IBM® SPSS® Amos™ 28

When conducting a specification search, the primary concern is model comparison rather than the evaluation of a single model by itself. For the purpose of model comparison, Amos provides

▪extensive tabular and graphic summaries of comparative model fit and its relationship to number of parameters

▪rescaled versions of AIC, BCC, and BIC

▪Akaike weights based on either AIC or BCC

▪Bayes factors

▪a scree test similar to the scree test used in factor analysis (Cattell, 1966)

Amos also provides additional statistics for evaluating models in absolute terms (as distinguished from model comparison). Amos fits alternative "null" or "baseline" models in addition to the usual zero-correlation baseline model. Each alternative baseline model gives rise to an alternative value for such fit measures as CFI that depend upon comparison to a baseline model.