It's a little bit unfair to say that this mission was just about nutrition – apparently there were simulated stressors, although I wish there were more details

It's a little bit unfair to say that this mission was just about nutrition – apparently there were simulated stressors, although I wish there were more details about what there. That being said, you're right to say that people weren't being pushed psychologically to the "real" limit that you'd get on long-term isolated missions... I guess that's where The Right Stuff of ye olde Space Age comes in. [1] https://www.nasa.gov/humans-in-space/chapea/about-chapea/ https://www.nasa.gov/humans-in-space/chapea/about-chapea/