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Table 7 Overall model fit for identity scales—STEM

From: Development and validation of the role identity surveys in engineering (RIS-E) and STEM (RIS-STEM) for elementary students

 

CFA

IRT

Scales

χ

df

RMSEA

CFI

TLI

C2a

df

RMSEA

CFI

TLI

SRMSR

COMP

52.5*

14

.068

.978

.966

40.5*

14

.056

.983

.975

.040

INT

55.9*

14

.071

.987

.981

32.5*

14

.047

.99

.986

.044

SELF

89.5*

9

.122

.975

.958

67.8*

9

.104

.970

.950

.049

OTHERS

115.5*

9

.141

.982

.971

79.1*

9

.114

.975

.959

.057

  1. COMP competence, INT interest, SELF self-recognition, OTHERS recognition by others
  2. *p < .05
  3. aC2 is a variant of the M2 statistic (Maydeu-Olivares & Joe, 2006) for evaluating model fit; C2 is appropriate for polytomous models when there is not sufficient degrees for freedom (e.g., due to low small number of items)