Parker et al (2001)

Parker, Cheah & Roy (2001)  carried out a study to determine the extent to which symptoms of Major Depressive Disorder differed between Chinese and Australian patients. You can use this study for the following learning objectives:

Examine the concepts of normality and abnormality.

Discuss cultural considerations in diagnosis.

Discuss cultural variations in the prevalence of disorders.

The original study is available here.

One of the questions of psychology is whether psychological disorders are universal.  Early clinicians argued that since certain symptoms were not observed in different cultures, that the disorder was not universal.  More modern research argues that the disorders may be universal, but that their symptoms may not be.  As early as 1986, Kleinman found that the Chinese tended to somaticize the symptoms of depression - that is, they reported bodily symptoms such as headaches, insomnia and back pain, rather than affective symptoms such as sadness or pessimism.  Researchers have argued that this may be due to cultural dimensions; in collectivistic societies it is less appropriate to reveal one's emotions, so perhaps the somaticization is the way that they communicate mental distress. Others argue that it may be because of the stigma associated with mental illness in Chinese society that leads people to express "appropriate symptoms."

However, some research shows that somaticization is also common in Western societies. Psychologists use the term corporization for this phenomenon - that patients are more likely to seek help response to physical problems, than psychological ones.

The study by Parker et al was carried out almost 20 years later and found similar results to Kleinman's original study.

Aim

To compare the extent to which depressed Chinese patients in Malaysia and Caucasian patients in Australia identified both cognitive aspects of depression and a range of somatic symptoms as a sign of their depression and the reason that they sought professional help. 
 

Procedure

The sample was made up of 50 Malaysian participants of Chinese heritage and 50 Australian participants of Caucasian, Western heritage. Whereas the Australians all had English as their first language, the Chinese were mix of Chinese (80%) and English (20%) as their first language. All participants were out-patients who had been diagnosed with Major Depressive Disorder, but who did not have other diagnoses as well, such as drug addiction or schizophrenia.

The questionnaire was based on two sets of symptoms.  First, a set of mood and cognitive items common in Western diagnostic tools for depression. Secondly, a set of somatic symptoms commonly observed by Singaporean psychiatrists. The questionnaire was translated into Malay and Mandarin Chinese.  It was back-translated to establish credibility.

The patients were asked to judge the extent to which they had experienced each of the 39 symptoms in the last week. They had only four options: all the time, most of the time, some of the time and not at all. They were also asked to rank the symptoms that they experienced in order of how distressing they were. Through the assistance of their psychiatrists, it was also noted what the primary symptom was that led to them seeking help.

Results

When looking at which symptom led them to actually seek help, 60% of the Chinese participants identified a somatic symptom, compared to only 13% of the Australian sample.

Below you can see how each culture ranked the various symptoms in terms of the amount of distress they cause.

However, when comparing the lists of which symptoms each group acknowledged experiencing, something rather interesting happened.  There was no significant difference in the number of somatic symptoms indicated by each group as being linked to their depression.  However, the Chinese participants were significantly less likely to identify cognitive or emotional symptoms as part of their problem. They were less likely to rate feeling helpless and hopeless, a depressed mood, having poor concentration, or having thoughts of death than the Australian participants. The role of culture is evident here; in Western culture it is more appropriate to discuss one's emotions and depression is seen as linked to a lack of emotional well being; whereas in Chinese culture, it is less appropriate and even stigmatized if one speaks about a lack of emotional health.

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