TY - JOUR
T1 - Construct validation of the supports intensity scale - Children and adult versions
T2 - An application of a pseudo multitrait-multimethod approach
AU - Seo, Hyojeong
AU - Shogren, Karrie A.
AU - Little, Todd D.
AU - Thompson, James R.
AU - Wehmeyer, Michael L.
N1 - Publisher Copyright:
© AAIDD.
PY - 2016/11
Y1 - 2016/11
N2 - This study examined the convergent validity of the Supports Intensity Scale - Adult Version (SIS-A; Thompson et al., 2015a) and Supports Intensity Scale - Children's Version (SIS-C; Thompson et al., 2016a). Data from SISOnline (n = 129,864) for the SIS-A and from the SIS-C standardization sample (n = 4,015) were used for analyses. Using a pseudo multitrait-multimethod model, we estimated observed support needs scores as shared trait (support needs concept) and method (type, frequency, and daily support time) variances. Overall, trait variances more strongly influenced support needs scores than method variances, supporting the convergent validity of both versions of SIS. Findings also suggested that each of three methods of measuring support needs uniquely contributed to observed support needs ratings although different patterns existed between the SIS-A and SIS-C.
AB - This study examined the convergent validity of the Supports Intensity Scale - Adult Version (SIS-A; Thompson et al., 2015a) and Supports Intensity Scale - Children's Version (SIS-C; Thompson et al., 2016a). Data from SISOnline (n = 129,864) for the SIS-A and from the SIS-C standardization sample (n = 4,015) were used for analyses. Using a pseudo multitrait-multimethod model, we estimated observed support needs scores as shared trait (support needs concept) and method (type, frequency, and daily support time) variances. Overall, trait variances more strongly influenced support needs scores than method variances, supporting the convergent validity of both versions of SIS. Findings also suggested that each of three methods of measuring support needs uniquely contributed to observed support needs ratings although different patterns existed between the SIS-A and SIS-C.
KW - Convergent validity
KW - Multitrait-multimethod model
KW - Supports Intensity Scale - Adult Version
KW - Supports Intensity Scale - Children's Version
UR - http://www.scopus.com/inward/record.url?scp=85018775384&partnerID=8YFLogxK
U2 - 10.1352/1944-7558-121.6.550
DO - 10.1352/1944-7558-121.6.550
M3 - Article
C2 - 27802098
AN - SCOPUS:85018775384
SN - 1944-7515
VL - 121
SP - 550
EP - 563
JO - American Journal on Intellectual and Developmental Disabilities
JF - American Journal on Intellectual and Developmental Disabilities
IS - 6
ER -