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Original ArticleOpen Access
Cross-Cultural Validation and Inter-Rater Reliability of the Personal and Social Performance Scale, Thai Version
Srisurapanont M 
,
Arunpongpaisal S ,
Chuntaruchikapong S ,
Silpakit C ,
Khuangsirikul V ,
Karnjanathanalers N ,
Samanwongthai U
,
Arunpongpaisal S ,
Chuntaruchikapong S ,
Silpakit C ,
Khuangsirikul V ,
Karnjanathanalers N ,
Samanwongthai U Objective: To cross-culturally validate and examine the inter-rater reliability of the Personal and Social
Performance scale (PSP), Thai version (Thai-PSP).
Material and Method: The authors translated, back translated, and conducted a panel review on the source,
translated, and back translated version of the PSP. After nine psychiatrists, who were new to the PSP or the
Thai-PSP, had received a three-hour session of training, they jointly watched four tape-recorded interviews
and used the Thai-PSP for independent rating of the patients’ functioning.
Results: The score ranges for items 1 (socially useful activities), 2 (personal/social relationships), and 3 (selfcare)
were between 0 (absent) and 4 (severe). The score range was between 0 (absent) and 3 (marked) for item
4 (disturbing /aggressive behavior). The total scores of four patients were rated between 2 (21-30 points) and
8 (81-90 points). The intraclass correlation coefficients (95% confidence intervals) of each item and total
score were as follows: 0.63 (0.28-0.96) for item 1, 0.75 (0.42-0.98) for item 2, 0.69 (0.35-0.97) for item 3, 0.52
(0.17-0.94) for item 4, and 0.75 (0.41-0.98) for the total score.
Conclusion: The results of the present study confirm the reliability of PSP and Thai-PSP, as well as the ease of
training.
Keywords: Schizophrenia, Functioning, reliability, Intraclass correlation coefficient
Performance scale (PSP), Thai version (Thai-PSP).
Material and Method: The authors translated, back translated, and conducted a panel review on the source,
translated, and back translated version of the PSP. After nine psychiatrists, who were new to the PSP or the
Thai-PSP, had received a three-hour session of training, they jointly watched four tape-recorded interviews
and used the Thai-PSP for independent rating of the patients’ functioning.
Results: The score ranges for items 1 (socially useful activities), 2 (personal/social relationships), and 3 (selfcare)
were between 0 (absent) and 4 (severe). The score range was between 0 (absent) and 3 (marked) for item
4 (disturbing /aggressive behavior). The total scores of four patients were rated between 2 (21-30 points) and
8 (81-90 points). The intraclass correlation coefficients (95% confidence intervals) of each item and total
score were as follows: 0.63 (0.28-0.96) for item 1, 0.75 (0.42-0.98) for item 2, 0.69 (0.35-0.97) for item 3, 0.52
(0.17-0.94) for item 4, and 0.75 (0.41-0.98) for the total score.
Conclusion: The results of the present study confirm the reliability of PSP and Thai-PSP, as well as the ease of
training.
Keywords: Schizophrenia, Functioning, reliability, Intraclass correlation coefficient
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