TY - JOUR
T1 - Psychometric Properties of the Satisfaction With Life Scale in People With Traumatic Brain, Spinal Cord, or Burn Injury
T2 - A National Institute on Disability, Independent Living, and Rehabilitation Research Model System Study
AU - Amtmann, Dagmar
AU - Bocell, Fraser D.
AU - Bamer, Alyssa
AU - Heinemann, Allen W.
AU - Hoffman, Jeanne M.
AU - Juengst, Shannon B.
AU - Rosenberg, Marta
AU - Schneider, Jeffery C.
AU - Wiechman, Shelley
AU - McMullen, Kara
N1 - Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The contents of this publication were developed in part under grants from the National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR Grant Numbers H133P120002, 90DP0053, 90DP0031, 90SI5006). NIDILRR is a center within the Administration for Community Living and Department of Health and Human Services.
Publisher Copyright:
© The Author(s) 2017.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - This study evaluated the measurement properties of the Satisfaction With Life Scale (SWLS) in a sample of 17,897 people with spinal cord injury (48%, n = 8,566), traumatic brain injury (44%, n = 7,941), and burn injury (8%, n = 1,390), 1 year following injury. We examined measurement invariance across the groups, unidimensionality, local independence, reliability from a classical test and item response theory (IRT) framework, and fit to a unidimensional IRT model. The results support unidimensionality and local independence of the SWLS. Reliability was adequate from a classical test and IRT perspective. IRT analysis found that the SWLS could be improved by using only five response categories rather than seven and by removing the fifth item, “If I could live my life over, I would change almost nothing.” This item functions poorly and reduces instrument reliability. With these revisions, the SWLS is a useful instrument to monitor an important outcome of trauma rehabilitation.
AB - This study evaluated the measurement properties of the Satisfaction With Life Scale (SWLS) in a sample of 17,897 people with spinal cord injury (48%, n = 8,566), traumatic brain injury (44%, n = 7,941), and burn injury (8%, n = 1,390), 1 year following injury. We examined measurement invariance across the groups, unidimensionality, local independence, reliability from a classical test and item response theory (IRT) framework, and fit to a unidimensional IRT model. The results support unidimensionality and local independence of the SWLS. Reliability was adequate from a classical test and IRT perspective. IRT analysis found that the SWLS could be improved by using only five response categories rather than seven and by removing the fifth item, “If I could live my life over, I would change almost nothing.” This item functions poorly and reduces instrument reliability. With these revisions, the SWLS is a useful instrument to monitor an important outcome of trauma rehabilitation.
KW - Satisfaction With Life Scale
KW - burn injury
KW - item response theory
KW - measurement invariance
KW - spinal cord injury
KW - traumatic brain injury
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U2 - 10.1177/1073191117693921
DO - 10.1177/1073191117693921
M3 - Article
C2 - 29214853
AN - SCOPUS:85041567927
SN - 1073-1911
VL - 26
SP - 695
EP - 705
JO - Assessment
JF - Assessment
IS - 4
ER -