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Key Fact
Everyone with Prader-Willi syndrome is an individual

Behavioural Characteristics

When people have a diagnosis of Prader-Willi syndrome it means that they are more likely to engage in certain behaviours than people without this syndrome. This is known as a ‘behavioural phenotype.’ However, this does not mean that everyone with Prader-Willi syndrome will show this behaviour and it is extremely important to remember that everyone with Prader-Willi syndrome is an individual.


Understanding which behaviours are more likely to occur in Prader-Willi syndrome means that parents, carers and professionals are in a stronger position to support a person because they can learn about why this behaviour is happening and develop interventions that are specific to people with this syndrome.


The following sections describe a range of behaviours including;


Descriptions of each of these behaviours can be found in the corresponding subsection on this website or you can visit the Key Topics pages to get a general overview of each of these areas.

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