Fig. 1.—
Proportion of a) inexperienced and b) experienced children meeting the reproducibility criteria for forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) with and without the use of a computer-animation program during the test (values considered reproducible when differences between the two highest values are ≤5% or ≤100 mL, whichever is greater). Inexperienced children: aged 4–5 yrs, n=25; aged 6–8 yrs, n=16. Experienced children: aged 4–5 yrs, n=12; aged 6–8 yrs, n=35. □: FVC with incentive; : FVC without incentive; └: FEV1 with incentive; ▓: FEV1 without incentive.