
Prosopagnosia is a medical condition that stops people from recognizing people’s faces, but how common is it and why does it happen?
It was Jacob Hodes' first day at college. He can recall spending an enjoyable afternoon being shown around campus by a second-year student named Daniel Byrne, who happened to be from his hometown. Jacob then spent the rest of the year ignoring him. “I never saw him again,” he says. “Well, I’m sure I walked past him plenty of times, but I just didn’t see him.” This behavior wasn’t intentional. Jacob just couldn’t recollect what his fellow student looked like. He had had that same trouble all his life. Friends and relatives would greet him, and he would have no idea who they were.
It wasn’t until five years ago that it all made sense. That was when Hodes was diagnosed with prosopagnosia, a condition that means he is unable to recognise faces. According to researchers, he is far from alone. In fact, the condition is not that uncommon, but until a few years ago, only a few dozen cases had ever been described, and all of these had been caused by brain injury. Recently, though, researchers identified a second form of face blindness – developmental prosopagnosia, which is either present from birth or develops very early in life.
In May, a team from Harvard University in the US and University College London (UCL) announced the results of a web survey of 1,600 people, suggesting that up to 2 per cent of people may have some degree of face blindness. Then in August, Martina Gruter and colleagues at the Institute for Human Genetics in Munster, Germany, similarly reported that 2.5 per cent of a group of 700 secondary school pupils they had tested had trouble recognising faces. The results of the survey took everyone by surprise.
It seems that if you have never known what it is to recognise a face, you don’t necessarily know that you are supposed to be able to. Prosopagnosics almost always know that they have trouble recognising things, but they often don’t realise that other people have better face recognition skills than they do, says Brad Duchaine, a researcher at UCL.
Despite these issues, the majority of developmental prosopagnosics possess strategies that allow them to compensate quite skillfully, for instance by recognising hair, clothing, gait, or voice. Some, though, still find their social lives severely affected and become quite depressed as a result. Some are unable to recognise members of their own family. Even so, the discovery of developmental prosopagnosia is likely to benefit many neuroscientists investigating how the brain solves the problem of how the brain deals with identity. Understanding how people who can’t recognise faces manage to get by will help scientists understand normal face recognition too, and may even have applications in areas such as security or computer vision.
One issue, however, that will present challenges for researchers is that no two prosopagnosics are the same. Some have problems only with faces, while others have trouble with ordinary everyday objects, and so it turns out, animals which would normally be familiar as well. Some prosopagnosics can train themselves to recognise specific faces; others can’t even recognise their own in a mirror. When some have been tested, they could identify the emotion which was conveyed on another’s face, even though the face itself seemed unfamiliar, while for other subjects this was an impossibility. Some cannot recognise the faces of old friends or fellow students but have no trouble identifying whether a particular face meant such groups you would be attractive to most people. Because of this diversity, working out the cause of prosopagnosia will not be easy.
In Martina Gruter’s study, the prosopagnosics who agreed to have their parents and relatives tested reported at least one with the condition. Having looked at 38 cases in seven families, the German team believe they have good evidence that a single gene could be responsible. Duchaine also has some evidence that face blindness could be inherited but thinks other factors might be more significant. He refers to studies of babies born with a condition which means the eye’s lens is not clear, and when it’s then re-opened, being unable to see through this eye during the first two months of life is a major risk factor for prosopagnosia.
Whatever the cause, what most prosopagnosics want to know is whether they can do anything to improve their face recognition skills. Joseph DeGutis, a graduate student at the University of California, recently reported successfully training a severe developmental prosopagnosic to recognize faces that she had never seen before in the laboratory. The subject also reported that recognising faces in everyday life became easier due to the training. Duchaine says that other prosopagnosics have found that their face recognition improves after spending more time meeting familiar people, for example, and several of his colleagues. Thomas and Martina Gruter’s husband, for example, have also experimented with a new method that works. “I don’t know how the brain learns to recognise faces, but it seems it can be done,” he says. “Humans already spend all day long doing exercises for recognising faces without realising it.” When doing these recognition tests, she memorised the distance between the nose and upper lip. She wasn’t able to do so. You can perform it well in the social and real life.
