Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet, Solna, Sweden.
Department of Public Health Sciences, Stockholm University, Stockholm, Sweden.
Int J Methods Psychiatr Res. 2024 Mar;33(1):e2018. doi: 10.1002/mpr.2018.
The Gambling Disorder Identification Test (GDIT) is a recently developed self-report measure. The GDIT includes items with multiple response options that are either based on frequency or time, and item response theory evaluations of these could yield vital knowledge on its measurement performance.
The GDIT was evaluated using Rasch analysis in a study involving 597 Swedish gamblers.
In a three-dimensional Rasch model, the item response difficulty range extended from -1.88 to 4.06 and increased with higher time- and frequency-based responses. Differential item functioning showed that some GDIT items displayed age and gender-related differences. Additionally, person-separation reliability indicated the GDIT could reliably be divided into three to four diagnostic levels.
The frequency- and time-based item response options of the GDIT offer excellent measurement, allowing for elaborate assessment across both lower and higher gambling severity. The GDIT can be used to detect DSM-5 Gambling Disorder, thereby holding significance from both epidemiological and clinical standpoints. Notably, the 3-item GDIT Gambling Behavior subscale also shows potential as a brief screening tool for identifying at-risk gambling behavior.
赌博障碍识别测试（GDIT）是一种新开发的自我报告测量工具。GDIT 包含基于频率或时间的多项选择项目，对这些项目的项目反应理论评估可以为其测量性能提供重要的知识。
在一项涉及 597 名瑞典赌徒的研究中，使用 RASCH 分析对 GDIT 进行了评估。
在三维 RASCH 模型中，项目反应难度范围从-1.88 到 4.06，并且随着基于时间和频率的更高响应而增加。差异项目功能显示，一些 GDIT 项目显示出与年龄和性别相关的差异。此外，个体分离可靠性表明，GDIT 可以可靠地分为三到四个诊断水平。
GDIT 的基于频率和时间的项目反应选项提供了极好的测量，允许在较低和较高的赌博严重程度上进行精细评估。GDIT 可用于检测 DSM-5 赌博障碍，因此从流行病学和临床角度来看都具有重要意义。值得注意的是，3 项 GDIT 赌博行为分量表也有可能成为识别高危赌博行为的简短筛查工具。
