Fig. 2.

Experiment 1: abdomen. (a) Regression lines for the relation between normalized actual and judged distance between pairs of tactile and nociceptive stimuli. Each line depicts the fit of an individual participant data. Black lines represent significant regression models (p < 0.05), while red lines depict non-significant models. (b) Slope: Box plots for the β estimates derived from the regression models for touch and nociception. On each box, the central mark is the median, the edges of the box are the 25th and 75th percentiles, the whiskers extend to the most extreme data points not considered outliers, and outliers are plotted individually. The β values of each individual participant are represented with dots. (c) Goodness of fit: Box plots for the coefficients of determination (R²) derived from the regression models for touch and nociception. The R² coefficients of each individual participant are represented with dots. Experiment 2: Palm of the hand. (d) Regression lines for the relation between normalized actual and judged distance between pairs of tactile and nociceptive stimuli. Each line depicts the fit of an individual participant data. Black lines represent significant regression models (p < 0.05), while red lines depict non-significant models. (e) Slope: Box plots for the β estimates derived from the regression models for touch and nociception. On each box, the central mark is the median, the edges of the box are the 25th and 75th percentiles, the whiskers extend to the most extreme data points not considered outliers, and outliers are plotted individually. The β values of each individual participant are represented with dots. (f) Goodness of fit: Box plots for the coefficients of determination (R²) derived from the regression models for touch and nociception. The R² coefficients of each individual participant are represented with dots.