MAMMOTH KILL
What led to the disappearance of the giant mammals? Kate Wong examines the theories
Although it’s hard to imagine in this age of urban sprawl and automobiles, North America once belonged to huge, elephant-like mammoths, camels, bear-sized beavers, and other giant beasts, collectively known as ‘megafauna’. Some 11,000 years ago, however, these large-bodied mammals – about 70 species in all – disappeared. Their demise coincided roughly with the arrival of humans in this era and dramatic climate change – factors that have inspired several theories about the die-off. Yet despite decades of scientific investigation, the exact cause remains a mystery. Now new findings offer support to one of these controversial hypotheses: that human hunting drove these huge megafauna species to extinction.
This belief resulted in the overkill model, which emerged in the 1960s, when it was put forth by Paul S. Martin of the University of Arizona. Since then, critics have charged that no archaeological remains exist to support the idea that the first Americans hunted to the extent necessary to cause these extinctions. But at the annual meeting of the Society of Vertebrate Paleontology in Mexico City in October 1999, specialist John Alroy of the University of California at Santa Barbara argued that, in fact, hunting-driven extinction is not only plausible, it was unavoidable. He has determined, using a computer simulation, that even a very modest amount of hunting would have wiped out these animals.
Assuming an initial human population of 100 people that grew no more than two per cent annually, Alroy determined that, if each band of, say, 50 people killed 15 to 20 large animals a year, humans could have eliminated the animal populations within 1,000 years. Large mammals in particular would have been vulnerable to the pressure because they have longer gestation periods than smaller mammals and their young require extended care.
However, not everyone agrees with Alroy’s assessment. For one thing, the results depend on population size estimates for these extinct animals – estimates that are not necessarily reliable. But the most serious criticism comes from mammal expert Ross D.E. MacPhee of the American Museum of Natural History in New York City, who points out that the relevant archaeological record contains barely a dozen examples of stone points embedded in mammoth bones (and none, it should be noted, are known from other megafaunal remains) – hardly what one might expect if hunting drove these animals to extinction. Moreover, some of these species had a vast range, covering the whole continent – the Jefferson’s Ground Sloth, for example, lived as far north as the Yukon and as far south as Mexico – which would have made hunting them in numbers sufficient to cause their extinction rather unlikely, he says.
MacPhee agrees that humans most likely brought about these extinctions (as well as others around the world that coincided with human arrival), but not directly. Rather than through hunting, he proposes that people may have introduced a deadly disease, perhaps through their dogs or accompanying vermin, which then spread wildly among the naive native species that had never developed resistance to the new infection. In this view, outbreaks of a deadly disease could thus quickly drive them to the point of no return. So far, MacPhee and others have no empirical evidence for this theory, and it will not be easy to come by: the disease would kill far too quickly to leave its signature on the bones themselves. But he reckons that analyses of tissue and DNA from the most recent animal remains will eventually reveal the microbes responsible.
The third explanation for what brought on this North American extinction does not involve human beings. Instead, its proponents blame the loss on the climate. The Pleistocene epoch witnessed widespread climatic instability, explains Russell W. Graham of the Denver Museum of Nature and Science. As a result, their regular habitat disappeared, and species that had once formed communities split apart. Some, like alligators in the Great Plains, moved south; others, like lemmings in Florida, moved north. The more temperature- or rainfall-sensitive megafauna, however, were literally caught in the middle, thrown off. With shrinking geographical ranges, a death rate among young that populations could not sustain. Yet other Pleistocene creatures managed to maintain viable populations throughout most of the Pleistocene, and some of them, a final major fluctuation pushed them over the edge, Graham says.
For his part, Alroy is still convinced that human hunters were the destroyers of the giant mammals. The overkill model explains everything the disease and climate scenarios explain, he asserts, and in addition makes accurate predictions about which species would eventually become extinct.
Keeping the fun in funfairs
Fun is becoming a tricky issue for ride designers
A Fun is becoming a tricky issue for ride designers. In order to increase excitement, they have been ramping up the accelerations to create the most dizzying forces possible. But getting it right is far from easy. Err on the side of caution, and people won’t bother with a second ride. Go too far, however, and they may not be able to. Experts realize we are now at the limit of how much acceleration a human body can take, and designers are finding it hard to think up ways of keeping the public coming back for more. The problem is that true innovation has been lacking for a while, and fairground rides have become more about survival than actual enjoyment. So if our thrill-seeking bodies can really take no more, what’s going to keep dragging us back to amusement parks? Creating something new and exciting, yet safe, is going to take some careful thought.
