Figure 4From: Development of new measurement system of thoracic excursion with biofeedback: reliability and validityScatterplots of chest expansion scores by BREATH and tape measure. Each dot shows data of each participant by each evaluator. Pearson’s correlation coefficients for the measurement methods were 0.76-0.87 for the three evaluators, which confirmed high validity of BREATH compared with the tape measure (p < 0.001).Back to article page