Measuring health workers’ motivation composition: validation of a scale based on Self-Determination Theory in Burkina Faso

Table 7 Results of the structural validation analyses

Model		χ ²	df	p	RMSEA	p RMSEA ≤.05	CFI	SRMR	AIC
A	Model A, the original five-factor model corresponding to Fig. 1, could not be estimated as only one integrated regulation item was retained in the fitting process (at least two are necessary for model identification)
B	Four-factor model: IM (im1-im3), IDEN (iden1-iden3), INTRO (intro1 intro2), EXT (ext1-ext7)	472	84	.000	.064	.000	.867	.069	78 649
C	Five-factor model: IM (im1-im3), IDEN (iden1-iden3), INTRO (intro1 intro2), EXT-S (ext1-ext3), EXT-E (ext4-ext7)	227	80	.000	.040	.996	.950	.033	78 318
D	Two-factor model: AUT (im1-iden3), CTRL (intro1-ext7)	677	89	.000	.076	.000	.799	.076	78 927

Interpretation of fit indices [32]: Insignificant χ ² values indicate good model-data fit. However, due to a number of conceptual and statistical issues, χ ² is often significant even in the case of a relatively good model fit. CFI values approaching .95 as well as RMSEA values of .05 or smaller and SRMR values of .05 and smaller are considered indicative of good model fit. Smaller AIC values indicate better data-model fit compared to alternative models (evaluation goodness of fit (likelihood function) versus complexity of the model)
Legend: IM intrinsic motivation factor, IDEN integrated/identified regulation factor, INTRO introjected regulation factor, EXT external regulation factor, EXT-S external regulation-social factor, EXT-E external regulation-economic factor, AUT autonomous motivation factor, CTRL controlled motivation factor

ISSN: 1478-4491