B When the Disney Corporation asked German designer Walter Stengel to design a giant loop for them in the 1970s, he went to NASA, the aeronautics and space foundation, to discover the effects of sustained acceleration on pilots. NASA’s research suggests that the maximum level one can endure is 9 g: g being the standard unit of acceleration due to gravity. Go much beyond that, and pilots pass out. Go further still, and they suffer serious internal damage. So Stengel decided that the maximum vertical acceleration for the public should be 6 g, and then only for a second or so. What’s more, he put firm restrictions on the rate at which acceleration can increase – you’ll never go down a 45-degree ramp into a tight circular loop, for instance.
C But stricter safety limits only intensify the need to search for novel ways to thrill customers. Part of the problem is that no matter how exciting an attraction is, after a few rides, passengers will have some idea of what to expect. The next stage in designing rides, however, could throw predictability out of the window. This may best already be taken in the most recent waltzers, or tea cup rides. Like a waltzer, you sit in a car that spins on its own axis. The car is on a huge platform that also rotates. In the past, you could take comfort from the fact that the spin was tightly controlled. The next step would be to allow cars to be reined by the rotation speed of the whole ride. But the latest generation of waltzer cars spin freely, at the mercy of the weight and position of the people in them. So you never have the same ride twice. “People seem to like these ‘chaotic rides’,” says Stengel.
D Although seemingly a passport to endless thrills, chaos does have one rather obvious drawback: it’s unpredictable. Despite complex calculations, designers can never be completely sure that something odd won’t happen, especially if free-turning systems occasionally hit a resonance frequency. For example, if pushed at a particular frequency, a child on a swing would go over the top. The same goes for simulators; if you drive a revolving waltzer car at its resonance frequency, it could speed up uncontrollably. This could be very hazardous, according to Stengel. If a ride is subjected to unforeseen stresses, no one can guarantee that it will be able to cope.
E No one even knows what the safe limits of rotational force are, let alone its effect on the body. Yet according to the German Air Force, where rotary volunteers head for the centrifuge and then the cartwheel or spin their bicycle balance test machine, rotational motion is much better tolerated when the head is kept level. So if amusement park rides have better headrests, they could safely spin people more. But Stengel was not particularly puzzled by what he doesn’t understand; he tries to limit how people’s minds are rotated. We want to provide fun, not risk.
F With that goal in mind, Stengel feels that flinging people around in ever more chaotic machines is no longer the way forward. He believes that the sequence of accelerations, not their size, is what counts and that the way to make rides more fun is to put people through a carefully designed succession of relatively small accelerations. Other experts in this field agree, and it seems likely that designers could formulate profiles even for existing attractions that would lead to higher amusement value. Recent experiments testing the tolerances of Dutch military pilots to a range of accelerations have shown that tumbling around in machines doesn’t have to be unpleasant. When the force is kept low, the subjects actually enjoy the experience.
G The fun seems to come from the unforeseen, particularly when an effect called the Coriolis Illusion comes into play. This is an agreeable tumbling feeling which occurs, for example, when the head is suddenly tilted while the subject is spinning with eyes closed. It appears that a roll which includes, for instance, an unexpected change of acceleration from a small negative g – a feeling of weightlessness – to a small positive g – a slight crushing sensation – has an extraordinary effect on people. If the theories of Stengel and other experts really do work, fairground fun might one day be measured in smiles, not screams.
Questions 1–7
Do the following statements agree with the information given in Reading Passage 1?
In boxes 1–7 on your answer sheet, write:
- TRUE if the statement agrees with the information
- FALSE if the statement contradicts the information
- NOT GIVEN if there is no information on this
1 Before attending college Jacob was capable of recognising people he knew well.
2 Researchers believe that prosopagnosia may be a growing problem.
3 It is harder to identify developmental prosopagnosia in babies than in young children.
4 A German study seems to support the Harvard and UCL research findings.
5 In general, prosopagnosics are aware that other people can recognise faces more easily than they can.
6 In most cases, prosopagnosics have developed ways to deal with their problem.
7 The study of prosopagnosia may help neuroscientists to treat different kinds of brain injury.
Questions 8–13
Complete the notes below.
