Abstract

Objectives

The Self-Evaluation of Negative Symptoms Scale (SNS) is a self-report scale that evaluates a patient’s subjective experience on all five domains of the negative symptoms. This study aimed to present the adaptation and validation study of the Turkish version of SNS(SNS-TR).

Methods

Seventy-five patients and 50 controls were recruited for this study. After the approval of the translation, participants were asked to fill out SNS-TR by themselves. They were interviewed with the Brief Negative Symptoms Scale (BNSS), Positive and Negative Syndrome Scale (PANSS), and Calgary Depression Scale for Schizophrenia (CDSS).

Results

SNS-TR showed good internal consistency in the reliability analysis with Cronbach’s alpha= 0.873. Subscale-total score correlation coefficients were significant (p < 0.01). In the validity analyses, the total and subscale scores of SNS-TR showed positive correlations with the total and subscales of BNSS, with only one exception of BNSS lack of distress subscales. The total score of SNS-TR demonstrated a significant correlation with PANSS-total, PANSS-negative subscale, PANSS-general subscale, and CDSS scores. Confirmatory factor analysis showed acceptable values for the five-factor structure, similar to the original version.

Conclusion

To conclude, our study indicates that SNS-TR is an easily applicable self-evaluation tool with good psychometric properties for assessing negative symptoms.

• KEY POINTS

• SNS is a novel and easily applicable self-report scale for examining negative symptoms in schizophrenia patients, allowing them to evaluate their subjective experience on all five domains of the negative symptoms.

• It shows good internal consistency (α= 0.873) which is similar to the original version (α = 0.867).

• Confirmatory factor analysis scores were found in acceptable ranges and SNS-TR confirm the five-factor structure.

• Using this scale in clinical practice would empower both the physician’s examinations and patient participation through treatment and follow-up course.

中文翻译：

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土耳其版阴性症状自我评估量表 (SNS) 的验证

摘要

目标

阴性症状自我评价量表 (SNS) 是一种自我报告量表，用于评估患者在阴性症状的所有五个领域的主观体验。本研究旨在介绍土耳其版 SNS（SNS-TR）的适应和验证研究。

方法

本研究招募了 75 名患者和 50 名对照者。翻译通过后，要求参与者自行填写SNS-TR。他们接受了简短阴性症状量表（BNSS）、阳性和阴性症状量表（PANSS）和卡尔加里精神分裂症抑郁量表（CDSS）的采访。

结果

SNS-TR 在可靠性分析中显示出良好的内部一致性，Cronbach 的 alpha = 0.873。分量表总分相关系数显着（p  < 0.01）。在效度分析中，SNS-TR的总分和子量表得分与BNSS的总分和子量表呈正相关，只有一个例外是BNSS缺乏窘迫子量表。SNS-TR 的总分与 PANSS-total、PANSS-negative 分量表、PANSS-general 分量表和 CDSS 得分显着相关。验证性因素分析显示五因素结构的可接受值，类似于原始版本。

结论

总之，我们的研究表明，SNS-TR 是一种易于应用的自我评估工具，具有良好的心理测量特性，可用于评估阴性症状。

• 关键点

• SNS 是一种新颖且易于应用的自我报告量表，用于检查精神分裂症患者的阴性症状，使他们能够评估他们在所有五个阴性症状领域的主观体验。

• 它显示出良好的内部一致性（α= 0.873），与原始版本（α= 0.867）相似。

• 验证性因素分析得分在可接受的范围内，SNS-TR 证实了五因素结构。

• 在临床实践中使用该量表将增强医生的检查和患者通过治疗和随访过程的参与。