The Numbing Scale: psychometric properties, a preliminary report
Abstract
This study explored the psychometric properties of a new self-report instrument, The Glover Numbing Scale. The scale measures a variety of behaviors reported by individuals experiencing an inability to access feelings other than hostility and rage. The scale was administered to inpatient Vietnam combat veterans with post-traumatic stress disorder (PTSD, n = 323), PTSD diagnosed Veterans Affairs (VA) outpatient and veterans' outreach center veterans (n = 208), two Vietnam veteran noncombat groups (n = 45), two psychiatric noncombat controls (anxiety disorder, n = 40; major depressive disorder, n = 31), and a nonpsychiatric never-in-Vietnam veteran control group (n = 48). Reliability information suggested that the scale was internally consistent with good test-retest correlations. Convergent and discriminant validations were assessed based on the pattern of the scale's correlations with relevant Minnesota Multiphasic Personality Inventory (MMPI) scales. The contrasting pattern of correlations provided by a subgroup of veterans who reported always feeling dead or shut down was highlighted. Principal component analysis resulted in a five factor solution that provided evidence for the scale's factorial validity. Numbing Scale scores...Continue Reading
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