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2.5.2 Genetic explanations

Earliest investigators noted that dyslexia tends to run in families, and studies involving extended families or twins have confirmed this. The heritability of dyslexia is estimated at around 50 per cent ‘about half of the variability in dyslexic traits found in the general population could be attributable to genetic variation’. However, the mode of inheritance is not known, and as with most behaviourally defined conditions, genetic studies of dyslexia are complicated by a number of f
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2.2.1 The phonological processing deficit

Recall Alexander Faludy's difficulties in learning to read and write, and the other behavioural characteristics associated with having dyslexia. You might have noticed that many features of dyslexia point to a difficulty with some aspects of memory. That is, people with dyslexia have difficulty with tasks that require short-term memory processing such as mental arithmetic, writing and learning new information. However, these tasks have an additional feature in common: they contain a phonologi
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1.7.3 Differentiating dyslexia from other developmental conditions

While dyslexia is distinctive, there are other developmental syndromes that often co-occur with it. Examples include:

  • developmental dysphasia – specific difficulties with spoken language

  • attention deficit/hyperactivity disorder – involving particular problems with concentration and/or behaviour

  • developmental dyspraxia – developmental coordination disorder.

Developmental dysphasia


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Práctica 7 Los acentos del español: El acento castellano y los acentos no castellanos
In this unit materials you will learn about the history of Spain and the important place of Arab and Jewish cultures in Spanish history. You will study a number of language points to help you talk about history and will write descriptive texts using a variety of stylistic devices.
Author(s): The Open University

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A list of the public domain sources for some of the printed musical examples in Connexions.
Author(s): Catherine Schmidt-jones

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Thème : Vaccination antigrippale et immunodépression
Titre : Vaccinologie 2011 - Grippe nosocomiale
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L’auteur n’a pas transmis de conflit d’intérêt concernant les données diffusées dans cette vidéo ou publiées dans la référence citée.
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Titre : Vaccinologie 2011 - Évolution des virus grippaux, conséquences immunologiques
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Basics of Space Flight - Gravitation and Mechanics
In any solar system, planets move in orbits around a star, bound to it by gravitation. Orbital paths are elliptical in shape. Users can explore concepts such as gravitational force, the properties of ellipses, Newton's principles of mechanics, Kepler's laws, orbital acceleration, and tidal effects. This is part of the NASA Jet Propulsion Laboratory's Basics of Space Flight training module. A glossary, dictionary of units of measure, and links to other parts of the module and to related topics ar
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Earthquake Formation
Students learn about the structure of the earth and how an earthquake happens. In one activity, students make a model of the earth including all of its layers. In a teacher-led demonstration, students learn about continental drift. In another activity, students create models demonstrating the different types of faults.
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