Psychology of Space Exploration
Figure 2. Probability that self-initiated images were taken, using general availability as a
predictor across mission.
Extraordinary mission events, along with the period spent in orbit, influenced
whether or not images were taken each day but did not influence the number of
images taken on a given day. To use other words, although general activity predicted
whether or not any photographic activity occurred, it did not predict the number of
self-initiated images taken during regular or extraordinary mission events (t = –.77,
not significant [ns]).
Hypothesis 2: Weekends. According to hypothesis 2, more self-initiated
images would be taken on weekends. This hypothesis was not supported (t = .65,
ns), perhaps because life on the Station does not always allow weekends off. This
finding, in apparent conflict with the preliminary finding that self-initiated images
taken were correlated with weekends, is due to hypothesis 2’s being tested with
more robust statistical methods than those of correlation alone.