science

Informant (psychiatry)

Informant (psychiatry) 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 Informant (psychiatry) rather than just read about it. In short: In psychiatry, an informant is someone who can report on a case without causing observer effects. For example, informants may be family members or friends of a psychiatric patient.

Key takeaways

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

Reference excerpt

In psychiatry, an informant is someone who can report on a case without causing observer effects. For example, informants may be family members or friends of a psychiatric patient. Informants are particularly important when the patient's lucidity is questionable; for example, in cases of dementia, or when the patient is a child. Data collected from informants must be used with caution, because informants are rarely in a position to provide completely accurate information. In such cases, it is necessary to interview multiple informants and combine the data. Further compounding the difficulty, informants may also suffer from conditions themselves, which makes them more likely to describe others as having the informant's condition. It is not clear whether this makes them more or less objective than healthy informants.

See also Informant Questionnaire on Cognitive Decline in the Elderly

References

Worked examples

Example 1 — a first encounter with Informant (psychiatry)

Start with the simplest possible case. Write down what Informant (psychiatry) 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 Informant (psychiatry) 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 Informant (psychiatry) 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 Informant (psychiatry)

In research: Informant (psychiatry) 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 Informant (psychiatry) 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: Informant (psychiatry) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Psychiatric assessment, Psychiatry stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Informant (psychiatry) 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 Informant (psychiatry) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Informant (psychiatry) 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 Informant (psychiatry) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Informant (psychiatry) in simple terms?

In psychiatry, an informant is someone who can report on a case without causing observer effects. For example, informants may be family members or friends of a psychiatric patient.

Why does Informant (psychiatry) 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 Informant (psychiatry)?

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 Informant (psychiatry).