If it was indeed a typo (there is at least one more in the same table—Saleh (2003) is duplicated when there should be one entry for 2003 and one for Saleh 2011). On the other hand, it’s possible it was miscoded or misinterpreted. I’d be surprised if that were the case, but it’s hard to see, for example, how they came up with a number for “mean hours of sleep deprivation” given the 6 different cases for the recovery day sleep in the experimental group, or whether they code an effect size for the group that was sleep deprived for 5 days and then got 10 hours of sleep on the recovery day.
If it was indeed a typo (there is at least one more in the same table—Saleh (2003) is duplicated when there should be one entry for 2003 and one for Saleh 2011). On the other hand, it’s possible it was miscoded or misinterpreted. I’d be surprised if that were the case, but it’s hard to see, for example, how they came up with a number for “mean hours of sleep deprivation” given the 6 different cases for the recovery day sleep in the experimental group, or whether they code an effect size for the group that was sleep deprived for 5 days and then got 10 hours of sleep on the recovery day.