Fig. 3. Validity effect for the two tasks across conditions.

Mean values and SD (n = 5) are reported. a Exogenous task: the validity effect was larger in 0 g compared to PRE and 1 G, and there was a similar trend for POST (P = 0.055); b endogenous task: the validity effect was smaller in 0 g compared to all 1 g conditions. Newman–Keuls post hoc analyses, *P ≤ 0.05 and **P ≤ 0.01. PRE = 1 g before the flight, 0 G = 0 g on the flight, 1 G = 1 g on the flight, POST = 1 g after the flight.