Choose ONE WORD ONLY from the passage for each answer.
Write your answers in boxes 8–13 on your answer sheet.
The challenges for prosopagnosia researchers
Differences in prosopagnosics
- - As well as being unable to recognize facial features prosopagnosics may also have problems recognizing commonly seen 8 and objects.
- - The 9 on someone else’s face.
Some prosopagnosics can recognize that people are regarded as attractive by others.
Causes of prosopagnosia
- - Prosopagnosia may be caused by just one 10 according to Martina Gruter.
- - A defect in the 11 eye according to Brad Duchaine.
Treatment for prosopagnosia
- - Joseph Degutis patent proved he had been successfully trained to recognize faces inside the 12 and in the outside world.
- - Thomas Gruter doubts that training will work and mentions that 13 by some subjects can affect research results.
Questions 14–20
Complete the summary below.
Choose NO MORE THAN TWO WORDS from the passage for each answer.
Write your answers in boxes 14–20 on your answer sheet.
Three theories have been put forward to explain the disappearance of the different species of large mammals that inhabited 14 11,000 years ago. The 15 proposed around fifty years ago by Paul S Martin, blames 16 by people for mass extinction. Computer calculations seem to support this explanation, but critics question the reliability of the figures they are based on.
The second theory suggests that humans introduced a 17 which wiped out the large mammals. However, so far this theory also lacks any 18 .
The final theory suggests that this period experienced significant 19 which eventually led to the loss of habitat and to the division of the 20 that some of the large mammals had organized.
Questions 21–26
Look at the following statements (Questions 21–26) and the list of people below.
Match each statement with the correct person, A, B, or C.
Write the correct letter in boxes 21–26 on your answer sheet.
List of People — A. John Alroy B. Ross D E Macpehee C. Russell W Graham
NB You may use any letter more than once.
21 Too little evidence exists to support the hunting theory.
22 The bigger the animal, the bigger the territory it requires for survival.
23 Globally, humans have been indirectly responsible for the elimination of many species.
24 Population estimates can be used to understand how large mammals become extinct.
25 Scientific examination of fossil remains may provide some proof for one of the theories.
26 Environmental changes negatively affected the social groupings of some large species.
Questions 27–32
Reading Passage 3 has seven paragraphs, A–G.
Choose the correct heading for paragraphs B–G from the list of headings below.
Write the correct number, i–viii, in boxes 27–32 on your answer sheet.
List of Headings
i. Less is more
ii. Research can’t guarantee safety
iii. Unexplained symptoms
iv. Setting the limits of acceleration
v. The irresistible appeal of speed
vi. Gentle surprises
vii. A difficult task
viii. A different ride every time
Example Paragraph A: vii
27 Paragraph B
28 Paragraph C
29 Paragraph D
30 Paragraph E
31 Paragraph F
32 Paragraph G
Questions 33–37
Complete the sentences below.
Choose NO MORE THAN TWO WORDS AND/OR A NUMBER from the passage for each answer.
Write your answers in boxes 33–37 on your answer sheet.
33 Some attractions such as the new type of waltzers, depend on both the and of their passengers in order to create a variety of ride experiences.
34 Designers need to be aware that a “chaotic” ride could accelerate at a violent rate if it reaches its .
35 Research has shown that people will begin to feel ill if they are subjected to movement on all at the same time.
36 Volunteers in Stengel’s rotation tests suffered delayed reactions such as .
37 A phenomenon known as the produced a pleasurable sensation in test subjects.
Questions 38–40
Do the following statements agree with the claims of the writer of Reading Passage 3?
In boxes 38–40 on your answer sheet, write:
- YES if the statement agrees with the claims of the writer
- NO if the statement contradicts the claims of the writer
- NOT GIVEN if it is impossible to say what the writer thinks about this
38 There is still a lot to be learnt about the rates of acceleration which people can withstand.
39 Children enjoy funfairs more than adults.
40 Current rides could probably be adapted to become more enjoyable.
Results
Score: / 40
IELTS Band:
Post navigation
Previous Post
IELTS Reading Test 36