Fig. 5: Task accuracy vs signal amplitude and asymmetry.
From: Associations between fMRI signal amplitude, hemispheric asymmetry, and task performance
a Boxplot representing the distribution of performance accuracy across 12 main task epochs. The box spans the interquartile range (IQR), containing the middle 50% of data points, and the line within each box denotes the median. Whiskers extend from each box to the smallest and largest values within 1.5 times the IQR from the first and third quartiles. Data points beyond the whiskers are displayed as outliers, representing values outside this range. b–e Pearson correlations between accuracy and fMRI signal amplitude (b and d) or asymmetry (c, e) for nine major networks and for control (b, c) and task (d, e) epochs. Non-significant correlations (p ≥ 0.001) are marked with a black cross. The color of each circle represents the direction and strength of the correlation, while the area of each circle is proportional to the value of the correlation coefficient, reflecting its magnitude. f–h Representative scatter plots illustrating linear relationships between accuracy (color coded in f) and both activation amplitude (g) and hemispheric asymmetry (h) within the language network during the story epoch of the language task. Each point reflects the average of 10 individuals grouped by similar amplitude. Black and blue lines are 1st and 3rd order polynomial fits to the data. The shaded area represents the 95% confidence interval around the fitted line. Network abbreviations: VIS1 and VIS2 visual, CON cingulo-opercular, DAN dorsal attention, SMM somatomotor, FPN frontoparietal, AUD auditory, DMN default mode. Sample: 989 healthy adults.
