/* Affichage des estimations des difficultés modèle A */
di _col(5) as text "{ul:MODEL A:} Overall measurement non-invariance between groups"
di
di %~85s as text "Item difficulties: estimates (s.e.)"
di _col(10) "{hline 65}"
di _col(31) as text abbrev("`gp'",20) "=0" _col(57) abbrev("`gp'",20) "=1"
di _col(10) "{hline 65}"
forvalues j=1/`nbitems' {
di as text _col(10) abbrev("``j''", 18)
forvalues p=1/`nbdif_`j'' {
di as text _col(10) "`p'" as result _col(30) %6.2f `delta`j'_`p'g0mA' %6.2f " (" %3.2f `delta`j'_`p'g0mA_se' ")" _col(56) %6.2f `delta`j'_`p'g1mA' " (" %3.2f `delta`j'_`p'g1mA_se' ")"
}
}
di as text _col(10) "{hline 65}"
/* Affichage des estimations sur le trait latent du modèle A */
di
di %~85s as text "Latent trait distribution"
di _col(10) "{hline 65}"
di _col(31) "Estimate" _col(57) "Standard error"
di _col(10) "{hline 65}"
di _col(10) "Variance" as result _col(31) %6.2f `=var_mA[1,1]' _col(55) %6.2f `=var_mA[2,1]'
di _col(10) as text "Group effect" as result _col(31) "0 (constrained)"
di _col(10) as text "{hline 65}"
di
di _col(10) as text "No group effect: equality of the latent trait means between groups"
di _col(10) as text "All item difficulties are freely estimated in both groups"
di
}
//*Affichage modèle B
di
di as input "PROCESSING STEP B"
di
/* Affichage des estimations des difficultés modèle B */
if "`detail'" != "" {
di _col(5) as text "{ul:MODEL B:} Overall measurement invariance between groups"
di
di %~85s as text "Item difficulties: estimates (s.e.)"
di _col(10) "{hline 65}"
di _col(31) abbrev("`gp'",20) "=0" _col(57) abbrev("`gp'",20) "=1"
di _col(10) "{hline 65}"
forvalues j=1/`nbitems' {
di _col(10) as text "``j''"
forvalues p=1/`nbdif_`j'' {
di as text _col(10) "`p'" as result _col(30) %6.2f `delta`j'_`p'g0mB' " (" %3.2f `delta`j'_`p'g0mB_se' ")" _col(56) %6.2f `delta`j'_`p'g1mB' " (" %3.2f `delta`j'_`p'g1mB_se' ")"
}
}
di _col(10) as text "{hline 65}"
/* Affichage des estimations sur le trait latent du modèle B */
di
di %~85s as text "Latent trait distribution"
di _col(10) "{hline 65}"
di _col(28) "Estimate" _col(42) "Standard error" _col(62) "P-value"
di _col(10) "{hline 65}"
di _col(10) "Variance" as result _col(28) %6.2f `=var_mB[1,1]' _col(40) %6.2f `=var_mB[2,1]'
di _col(10) as text "Group effect" as result _col(28) %6.2f `geffmB' _col(40) %6.2f `segeffmB' _col(62) %6.4f `gcmBp'
di _col(10) as text "{hline 65}"
di
di _col(10) as text "Group effect estimated: mean of the latent trait of group 1 freely estimated"
di _col(10) "Equality of the item difficulties between groups"
di _col(10) as text "Chi-square" _col(28) "DF" _col(40) "P-value"
di _col(10) as result %6.2f `diftestchi' _col(28) %2.0f `diftestdf' _col(40) %6.4f `diftestp'
di _col(10) as text "{hline 40}"
di
if `diftestp'<0.05{
di as result "DIFFERENCE IN ITEM DIFFICULTIES BETWEEN GROUPS LIKELY"
}
else{
di as result "NO DIFFERENCE BETWEEN GROUPS DETECTED"
}
*********************************
*********************************
*************MODEL C*************
*************MODEL C*************
*********************************
*********************************
@ -787,15 +894,12 @@ if "`group'"!="" & "`nodif'"=="" { // PARTIE 1 = Slmt si option group & pas de "
local nbsig=0
local nbsig=0
