What is Alogia?


In psychology, alogia (from Greek ἀ-, “without”, and λόγος, “speech” + New Latin -ia) is poor thinking inferred from speech and language usage.

There may be a general lack of additional, unprompted content seen in normal speech, so replies to questions may be brief and concrete, with less spontaneous speech. This is termed poverty of speech or laconic speech. The amount of speech may be normal but conveys little information because it is vague, empty, stereotyped, overconcrete, overabstract, or repetitive. This is termed poverty of content or poverty of content of speech. Under Scale for the Assessment of Negative Symptoms (SANS) used in clinical research, thought blocking is considered a part of alogia, and so is increased latency in response.

This condition is associated with schizophrenia, dementia, severe depression, and autism. As a symptom, it is commonly seen in patients suffering from schizophrenia and schizotypal personality disorder, and is traditionally considered a negative symptom. It can complicate psychotherapy severely because of the considerable difficulty in holding a fluent conversation.

The alternative meaning of alogia is inability to speak because of dysfunction in the central nervous system, found in mental deficiency and dementia. In this sense, the word is synonymous with aphasia, and in less severe form, it is sometimes called dyslogia.


Alogia may be on a continuum with normal behaviours. People without mental illness may have it occasionally including when fatigued or disinhibited, when writers use language creatively, when people in certain disciplines – such as politicians, administrators, philosophers, ministers, and scientists – use language pedantically, or in people with intelligence or little education. Hence, deciding if an individual has alogia depends on contextual clues. Is the person in control? Can the person moderate the effect if asked to be specific or concise? Is it better with another topic? Are there other significant symptoms?

Alogia is characterised by a lack of speech, often caused by a disruption in the thought process. Usually, an injury to the left side of the brain may cause alogia to appear in an individual. While in conversation, alogic patients will reply very sparsely and their answers to questions will lack spontaneous content; sometimes, they will even fail to answer at all. Their responses will be brief, generally only appearing as a response to a question or prompt.

Apart from the lack of content in a reply, the manner in which the person delivers the reply is affected as well. Patients affected by alogia will often slur their responses, and not pronounce the consonants as clearly as usual. The few words spoken usually trail off into a whisper, or are just ended by the second syllable. Studies have shown a correlation between alogic ratings in individuals and the amount and duration of pauses in their speech when responding to a series of questions posed by the researcher. The inability to speak stems from a deeper mental inability that causes alogic patients to have difficulty grasping the right words mentally, as well as formulating their thoughts. A study investigating alogiacs and their results on the category fluency task showed that people with schizophrenia who exhibit alogia display a more disorganised semantic memory than controls. While both groups produced the same number of words, the words produced by people with schizophrenia were much more disorderly and the results of cluster analysis revealed bizarre coherence in the alogiac group.

If the condition is assessed using a language other than the individual’s primary language, the medical professional needs to make sure that the problem is not from language barriers.

This condition is associated with schizophrenia, dementia, and severe depression.


The following table shows an example of “poverty of speech” which shows replies to questions that are brief and concrete, with a reduction in spontaneous speech:

Poverty of SpeechNormal Speech
Q: Do you have any children?
A: Yes.
Q: Do you have any children?
A: Yes, a boy and a girl.
Q: How many?
A: Two.
Q: How old are they?
A: Edmond is sixteen and Alice is six.
Q: How old are they?
A: Six and sixteen.
Q: Are they boys or girls?
A: One of each.
Q: Who is the sixteen-year-old?
A: The boy.
Q: What is his name?
A: Edmond.
Q: And the girl’s?
A: Alice.

The following example of “poverty of content of speech” is a response from a patient when asked why he was in a hospital. Speech is vague, conveys little information, but is not grossly incoherent and the amount of speech is not reduced. “I often contemplate—it is a general stance of the world—it is a tendency which varies from time to time—it defines things more than others—it is in the nature of habit—this is what I would like to say to explain everything.”


Alogia can be brought on by frontostriatal dysfunction which causes degradation of the semantic store, the centre located in the temporal lobe that processes meaning in language. A subgroup of chronic schizophrenia patients in a word generation experiment generated fewer words than the unaffected subjects and had limited lexicons, evidence of the weakening of the semantic store. Another study found that when given the task of naming items in a category, schizophrenia patients displayed a great struggle but improved significantly when experimenters employed a second stimulus to guide behaviour unconsciously. This conclusion was similar to results produced from patients with Huntington’s and Parkinson’s disease, ailments which also involve frontostriatal dysfunction.


