The Suicidal Ideation Attributes Scale (SIDAS) and the Suicidal Behaviors Questionnaire-Revised (SBQ-R) are widely used psychological instruments for assessing people‘s suicidal ideation and suicidal behavior. The aim of this study was to examine the psychometric characteristics of the Lithuanian versions of the SIDAS and SBQ-R. We analysed data collected from four samples: a Lithuanian general population quota sample based on age, gender and place of residence (N = 697, 52.9% women, aged 18–79 years); a sample of students (N = 2013, 72 % women, aged 18–29 years); a clinical sample of suicidal patients (N = 35, 77.1% women, aged 18–59 years); and a test-retest sample of students who completed the instruments twice within a two-week period (N = 54, 70.4% women, aged 18–47 years). The participants answered questions on gender, and age and completed the SIDAS and SBQ-R. The data analysis revealed that the Lithuanian versions of the SIDAS and SBQ-R have good internal consistency, temporal stability, construct, convergent, and criterion validity. The Lithuanian versions of the SIDAS and SBQ-R can be used to measure suicidality in research settings, as well as in clinical work as auxiliary tools.
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