In summary, performance on the ISS was shown to be significantly improved, thus enhancing mission safety. Additional approaches to docking performance assessment and prognosis are presented and discussed.

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Abstract. Our aim was to adapt a classical P3 method to assess the free cognitive capacity during spacecraft docking training in space. Electroencephalogram (EEG) measurement in space is limited by several conditions. Based on experience with our own EEG experiments on MIR and ISS, we decided to use dry electrodes and restricted the electrode placement to the forehead. We examined whether P3 can be reliably obtained under these conditions. Subjects had to perform a manually controlled docking task simultaneously with an acoustic monitory task. The P3 component was evoked by the acoustic stimuli of the secondary task. Twenty-six subjects participated in this study, situated in a space simulation on earth. After a familiarization session, they performed the docking tasks at three difficulty levels: low, medium, and difficult. In the secondary task, subjects had to discriminate between a low (750 Hz) and a high (1,000 Hz) tone, which differed in probability of 90% and 10%, respectively. The subjects had to count the high tone and after 10 relevant tones and had to give a voice command to a power supply configuration. P3 amplitude was largest and the latency shortest during the medium difficult task. A decision matrix based on differences between the relevant and irrelevant P3 was calculated for each subject and each task. The results suggest that P3 can be recorded during a complex manual control task and can be used to assess individual free cognitive capacity.

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