Evaluation Definition of Mental Disorders by Symptom:

Question 1

Cheniaux

Answer 1

cheniaux had two psychiatrists independently diagnose 100 patients using DSM and ICD criteria, and inter-rater reliability was poor as one diagnosed 26 with DSM criteria and 44 with ICD (other one was 13 DSM and 24 ICD). This poor reliability is a weakness of diagnosis of schizophrenia

Question 2

how does cheniaux affect validity

Answer 2

This affects the validity in a way that the diagnosis of schizophrenia is not legitimate and there is a greater likelihood of misdiagnosis.
3. Criterion validity is when different assessment systems arrive at the same diagnosis for the same patient. It would apply her because a concurrent diagnosis will lead to a greater legitimacy, and it is more likely that the patient has the disorder and can work towards curing it.

Question 3

eval Co-morbidity

Answer 3

• The simultaneous presence of two or more diseases or medical conditions in a patient.
• Is an issue because those who have schizophrenia often have other syndromes, which means that knowing the cause of a disorder is difficult because a particular behaviour may be the result of another syndrome.
• Buckley et al. (2009) concluded that around half of patients with a diagnosis of schizophrenia also have a diagnosis of depression (50%) or substance abuse (47%).
• PTSD also occurred in 29% of cases and OCD in 23%.
• This poses a challenge for the classification and diagnosis of schizophrenia. In terms of diagnosis, there may be a problem in telling the difference between conditions. Classification issues include just classifying one as the other because they occur so commonly together.
• This confusing picture is a weakness of diagnosis and classification.

Question 4

eval case study

Answer 4

• Catatonic schizophrenia: the main feature is almost total immobility for hours at a time, with the patient simply staring blankly into space.
• Paranoid schizophrenia: this type involves delusions of persecution.
• Hebephrenic schizophrenia: this type involves great disorganisation of behaviour including delusions, hallucinations, incoherent speech and large mood swings.

Question 5

Catatonic schizophrenia

Answer 5

the main feature is almost total immobility for hours at a time, with the patient simply staring blankly into space.

Question 6

Paranoid schizophrenia

Answer 6

this type involves delusions of persecution.

Question 7

Hebephrenic schizophrenia:

Answer 7

this type involves great disorganisation of behaviour including delusions, hallucinations, incoherent speech and large mood swings.