The real question though is whether this affects their memory, reflexes and immune system. Former is reasonably simple to test, latter requires a longer study. The problem is placebo control, which of impossible, and required monitoring to detect microsleeps and oversleeping.

You would need a control group, group with day, forced 8h sleep both biphasic and monophasic, and a group on this fancy multiphasic schedule.

Expensive to run.