Graded response model analyses of the Suicidal ABC Scale and the Suicidal Behaviors Questionnaire-Revised.

N = 1,720; WTD = wish to die; WTLr = wish to live reverse-scored; Ideation = suicidal ideation; Prediction = prediction of suicide attempts; Debate = internal suicidal debate; Behaviors = history of suicidal behaviors (SABCS uses SBM scoring; SBQ-R uses Osman et al. scoring [34]); Comm. = communication of suicidality; a = item discrimination level; bL = lowest item difficulty threshold; bU = upper item difficulty threshold; IF = information function; Pct. = percentage of total scale information. Graded response model analyses of the Suicidal ABC Scale and the Suicidal Behaviors Questionnaire-Revised.