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At first, a unidimensional structure of chemistry-specific problem-solving was assumed, but this could not be confirmed.
The FIFA (IRT) findings were similar to the results obtained from the factor analysis using tetrachoric correlation, which supports the decision towards a unidimensional structure.
The validation procedures adopted, which used techniques from both Classical Test Theory and Item Response Theory, showed that the BISOC has a unidimensional structure.
The case described here suggests an alternative option for managers who consider abandoning the matrix and returning to a unidimensional structure.
The resulting scree plot clearly shows a unidimensional structure.
The original DASH has a unidimensional structure [ 33, 52- 54].
Similar(36)
However, the three scales were highly correlated and this reflects a property of our data set: weak inter-item correlations which neither support a clear unidimensional structure nor a structure of independent components.
Exploratory and confirmatory categorical factor analysis (suitable for binary and ordinal items) in Mplus 5.1 did not suggest a single unidimensional structure but a more complex pattern with the parenting items loading on a second dimension.
Similarly, Christophorou et al. [ 12] also confirmed a clear unidimensional structure for the Greek version of MCDAS.
b) Internal validity: exploratory factor analysis (EFA) of the Hip and Knee reveals the presence of more than one dimension, although the first factor explains 32% of the variance, which speaks in favor of the existence of a latent unidimensional structure.
It was noted that the CD-RISC presents an essentially unidimensional structure, so that people can be evaluated in a single overall score of resilience.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com