Source: <https://psychologyforeveryone.com/chapter/33-how-mental-health-conditions-are-assessed-and-diagnosed/>

# How Mental Health Conditions Are Assessed and Diagnosed

*A map, not a verdict*

>

*A diagnosis is a map, not the territory: it shows where help may
lie, and it is never the whole of the person.*

## 33.1 Why diagnosis matters

A good diagnosis can:

**IF YOU ARE WORRIED ABOUT A DIAGNOSIS**

A diagnosis can feel frightening. It is not a life sentence. If it
brings thoughts of harming yourself, tell someone today and contact your
local emergency number or emergency service.

-

Give a name and an explanation for what has been happening, which is
a relief for many people

-

Guide the choice of treatment

-

Allow communication between professionals

-

Provide access to services, support, and sometimes legal protection
or workplace adjustments

-

Show what to expect over time

A diagnosis cannot capture everything about you. It is a tool for
getting the right help, not a definition of who you are.

## 33.2 Who can diagnose?

Depending on the country, mental health diagnoses can be made by
psychiatrists, clinical psychologists, trained family doctors, and some
advanced practice nurses. For complex cases, a team may be involved.

## 33.3 The diagnostic systems

Professionals use two major classification systems:

-

**ICD-11** (International Classification of Diseases,
11th Revision), published by the World Health Organisation and used in
most countries.

-

**DSM-5-TR** (Diagnostic and Statistical Manual of
Mental Disorders), published by the American Psychiatric Association and
widely used in research and in North America.

Both list conditions with symptom descriptions, duration, and the
level of impact on daily life. They aim to make diagnosis consistent
from one professional to another. They are updated as science develops,
which is why some diagnoses have been renamed or reorganised over the
years.

## 33.4 The assessment
process, step by step

### Step 1: The interview

The heart of any assessment is a conversation. The clinician will
usually ask about:

**Figure 33.1** *The steps of an assessment, from
first meeting to a shared plan.*

-

**The current problem:** what you notice, when it
started, how often, how severe, and what makes it better or worse

-

**Mood, anxiety, energy, sleep, and appetite**

-

**Thoughts:** worries, unusual experiences, thoughts of
self-harm or suicide

-

**Behaviour and coping:** including alcohol, drugs, and
medicines

-

**Daily functioning:** work, study, relationships,
self-care

-

**Personal history:** childhood, schooling, major life
events, losses, and any trauma

-

**Past mental health care** and what helped

-

**Family history** of mental illness

-

**Physical health** and medicines

-

**Current life situation:** home, money, support, and
safety

You may be asked sensitive questions. Honest answers, even when
difficult, help the clinician help you.

### Step 2: The mental state
examination

During the interview, the clinician also observes things such as
appearance, speech, mood, thinking, perception (for example, hearing
voices), concentration, memory, and insight into the problem. This
structured observation gives a snapshot of how you are at that time.

### Step 3:
Standardised questionnaires and rating scales

Short questionnaires can help measure the severity of symptoms and
track change over time. Examples include scales for depression (such as
the PHQ-9), anxiety (such as the GAD-7), trauma, ADHD, and many others.
They support a clinician’s judgement; they do not replace it. Online
quizzes that claim to diagnose you are not reliable.

### Step 4: Physical
examination and tests

Because physical illness can mimic or cause mental symptoms,
clinicians may order:

-

Blood tests (thyroid function, blood count, vitamin levels, blood
sugar, liver and kidney function)

-

Checks for alcohol or drug use

-

Blood pressure, heart tests, and weight

-

Brain scans (CT or MRI) when there is a reason to suspect a physical
brain problem, such as head injury, sudden personality change, or
unusual symptoms

-

Sleep studies when sleep problems are prominent

### Step 5: Information from
others

With your permission, relatives, teachers, or partners may give extra
information. For children and for conditions such as ADHD or dementia,
this is especially valuable.

### Step 6: Psychological testing

A clinical psychologist or neuropsychologist may use specialised
tests to assess:

-

**Intelligence and learning:** to understand strengths
and learning difficulties

-

**Attention and memory**

-

**Personality**

-

**Autism and developmental assessments**

-

**Cognitive decline** in older adults

Testing is done in a quiet room and may take from an hour to several
sessions.

### Step 7: Formulation and
diagnosis

The clinician combines all the information into a
**formulation**, a summary that explains what is happening
and why, based on biological, psychological, and social factors. From
this comes a diagnosis (or sometimes a “working diagnosis” that will be
reviewed), along with a plan.

## 33.5 The risk assessment

Every good assessment includes a check of safety. The professional
may ask, directly and kindly, about thoughts of suicide, self-harm, or
harming others, and about protective factors such as family, reasons for
living, and future plans. This is routine and not a sign they think you
are “dangerous.” Honest answers allow the right support.

## 33.6 Common diagnostic
challenges

### Overlap of symptoms

Many conditions share symptoms. For instance, poor concentration
occurs in depression, anxiety, ADHD, trauma, sleep deprivation, and
thyroid disease. Clinicians must carefully tease apart causes.

