What does the schizophrenic spectrum and related psychotic disorders look like? - Chapter 7 (Abnormal Psychology)

A person suffers from psychosis if he has hallucinations and delusions and can not say with certainty whether his observations are real or not. A form of psychosis that often occurs is schizophrenia. People can sometimes think very clearly and function well, but also have moments when they can no longer take care of themselves.

Schizophrenia occurs in 1 to 2 percent of people in the United States and in 0.5 to 1 percent of all people around the world. Schizophrenia is more common in men than women and is more common in colored people than in whites. About 90% of people with schizophrenia seek help. The disorder often develops in youth or young adulthood.

Symptoms of schizophrenia

Schizophrenia is a very complex disorder. A distinction is made between two categories of symptoms, the positive and the negative symptoms. The DSM-V refers to the schizophrenia spectrum, to show that there are five domains of symptoms that define psychotic disorders, and their number, severity and duration distinguish psychotic disorders from each other.

Positive symptoms

Positive symptoms, or Type I symptoms, are characterized by the presence of delusions, hallucinations, disorganized speech and thoughts and disorganized or catatonic behavior. These symptoms can also occur in other disorders, such as bipolar disorder, so that makes the diagnosis for schizophrenia difficult. It is also possible that the symptoms occur in people who actually have no problems. Think of people who hear voices and attribute this to their religion. There are also people who, due to the symptoms, have no control over reality: delusional disorder (delusions).

The rule is that if the positive symptoms only occur during a manic or depressive period, the diagnosis 'mood disorder with psychotic characteristics' is made. If the positive symptoms also occur outside the manic or depressive periods, the diagnosis is made schizophrenia.

Delusions are ideas that the patient thinks are true, while those ideas are very unlikely or even impossible. Many people sometimes have unlikely thoughts, but there are differences between these kinds of thoughts and delusions. When healthy people have unlikely thoughts, they are not completely unbelievable, while delusions are. People with delusions constantly think about it and seek evidence for their ideas, with which they try to convince others. In addition, people with delusions can not accept that their thoughts are not right.

There are four

... Interested? Read the instructions below in order to read the full content of this page.

Access options

The full content is only visible for JoHo members.

  • For information about international JoHo memberships, read more here.
  • Are you already a member? Add your JoHo membership number to your World Supporter account to activate your increased member access
  • or mail info@joho.org


For Dutch visitors

Toegang tot pagina of document:

Word JoHo donateur of abonnee voor online toegang

  • Om online toegang te krijgen kun je JoHo donateur worden
  • Lees hieronder meer over JoHo donateur en abonnee worden

Je bent al donateur, maar je hebt geen toegang?

  • Log in, of maak een account aan als je dat nog niet eerder hebt gedaan.
  • Voeg je JoHo (member) nummer toe aan je account voor volledige toegang. Je kunt dit nummer vinden op JoHo.org/user of in de bevestigingsmail van je JoHo donateursinschrijving. Kom je er niet uit, neem dan even contact op!

Kom je er niet helemaal uit of heb je problemen met inloggen?


Korte advieswijzer JoHo services

JoHo donateur (= €5 per kalenderjaar):

  • Voor wie JoHo wil steunen
  • Voor wie toegang wil tot de (service)abonnementen
  • Voor wie van basiskortingen gebruik wil maken

JoHo donateur + service-abonnement I (= €5 + 10 per kalenderjaar):

  • Voor wie basistoegang wil tot de online JoHo's en boeksamenvattingen
  • Voor wie gebruik wil maken van de vacatureservice en bijbehorende keuzehulp & advieswijzers
  • Voor wie gebruik wil maken van keuzehulp en advies wil bij werk in het buitenland, lange reizen, vrijwilligerswerk, stages en studie in het buitenland

JoHo donateur met een doorlopende verzekering

  • Sluit je via JoHo een jaarlijks doorlopende verzekering af, dan kan je gedurende de looptijd van je verzekering gebruikmaken van de voordelen van service-abonnement III: hoge kortingen + volledig online toegang + alle extra services. Lees meer


Steun JoHo en steun jezelf door JoHo donateur te worden

Direct Donateur Worden




Summaries & Study Note of esteban12321
Join World Supporter
Join World Supporter
Log in or create your free account

Why create an account?

  • Your WorldSupporter account gives you access to all functionalities of the platform
  • Once you are logged in, you can:
    • Save pages to your favorites
    • Give feedback or share contributions
    • participate in discussions
    • share your own contributions through the 11 WorldSupporter tools
Selected Categories
Access level of this page
  • Public
  • WorldSupporters only
  • JoHo members
  • Private
Main Category
Learn & Develop
Country / Region
Year of Study
Language of your text