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131,225 items of data are available, covering 125,458 participants. Array indices run from 0 to 4.
Mean = 2014-12-18
Indicates the time that a participant connected to the online questionnaire system and described their mood over the last week prior to completing the cognitive questionnaire. Note that participants could complete the section of the cognitive questionnaire over multiple sessions so some people have multiple values for this field which must be linked to the individual sections by examing their timestamps.