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Psicologia: Reflexão e Crítica

Psychology: Research and Review

Table 4 Parameters of the GRM model items

From: Impact of COVID-19 on quality of life in Peruvian older adults: construct validity, reliability and invariance of the COV19—Impact on Quality of Life (COV19-QoL) measurement

Item

a

b1

b2

b3

b4

C2

RMSEA

SRMR

TLI

CFI

I1

2.061

-0.747

-0.008

0.836

1.654

37.47935

0.1032

0.058

0.97

0.98

I2

3.665

-0.442

0.161

0.900

1.590

     

I3

2.333

-0.839

-0.228

0.677

1.610

     

I4

3.704

-0.661

-0.027

0.803

1.566

     

I5

3.087

-0.358

0.290

0.832

1.566

     

I6

2.849

-0.545

0.085

0.744

1.542

     
  1. I1 Item 1, I2 Item 2, I3 Item 3, I4 Item 4, I5 Item 5, I6 Item 6, a Discrimination index, b Difficulty index, C2 Test for ordinal items, RMSEA Root mean square error of approximation, SRMR Standardized root mean square residual, TLI Tucker–Lewis index, CFI Comparative fit index
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