Medical studies conclude that certain adjunctive drugs effectively palliate the negative symptoms of schizophrenia, mainly alogia. In one study, Maprotiline produced the greatest reduction in alogia symptoms with severity reduction in 50% of patients (out of 10). Of the negative symptoms of schizophrenia, alogia had the second best responsiveness to the drugs, surpassed only by attention deficiency. D-amphetamine is another drug that has been tested on people with schizophrenia and found success in alleviating negative symptoms. This treatment, however, has not been developed greatly as it seems to have adverse effects on other aspects of schizophrenia such as increasing the severity of positive symptoms.

Relation to Schizophrenia

Although alogia is found as a symptom in a variety of health disorders, it is most commonly found as a negative symptom of schizophrenia.

Previous studies and analyses conclude that at least three factors are needed to cover both the positive and negative symptoms of schizophrenia; the three are: psychotic, disorganization, and negative symptom factors. Studies suggest that an inappropriate affect is strongly associated with bizarre behaviour and positive formal thought disorder on a disorganisation factor; attention impairment correlates significantly with psychotic, disorganization, and negative symptom factors. Alogia contains both positive and negative symptoms, with the poverty of content of speech as the disorganization factor, and poverty of speech, response latency, and thought blocking as the negative symptom factors.

Alogia is a major diagnostic sign of schizophrenia, when organic mental disorders have been excluded.

In schizophrenia, negative symptoms including flattening of affect, avolition, and alogia are responsible for the considerable morbidity of the disease compared with other psychotic disorders. Negative symptoms are common in the prodromal and residual phases of the disease and can be severe. During the first year, negative symptoms can progress, especially alogia, which may start off from a relatively low rate. Within 2 years, up to 25% of patients will have significant negative symptoms. Psychotic symptoms tend to diminish as the individuals age, but negative symptoms tend to persist. Prominent negative symptoms at disease onset, including alogia, are good predictors of worse outcomes.

Negative symptoms can arise in the presence of other psychiatric symptoms. Positive symptoms are a common cause of apathy, social withdrawal, and alogia. Secondary causes of negative symptoms, such as depression and demoralisation, often remit within a year, which helps distinguishing them from primary negative symptoms. Symptoms that don’t diminish over a year with medications should be reconsidered as possible primary negative symptoms.

Overcoming Communication Difficulties

Communicating with People from Different Cultures

Any successful communication recognises the uniqueness of every culture, every relationship, and every individual – including you.

Some forms of verbal and non-verbal communication are appropriate and others are not appropriate. For instance, some individuals may regard prolonged eye contact as rude. We all have different ways of communicating our fears and needs when we become unwell. Invite the person to tell you about their life experiences, values, and belief systems. Also, ask them how they feel about asking for care and support.

Establish what is realistic for the individual, as well as what is culturally acceptable. Some cultures encourage the use of silence, whereas in others it creates embarrassment or awkwardness. In the French, Spanish, and Eastern European cultures, the presence of silence is a sign of agreement.

Working with an Interpreter or a Bilingual Worker

When an individual does not speak English at all, has limited English, or chooses to communicate their distress in their mother tongue, the best solution is to use a professional interpreter. The choice to use a trained interpreter or a family member must be made by the individual who is experiencing problems. Being able to do so will help the individual to fell that they are in control of the situation.

Language holds and creates the individual’s reality, experience, culture, and world view. A good interpreter will concentrate on accurately conveying equivalent meaning as well as reporting the direct answers to your questions and other responses offered. You should also be aware that the interpreter may bring their own bias to the situation.

Working with a British Sign Language Interpreter for the Deaf

There are very few services available for deaf people with mental health problems, although recently some deaf workers have been trained in mental health first aid.

If no deaf mental health first-aider is available, you may need to use an interpreter. In this case, you should take care to always face the deaf person when speaking and respond as though it is the deaf person speaking to you when the interpreter speaks. Remember that the interpreter is being the deaf person’s voice. Maintain good eye contact and show your feelings through your facial expressions. Deaf people do much of their communication through body language and facial expression, and are therefore skilled at reading feelings.

If no interpreter is available, you can still offer support and concern by showing your willingness to communicate. Deaf people can often lip read and can vocalise using English. Be patient and try hard to understand. Show your concern as you would with anyone in distress and ask the person who you can call for help.

Important Note

If you need to use a pen and paper to ask the person who they would like you to call for help or support, use very simple English.

British Sign Language is a different language to English – a person who was born deaf may not have English as their first language.