ICCS 2009 Technical Report - IEA

The weighted school participation rate in the student survey after replacement is:S S S Sh i fp j k sfpWGTFAC1 hix WGTFAC2S hijx WGTADJ2S hijx WGTADJ3 S hijkWPRS schools_AR=S S S Sh i fp j k sfpWGTFAC1 hix WGTADJ1S hix WGTFAC2S hijx WGTADJ2S hijx WGTADJ3S hijkThe weighted class participation rate is:S S S Sh i fp j k sfpWGTFAC1 hix WGTFAC2S hijx WGTADJ3S hijkWPRS classes=S S S Sh i fp j k sfpWGTFAC1 hix WGTFAC2S hijx WGTADJ2S hijx WGTADJ3S hijkThe weighted student participation rate is:S S S Sh i fp j k sfpWGTFAC1 hix WGTFAC2S hijx 1 hijkWPRS students=S S S Sh i fp j k sfpWGTFAC1 hix WGTFAC2S hijx WGTADJ3S hijkThe weighted overall participation rate in the student survey before replacement is:WPRS overall_BR= WPRS schools_BRx WPRS classesx WPRS studentsThe weighted overall participation rate in the student survey after replacement is:WPRS overall_AR= WPRS schools_ARx WPRS classesx WPRS studentsOverview of participation rates in the student surveyTable 7.1 displays the unweighted participation rates of all countries in the ICCS studentsurvey. Table 7.2 displays the weighted participation rates of all countries in the ICCS studentsurvey.Unweighted participation rates in the teacher surveyLet op, fp, and np be defined as above, such that the participation status now refers to theteacher survey instead of the student survey, and let n op , n fp , and n np be defined correspondingly.The unweighted school participation rate in the student survey before replacement can then becomputed as:UPRT schools_BR=n opnfp+ n npThe unweighted school participation rate in the student survey after replacement can then becalculated as:UPRT schools_AR=n fpnfp+ n npLet tfp be the set of eligible and participating teachers in schools that constitute fp, tnp be theset of eligible but non-participating teachers in schools that constitute fp, and let t tfp and t tnp bethe number of teachers in the respective groups. The unweighted teacher response rate can thenbe defined as:UPRT teachers=t tfpttfp+ t tnpSAMPLING WEIGHTS AND PARTICIPATION RATES77