- Splinter of the Mind's Eye
- How we learn to read another’s mind by looking into their eyes
- Mind's Eye: A Pre-Reading Strategy | Cult of Pedagogy
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Zeman and two colleagues then had 21 respondents answer questionnaires about their visual experiences, including one known as the Vividness of Visual Imagery Questionnaire VVIQ. Most of the 21 said they realized only in adolescence and early adulthood through conversations or reading that other people could call up images in their mind.
Splinter of the Mind's Eye
And although many of the respondents had dreams or flashes of visual imagery while awake, all were substantially or completely unable to purposely call up images in their mind, such as of past vacations or even their own wedding. Since aphantasia has became the subject of newspaper articles, television reports, blogs and podcasts. A Facebook entry by American software developer Blake Ross, who helped to develop the Firefox browser, has been making the rounds. In it, Ross, too, describes his inability to create visual images.
Many also found it comforting that there was now a name for something that distinguished them from others. They had found it hard to describe in words their inability to visualize. When they tried to explain, they were often met with incomprehension. Zeman was astonished at how grateful these people often were. One of those who approached Zeman—Jonas Schlatter of Berlin—describes his own moment of discovery. Schlatter scored very low on the vividness questionnaire, which is viewed as strongly diagnostic of aphantasia.
But then one evening at a house party, he came to understand that he was wrong. In the kitchen, he got into a conversation about how it could be that a person can simultaneously see something and create a mental image of it. The question initially seemed nonsensical to him, but he realized that he might differ from others in not making mental images. The next morning he began questioning his friends about their experiences and doing some Internet research. To his great surprise, he found that the ability to visualize images is real—except not for him.
His study included control subjects. Most of them showed a moderately good ability to visualize. But there were outliers at both ends of the scale, with more subjects falling at the high end than the low end. Zeman calls the above-average ability to create vivid images hyperphantasia.
The research has raised a number of questions. One is whether aphantasia exists at all.
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Could people who think they are not making mental images simply be describing their images differently from the way other people do? After all, surveys elicit subjective descriptions, not objective measures of what is going on in the brain. Zeman admits that answers on the questionnaire are prone to a certain amount of error, but he is convinced that aphantasia actually occurs. For example, some individuals with aphantasia report weakness in autobiographical memory, remembrance of events in their lives.
In addition, many with aphantasia also suffer from prosopagnosia, impaired face recognition. To Zeman, the links to other conditions indicate that there may be several subgroups of aphantasia.http://www.cantinesanpancrazio.it/components/robezag/1263-come-copiare-rubrica.php
How we learn to read another’s mind by looking into their eyes
Joel Pearson, professor of cognitive neuroscience at the University of New South Wales in Australia, also considers aphantasia to be real. As part of his work, he studies binocular rivalry, a perceptual phenomenon that occurs when people are shown different images simultaneously to their left and their right eye. Here subjects do not see a combination of both images but rather only one at a time. Pearson and his team have discovered that a simple trick can influence which image is given priority.
Asking volunteers to visualize one of the images before the test increases the probability that that image will come to the fore during the test. Yet self-diagnosed aphantasics are unaffected, indicating that visualization is impaired. Zeman and others are also exploring how brain functioning differs in those with aphantasia. He and his colleagues recently invited more than people to undergo a brain scan at his laboratory.
They found that when individuals who scored high on the VVIQ were asked to visualize something, only a few brain areas became activated. Researchers have found that these regions light up when processing complex images, such as faces, events and spatial relationships. In contrast, more and different brain regions lit up in people who reported that they lack the ability to visualize. Those individuals tended to use regions associated with the control of behavior and planning, as was seen in MX. Zeman has not yet studied extensively the other extreme, hyperphantasia.
Many people with hyperphantasia have told him, however, that they easily lose themselves in daydreams about the past or the future. In contrast to aphantasia, hyperpahantasia has not yet been found to have links to face recognition or memory. Zeman initially presumed that visualization was central to the creative process. Yet many of the people with aphantasia who contacted him work successfully in creative professions—as artists, architects and scientists.
Mind's Eye: A Pre-Reading Strategy | Cult of Pedagogy
Jonas Schlatter, for example, creates Web sites for a start-up that he founded. His business partner thought it a bit odd that he used whiteboard, paper and a pencil in the design process. But Schlatter now understands that this approach is the only way that he can anticipate how the Web pages will eventually look. Echo Chrissanna.
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