science

Pervasive refusal syndrome

Pervasive refusal syndrome is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Pervasive refusal syndrome rather than just read about it. In short: Pervasive refusal syndrome (PRS), also known as pervasive arousal withdrawal syndrome (PAWS), is a hypothesized pediatric mental disorder. PRS is not included in the standard psychiatric classification systems; that is, PRS is not a recognized mental disorder in the World Health Organization's ICD-11 and the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM…

Key takeaways

Pervasive refusal syndrome belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Pervasive refusal syndrome to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Pervasive refusal syndrome from memory before moving on to harder problems.

Reference excerpt

Pervasive refusal syndrome (PRS), also known as pervasive arousal withdrawal syndrome (PAWS), is a hypothesized pediatric mental disorder. PRS is not included in the standard psychiatric classification systems; that is, PRS is not a recognized mental disorder in the World Health Organization's ICD-11 and the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5).

Signs and symptoms According to some authors, PRS symptoms have common characteristics with other psychiatric disorders, but (according to these authors) current psychiatric classification schemes, such as the Diagnostic and Statistical Manual of Mental Disorders, cannot account for the full scope of symptoms seen in PRS. Purported symptoms include extremely low mood, severe anxiety, partial or complete refusal to eat, move, talk, or care for oneself; active and angry resistance to acts of help and support; social withdrawal; and school refusal.

Causes Psychological trauma might be a causal factor because PRS is repeatedly seen in refugees and witnesses of violence. Viral infections might be a risk factor for PRS.

Mechanism Some authors hypothesize that learned helplessness is one of the mechanisms involved in PRS. A number of cases have been reported in the context of eating disorders.

Epidemiology Epidemiological studies are lacking. Pervasive refusal syndrome is reportedly more frequent in girls than boys. The average age of onset is purported to be 7–15.

See also Resignation syndrome Asylum seekers with apathetic refugee children

References

Worked examples

Example 1 — a first encounter with Pervasive refusal syndrome

Start with the simplest possible case. Write down what Pervasive refusal syndrome claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Pervasive refusal syndrome before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Pervasive refusal syndrome ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Pervasive refusal syndrome

In research: Pervasive refusal syndrome appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Pervasive refusal syndrome in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Pervasive refusal syndrome is common in secondary-school and first-year university syllabi. It links to neighbouring topics Psychopathological syndromes, so understanding it makes those chapters shorter.
In everyday life: Look for Pervasive refusal syndrome outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Pervasive refusal syndrome in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pervasive refusal syndrome means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Pervasive refusal syndrome out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pervasive refusal syndrome in simple terms?

Why does Pervasive refusal syndrome matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Pervasive refusal syndrome?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Pervasive refusal syndrome.