Sensory-processing sensitivity and its relation to introversion and emotionality

Area of Science:

• Psychology
• Personality Research

Background:

• High sensory-processing sensitivity (HSP) has been previously confused with or subsumed under personality traits like social introversion and emotionality.
• Previous theorizing has not clearly differentiated HSP from related constructs.

Purpose of the Study:

• To identify the core variable of high sensory-processing sensitivity.
• To demonstrate its independence from social introversion and emotionality.
• To explore distinct subgroups within the highly sensitive population and investigate moderating effects of sensitivity.

Main Methods:

• Conducted 7 studies utilizing diverse samples and measures.
• Developed and validated a 27-item Highly Sensitive Person Scale (HSPS).
• Employed statistical analyses to assess reliability, validity, and identify population clusters.

Main Results:

• Identified a unidimensional core variable of high sensory-processing sensitivity.
• Demonstrated partial independence of HSP from social introversion and emotionality.
• Found two distinct clusters of highly sensitive individuals: one with a history of unhappy childhoods, and a larger group similar to non-HSPs except for sensitivity.
• Sensitivity was found to moderate the relationship between parental environment and reporting an unhappy childhood, particularly in men.
• The 27-item Highly Sensitive Person Scale demonstrated adequate reliability and validity.

Conclusions:

• High sensory-processing sensitivity is a distinct personality trait.
• The Highly Sensitive Person Scale is a reliable and valid measure for assessing this trait.
• Understanding the distinct clusters and moderating effects of HSP can inform future research and interventions.