A construct validity study of a Differentiation of Self Scale

Area of Science:

• Psychology
• Family Studies
• Nursing

Background:

• Differentiation of self is a core concept in Bowen Theory, crucial for understanding individual and family functioning.
• Existing measures may not fully capture the nuances of this construct.
• The Haber Level of Differentiation of Self Scale (LDSS) was developed to address this gap.

Purpose of the Study:

• To establish the construct validity and reliability of the Haber Level of Differentiation of Self Scale (LDSS).
• To refine the LDSS into a unidimensional instrument for measuring differentiation of self.
• To assess the scale's utility in various healthcare settings.

Main Methods:

• Stage one involved factor analysis and correlational analysis of a 32-item LDSS administered to 372 subjects.
• The scale was revised to a 24-item unidimensional version based on initial findings.
• Stage two involved administering the revised 24-item LDSS along with other psychological inventories to 372 subjects.

Main Results:

• Factor analysis supported a 24-item unidimensional structure over a 32-item two-subscale model.
• The revised 24-item LDSS demonstrated strong internal consistency (coefficient alpha = .90).
• Significant negative correlations were found between differentiation of self and trait anxiety, state anxiety, psychological dysfunction, and negative impact stress (p < .01).

Conclusions:

• The 24-item LDSS is a valid and reliable unidimensional tool for assessing differentiation of self.
• The LDSS is suitable for use by nurses and other healthcare professionals.
• This scale aids in evaluating individual and family functioning across diverse healthcare contexts.