Figure 2

Coherence loadings: four factors best differentiate Asperger’s syndrome from autism spectrum disorders. EEG coherence factor loadings shown. View from above head, nose at top of each head image, left ear to left of image. Factor number is above each head and peak frequency for factor in Hz is above to right. Lines indicate top 85% coherence loadings per factor. Bidirectional color arrows delineate electrode pairs involved in the displayed factor. Red line = increased coherence in ASP group; blue-green line = decreased coherence in ASP group compared to ASD group. Relevant electrodes (see Figure 1) per factor are shown as black dots. The comparison electrode is shown as a red circle. Background colored areas are regions delineated by original PCA. Involved electrodes: Symbol ‘↔’ connects coherent electrodes for each factor Factor 15: FT9 ↔ TP9, F7, F3, P7 and FT10 ↔ F8; Factor 3: T7 ↔ C3, P3, CZ, OZ Factor 33: T8 ↔ F4 Factor 40: OZ ↔ P3, P7, P4. ASD, Autism Spectrum Disorders; ASP, Asperger’s Syndrome.