### Comorbidity

It is common to have more than one condition at once. Around half of
people with one anxiety or mood disorder also have another. A good plan
addresses all of them.

### Changes over time

A diagnosis may be refined as new information appears or as the
person’s situation changes. For example, someone first diagnosed with
depression may later show episodes of mania, leading to a diagnosis of
bipolar disorder.

### Culture and context

Ways of expressing distress differ across cultures. Some communities
describe emotional pain mainly through physical symptoms; others have
culturally specific syndromes. A skilled clinician considers language,
beliefs, and cultural context, and uses interpreters when needed, so as
to avoid misdiagnosis.

### Normal reactions versus
disorders

Grief after a loss, sadness after a setback, or worry before a major
event are normal. Diagnosis is not made merely because someone is upset.
Professionals look for severity, duration, and impact on life.

## 33.7 How accurate is diagnosis?

There is no blood test for most mental illnesses. Doctors agree well
on some diagnoses, such as autism or schizophrenia, and less well on
others, such as anxiety or some personality disorders. Asking for a
second opinion is normal, especially if treatment is not helping.

## 33.8 Understanding
and living with a diagnosis

### Common reactions

People respond to a diagnosis in different ways:

-

**Relief:** “At last I know what is wrong.”

-

**Sadness or fear:** “Will I always be like this?”

-

**Denial:** “They must be wrong.”

-

**Shame or stigma:** “People will think less of me.”

-

**Hope:** “Now I can get the right help.”

All of these are normal. Give yourself time.

### Questions to ask your
clinician

1.

What is my diagnosis, and what does it mean in plain words?

2.

What do you think caused it?

3.

How certain are you, and could anything else be going on?

4.

What are my treatment options, and what are the benefits and risks of
each?

5.

How long before I might notice improvement?

6.

What can I do for myself?

7.

How will we know if the treatment is working?

8.

What should I do if things get worse?

9.

How should I tell family, school, or my employer, if at all?

10.

What is the long-term outlook?

### Privacy and sharing

You decide who to tell. Many people find it helpful to share with a
few trusted people. In some countries, laws protect you against
discrimination at work or school and allow reasonable adjustments.
Medical records are confidential and are shared only with your
permission or where the law requires.

## 33.9 Labels: helpful and
harmful

Labels can be a source of understanding but also of stigma. Some
people embrace their diagnosis as part of their identity; others prefer
not to. Either choice is valid. A few points to remember:

-

You are **not** your diagnosis. You are a person who
*has* a condition.

-

Avoid using diagnoses as insults or jokes.

-

Do not diagnose friends or family members; leave it to
professionals.

-

Avoid self-diagnosis from social media videos or online lists. Traits
described are often common to everyone, and wrong labels can mislead
people or delay proper care. At the same time, if something strikes you
as familiar, it is entirely reasonable to bring it to a professional for
assessment.

## 33.10 Screening versus
diagnosis

A **screening** tool is a short test that flags people
who may need a full assessment. Screening is not diagnosis. A high score
means “talk to a professional,” not “you have the condition.” Likewise,
a low score does not guarantee you are well if you are worried.

## 33.11 Assessment of
children and young people

Children cannot always describe their feelings in words, so
assessments include:

-

Interviews with parents or carers and the child

-

Information from school

-

Observation of play and behaviour

-

Developmental history from pregnancy and early years

-

Questionnaires for parents and teachers

-

Tests of learning, speech, or cognition when appropriate

Early assessment is valuable because earlier help brings better
results. If you suspect a problem, do not “wait and see” for too
long.

## 33.12 Digital tools and apps

Apps, online screening, and teletherapy can improve access,
especially where services are limited. Use those from reputable health
organisations, and remember that tools support but do not replace a
qualified professional, especially in crisis.

**TRY THIS: KEEP A SYMPTOM DIARY BEFORE YOU GO**

For one to two weeks before your appointment, write each evening:
your mood (0 to 10), hours slept, energy, appetite, main worries, any
unusual experiences, alcohol or other substances, medicines taken, and
what happened that day. Bring the diary. It gives your clinician a much
clearer picture than memory alone.

## Reflection activity

1.

Think of a time you or someone close was given a label (a diagnosis,
a nickname, a “type”). How did it help? How did it hurt?

2.

What three questions would you ask a clinician at a first
assessment?

3.

Which people in your life could you tell about a diagnosis, and how
would you decide?

## Key points to remember

-

Diagnosis rests mainly on a careful interview and observation,
supported by questionnaires, physical checks, and sometimes
psychological tests.

-

Doctors use agreed systems (ICD-11 and DSM-5-TR) so that diagnoses
are consistent.

-

Physical illnesses can mimic mental health conditions, so medical
checks matter.

-

You have the right to ask questions, seek a second opinion, and
decide who to tell.

-

A diagnosis is a guide to help, not a definition of who you are.

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