Prolonged cognitive effort
hypoxia
HYPOXIA
Participants performed a modified computerized version of CWST (100% incongruent) for 30 min under hypoxia. The incongruent CWST consisted of four-color words (yellow, blue, green, and red) in different font inks (yellow, blue, green, and red) that were randomly displayed on a computer screen until the participant entered an answer and were followed by a 1500 ms interval. There were four colored buttons on the keyboard. The participants were instructed to press the button corresponding to the ink color displayed on the screen. There was an exception to this rule, however, if the word appeared in red ink, then the correct answer was pressing the button corresponding to the color word itself