Fig. 2

PPA performance on emergent components. A Group differences on emergent components from the varimax PCA. Statistical comparisons run using ANOVA with post hoc comparisons using Sidak corrections (alpha cut-off at p = .025; all relevant statistics displayed in the ‘ Results’ section corresponding to this figure). Bolded p-values indicate statistically significant differences. Scatter plots with marginal density histograms for select components displaying relationships between B general cognition (Component 1) and semantic memory (Component 2), C working memory (Component 3) and motor speech/phonology (Component 4), and D general cognition (Component 1) and working memory (Component 3). Positive scores indicate better performance. C component from PCA, PCA principal component analysis, lvPPA logopenic variant primary progressive aphasia, nfvPPA nonfluent variant primary progressive aphasia, svPPA semantic variant primary progressive aphasia