In general , estimates of construct validity were lower when vali date d against dissimilar constructs , except for instruments measuring impairments in mental functions .
CONCLUSION There is a trend that validation against a similar construct yields higher correlation coefficients than validation against a dissimilar construct .
PURPOSE This paper focuses on the construct validity of instruments measuring impairments in body structures and function in rheumatic disorders .
The objective is : 1 ) to make an inventory of constructs , based on the domains of the International Classification of Functioning , Disabilities and Health problems ( ICF ) , against which instruments measuring impairments in body structures and function were vali date d ; 2 ) to analyse whether validation against a similar construct result ed in higher correlation coefficients than validation against a dissimilar construct .
Grading of tenderness as a source of interrater error in the Ritchie articular index.
To assess the effect of grading of tenderness on the interrater reliability of the Ritchie articular index ( RAI ) , 3 physicians recorded independent joint scores on each of 18 patients , examined in r and om order . Our results indicate that close agreement ( Intraclass Correlation Coefficient = 0.85 ) can be achieved on global RAI scores , and that raters can achieve reasonable agreement ( kappa = 0.40 - 0.59 ) on the absolute presence or absence of tenderness of individual joints . By contrast , interrater agreement hardly exceeds the chance level ( kappa = 0.008 - 0.148 ) when degree of tenderness is independently assessed . The grading system of the RAI may thus be implicated as an important source of the instrument 's interrater error
In general , estimates of construct validity were lower when vali date d against dissimilar constructs , except for instruments measuring impairments in mental functions .
CONCLUSION There is a trend that validation against a similar construct yields higher correlation coefficients than validation against a dissimilar construct .
PURPOSE This paper focuses on the construct validity of instruments measuring impairments in body structures and function in rheumatic disorders .
The objective is : 1 ) to make an inventory of constructs , based on the domains of the International Classification of Functioning , Disabilities and Health problems ( ICF ) , against which instruments measuring impairments in body structures and function were vali date d ; 2 ) to analyse whether validation against a similar construct result ed in higher correlation coefficients than validation against a dissimilar construct .