Scale Analysis

The Reactivity Scale (RS-24) was developed in 1985 by Kohn and is a brief and appropriate screening tool for assessing reactivity in patients experiencing pain. The scale reflects what is considered a core trait of reactivity—essentially the front-facing expression of nervous system sensitivity.

Purpose

The RS-24 was created to evaluate patients who are more reactive to various types of sensory input, not limited to pain alone.

Scoring of Items

Participants are asked to reflect on the degree to which they experience the pain-related sensation described in each statement. The questionnaire consists of 24 items, rated on a 5-point Likert scale ranging from
1 = Strongly Disagree to
5 = Strongly Agree.

Statistical Analysis

The RS-24 produces a total score by summing the ratings for all items. The score ranges from 24 to 120.
Higher scores indicate:
Greater sensitivity to stimulation
A preference for lower levels of stimulation
Higher distractibility

Validity and Reliability

The scale demonstrates excellent internal consistency, with Cronbach’s α = 0.80.
Reactivity scores are:
Negatively correlated with pain tolerance
Positively correlated with pain ratings
This suggests that individuals with high reactivity endure less pain and report higher pain intensity.

References

Dubreuil, D. L., & Kohn, P. M. (1986). Reactivity and response to pain. Personality and Individual Differences, 7(6), 907–909.