A shortened psychophysical task to quantify irritability: the Reactive Irritability Scale II (RIS-II)

Area of Science:

• Psychology
• Psychophysics

Background:

• The original Reactive Irritability Scale (RIS) effectively measures irritability using magnitude estimation but is time-consuming.
• A shortened version is needed for practical application in research and clinical settings.

Purpose of the Study:

• To develop and validate a shortened version of the RIS, termed RIS-II.
• To assess the reliability and utility of RIS-II in diverse populations and conditions.

Main Methods:

• Study 1: Assessed test-retest reliability and correlation with the original RIS.
• Study 2: Evaluated RIS-II in subjects experiencing psychological stress and various interventions (relaxation, music, cognitive tasks, silence).
• Study 3: Administered RIS-II to chronic pain patients and healthy controls, examining responses to sound stimuli.

Main Results:

• RIS-II demonstrated robust test-retest reliability and strong correlation with the original RIS.
• Progressive relaxation significantly increased irritability in stressed subjects.
• Chronic pain patients showed altered irritability responses to sounds, with repeated reference sound exposure increasing irritability.

Conclusions:

• RIS-II is a reliable and valid instrument for measuring irritability in laboratory and clinical settings.
• The scale is understandable across diverse age, educational, and cultural backgrounds.
• RIS-II shows utility in assessing irritability in healthy individuals and those with chronic medical conditions.