Fig. 1.

Respiration signal analyses. (A) Mean respiratory frequency (Hz) as a function of attention condition, as derived from a breath counting algorithm. The MT group displayed slower respiration during IA relative to the untrained group, whereas the groups did not differ during EA. (B) Mean respiratory volume (arbitrary respiration belt units) as a function of attention condition, as derived from a breath counting algorithm. The MT group displayed greater respiratory volume (deeper breaths) during IA relative to the untrained group, whereas the groups did not differ during EA. (C) Rate/volume tradeoffs for respiration as a function of attention condition. The slopes did not differ as a function of attention condition or group.