Fig. 2.

Identification accuracy and affective valuation of laughter conditions: patient groups versus healthy controls. The panels represent experimental laughter conditions (mirthful, hostile, posed) and the spectrally inverted laughter (inverted) control condition. Plotted on each panel are mean differences (with 95% confidence intervals, adjusted for multiple comparisons with Bonferroni correction of p-values) in unbiased hit rates [Hu] (top panels) or rated valence (bottom panels) between each patient group and the healthy control group. Numerical data are presented in Supplementary Tables S1 and S4. The horizontal dashed line on each panel indicates the zero level corresponding to no difference between patient group and heathy control group. AD, patient group with typical Alzheimer's disease; BV, patient group with behavioural variant frontotemporal dementia; HC, healthy control group; NFV, patient group with nonfluent-agrammatic variant primary progressive aphasia; SV, patient group with semantic variant primary progressive aphasia.