Based on past research (YòÈargòn et al., 1997), it is expected that up to approximately 20% of participants could have experienced hypersomnia at baseline, and others (up to 20%) will have had normal sleep patterns. Therefore one could reasonably predict anywhere between 60 and 80% of participants would meet the researchers definition of "insomnia." Should the researchers insomnia grouping variable be overly inclusive to the point that more than 90% of participants are in the "insomnia" group, or there are no responders in the "no insomnia" group, then the researchers will utilize an alternate definition that requires the MADRS Q4 score to be 4 or higher. Should the categories still be unbalanced the researchers will create a new grouping variable that defines the presence of a "high sleep disturbance" in contrast to "low sleep disturbance." The presence of a high sleep disturbance will be defined as a score of 4 or greater on the summed HAMD-17 Questions 4, 5, and 6 (summed scores range from 0-6) as well as a score of 4 or greater on MADRS Question 4 (range is 0 to 6). This definition is identical to a "high sleep disturbance" definition used in past research (Trivedi et al., 2013) although the researchers have added the stipulation that the baseline MADRS Q4 score be 4 or higher so that there is consistency between the self-report and clinical-rated assessments. It is unlikely that more than 90% of participants will be classified as having a "high sleep disturbance" based on this definition (Trivedi et al., 2013) and thus represents a potentially more balanced grouping variable. This new "high sleep disturbance" variable would only need to be used in one portion of the analysis (Analysis A, see below) as an alternate to the "insomnia" grouping variable.