“…In general, the aforementioned studies have replicated the single-factor structure proposed by Diener et al, 3 and most of them report a reliability coefficient above .80, 16 , 17 , 19 - 27 , 29 - 34 , 36 which is considered a good indicator of score reliability. 37 In terms of validity evidence based on relationships with other variables, scores on the FS have been found to correlate positively with scores on satisfaction with life, 15 , 16 , 18 , 20 - 23 , 25 , 26 , 29 , 31 - 36 positive affect, 16 , 19 , 32 , 35 optimism, 16 , 19 , 22 , 34 , 35 self-esteem, 20 and resilience. 22 , 34 Conversely, a negative correlation has been observed between scores on the FS and those on measures of negative affect, 16 , 19 , 32 ...…”