Table 2.

Interpreter confidence and methods used in selecting V̇O₂θ. Data represent the average percentage of occurrences for each variable.

Confidence	E1	E2	N1	N2	N3	N4	Mean E	Mean N
High	40%	43%	17%*	70%*	57%	57%	42%	50%
Medium	50%	37%	60%	23%	33%	30%	44%	37%
Low	10%	20%	23%	7%	10%	13%	15%	13%
Method
V̇CO2 vs. V̇O2 only	30%	13%*	17%	70%*	67%*	60%*	22%	53%
Dual Criteria only	3%	23%	47%	3%	10%	10%	13%	18%
Both	67%	63%	37%	27%	23%	30%	65%	29%

*p < 0.05; E = experienced interpreters; N = novice interpreters; Dual Criteria = use of the V̇_E/V̇O₂ and V̇_E/V̇CO₂ versus V̇O₂ (Figure 3A) and/or the P_ETO₂ and P_ETCO₂ versus V̇O₂ plot (Figure 3B); Both = use of both the V̇CO₂ versus V̇O₂ plot and the dual criteria plots.