local minpval=1
local minpval=1
local itemdif=0
local itemdif=0
if "`detail'" != ""{
di as text "Loop `boucle'"
di as text "Loop `boucle'"
di as text _col(5) "Adjusted alpha: " %6.4f `pajust'
di as text _col(5) "Adjusted alpha: " %6.4f `pajust'
di
di
di as text _col(10) "{hline 65}"
di as text _col(10) "{hline 65}"
di as text _col(10) "Freed item" _col(31) "Chi-Square" _col(48) "DF" _col(57) "P-Value"
di as text _col(10) "Freed item" _col(31) "Chi-Square" _col(48) "DF" _col(57) "P-Value"
di as text _col(10) "{hline 65}"
di as text _col(10) "{hline 65}"
}
/*boucle de test*/
/*boucle de test*/
forvalues j=1/`nbitems'{
forvalues j=1/`nbitems'{
//if `nbdif_`j'' > 2 {
//if `nbdif_`j'' > 2 {
@ -856,40 +960,32 @@ if "`group'"!="" & "`nodif'"=="" { // PARTIE 1 = Slmt si option group & pas de "
local itemdif=`j'
local itemdif=`j'
}
}
}
}
if "`detail'" != "" {
di as text _col(10) abbrev("``j''",15) as result _col(31) %6.3f test_dif_`boucle'[`j',1] _col(48) test_dif_`boucle'[`j',2] _col(57) %6.4f test_dif_`boucle'[`j',3]
di as text _col(10) abbrev("``j''",15) as result _col(31) %6.3f test_dif_`boucle'[`j',1] _col(48) test_dif_`boucle'[`j',2] _col(57) %6.4f test_dif_`boucle'[`j',3]
}
}
}
}
}
/*si nb de tests significatifs=0, on arrête*/
/*si nb de tests significatifs=0, on arrête*/
if `nbsig'==0{
if `nbsig'==0{
local stop=1
local stop=1
if `boucle' == 1 {
if `boucle' == 1 {
if "`detail'" != "" {
di as text _col(10) "{hline 65}"
di as text _col(10) "{hline 65}"
di
di
di as result "No significant test: no difference between groups detected, no DIF detected"
di as result "No significant test: no difference between groups detected, no DIF detected"
di
di
}
}
}
else {
else {
if "`detail'" != ""{
di as text _col(10) "{hline 65}"
di as text _col(10) "{hline 65}"
di
di
di as result "No other significant tests"
di as result "No other significant tests"
di
di
}
}
}
}
}
else{/*si nb de tests significatifs>0, mise à jour de la matrice de résultats*/
else{/*si nb de tests significatifs>0, mise à jour de la matrice de résultats*/
matrix dif_rc[`itemdif',1]=`boucle'
matrix dif_rc[`itemdif',1]=`boucle'
if "`detail'" != ""{
di as text _col(10) "{hline 65}"
di as text _col(10) "{hline 65}"
di
di
di as result "Difference between groups on ``itemdif'' at time 1"
di as result "Difference between groups on ``itemdif'' at time 1"
}
if `nbmoda_`itemdif'' > 2 {
if `nbmoda_`itemdif'' > 2 {
if "`detail'" != "" {
di
di
di %~60s as text "Test of uniform difference"
di %~60s as text "Test of uniform difference"
@ -897,7 +993,7 @@ if "`group'"!="" & "`nodif'"=="" { // PARTIE 1 = Slmt si option group & pas de "
di _col(10) as text "Chi-square" _col(28) "DF" _col(40) "P-value"
di _col(10) as text "Chi-square" _col(28) "DF" _col(40) "P-value"
di _col(10) as result %4.2f `=test_difu_`boucle'[`itemdif',1]' _col(28) `=test_difu_`boucle'[`itemdif',2]' _col(40) %4.2f `=test_difu_`boucle'[`itemdif',3]'
di _col(10) as result %4.2f `=test_difu_`boucle'[`itemdif',1]' _col(28) `=test_difu_`boucle'[`itemdif',2]' _col(40) %4.2f `=test_difu_`boucle'[`itemdif',3]'
di _col(10) as text "{hline 40}"
di _col(10) as text "{hline 40}"
}
if test_difu_`boucle'[`itemdif',3]<0.05{ /*DIF NU détectée*/
if test_difu_`boucle'[`itemdif',3]<0.05{ /*DIF NU détectée*/