“…For instance, to measure participants’ mood studies used single-item questions [ 24 , 25 , 29 , 30 ], standardized questionnaires [ 23 , 27 ], and automatic mood detection from social media posts [ 16 , 31 ]. Some studies used a single report from participants [ 25 , 27 , 30 ], whereas other employed repeated measure design with daily diaries [ 2 , 20 , 23 , 24 , 29 , 35 ], and experience sampling methods [ 36 ]. Furthermore, the repeated measures lasted from reports over 11 days [ 24 ]; 14 days [ 36 ], 25 days [ 37 ], 30 day [ 35 ]; 90 days [ 2 , 20 ], to two-year period [ 23 ].…”