Mental State Examination (MSE)

As with Capacity Assessment, the MSE is a core skill that needs to be mastered by all Mental Health clinicians. It is the basis for all clinical interventions and will aide in determining everything from how you talk & react with a client to what sort of activities might be appropriate at that time.

It is important to understand that the MSE is used to capture a “snapshot” of a persons presentation at the time it is done. In most cases it is essential to complete and MSE on every contact you have with a client.

Judgement about mental state should always consider the developmental level of the person and age-appropriateness of the noted behaviour(s).

A typical MSE includes consideration of the following domains:


A person’s appearance can provide useful clues into their quality of self-care, lifestyle and daily living skills.

  • distinctive features
  • clothing
  • grooming
  • hygiene


As well as noting what a person is actually doing during the examination, attention should also be paid to behaviours typically described as non-verbal communication.  These can reveal much about a person’s emotional state and attitude.

  • facial expression
  • body language and gestures
  • posture
  • eye contact
  • response to the assessment itself
  • rapport and social engagement
  • level of arousal (e.g. calm, agitated)
  • anxious or aggressive behaviour
  • psychomotor activity and movement (e.g. hyperactivity, hypoactivity)
  • unusual features (e.g. tremors, or slowed, repetitive, or involuntary movements)

Mood and affect

It can be useful to conceptualise the relationship between emotional affect and mood as being similar to that between the weather (affect) and the season (mood).  Affect refers to immediate expressions of emotion, while mood refers to emotional experience over a more prolonged period of time.


  • range (e.g. restricted, blunted, flat, expansive)
  • appropriateness (e.g. appropriate, inappropriate, incongruous)
  • stability (e.g. stable, labile)


  • happiness (eg, ecstatic, elevated, lowered, depressed)
  • irritability (e.g. explosive, irritable, calm)
  • stability


Speech can be a particularly revealing feature of a person’s presentation and should be described behaviourally as well as considering its content (see also section on Thoughts).  Unusual speech is sometimes associated with mood and anxiety problems, schizophrenia, and organic pathology.

  • speech rate (e.g. rapid, pressured, reduced tempo)
  • volume (e.g. loud, normal, soft)
  • tonality (e.g. monotonous, tremulous)
  • quantity (e.g. minimal, voluble)
  • ease of conversation


This refers to a person’s current capacity to process information and is important because it is often sensitive (though in young people usually secondary) to mental health problems.

  • level of consciousness (e.g. alert, drowsy, intoxicated, stuporose)
  • orientation to reality (often expressed in regard to time/place/person – e.g. awareness of the time/day/date, where they are, ability to provide personal details)
  • memory functioning (including immediate or short-term memory, and memory for recent and remote information or events)
  • literacy and arithmetic skills
  • visuospatial processing (e.g. copying a diagram, drawing a bicycle)
  • attention and concentration (e.g. observations about level of distractibility, or performance on a mentally effortful task – e.g. counting backwards by 7’s from 100)
  • general knowledge
  • language (e.g. naming objects, following instructions)
  • ability to deal with abstract concepts (e.g. describing conceptual similarity between two things).


A person’s thinking is generally evaluated according to their thought content or nature, and thought form or process.


  • delusions (rigidly held false beliefs not consistent with the person’s background)
  • overvalued ideas (unreasonable belief, e.g. a person with anorexia believing they are overweight)
  • preoccupations
  • depressive thoughts
  • self-harm, suicidal, aggressive or homicidal ideation
  • obsessions (preoccupying and repetitive thoughts about a feared or catastrophic outcome, often indicated by associated compulsive behaviour)
  • anxiety (generalised, i.e. heightened anxiety with no specific referent; or specific, e.g. phobias)


Thought process refers to the formation and coherence of thoughts and is inferred very much through the person’s speech and expression of ideas.

  • highly irrelevant comments (loose associations or derailment)
  • frequent changes of topic (flight of ideas or tangential thinking)
  • excessive vagueness (circumstantial thinking)
  • nonsense words (or word salad)
  • pressured or halted speech (thought racing or blocking)


Screening for perceptual disturbance is critical for detecting serious mental health problems like psychosis (this is relatively rare in young people, though peak onset is between 19 and 22 years), cases of severe anxiety, and mood disorders.  It is also important in trauma or substance abuse.  Perceptual disturbances are typically marked and may be disturbing or frightening.

Dissociative symptoms:

  • derealisation (feeling that the world or one’s surroundings are not real)
  • depersonalisation (feeling detached from oneself)


  • the person perceives things as different to usual, but accepts that they are not real, or that
  • things are perceived differently by others


  • probably the most widely known form of perceptual disturbance
  • hallucinations are indistinguishable by the sufferer from reality
  • can affect all sensory modalities, although auditory hallucinations are the most common
  • in children it is common to experience self-talk or commentary as an internal “voice”
  • command hallucinations (voices telling the person to do something) should be investigated
  • important to note the degree of fear and/or distress associated with the hallucinations

 Insight & Judgement

Insight and judgement is particularly important in triaging psychiatric presentations and making decisions about safety.


  • acknowledgement of a possible mental health problem
  • understanding of possible treatment options and ability to comply with these
  • ability to identify potentially pathological events (e.g. hallucinations, suicidal impulses)


  • refers to a person’s problem-solving ability in a more general sense
  • can be evaluated by exploring recent decision-making or by posing a practical dilemma (e.g. what should you do if you see smoke coming out of a house?)

Click here for an example MSE.

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