div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentscihappiness-happify-28309-gruber-j-kogan-a-et-al-2013-happiness-is-besthtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: SciHappiness Happify 28309Gruber J Kogan A et al 2013 Happiness is best kept stable: positive emotion variability is associated with poorer psychological health Emotion The loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsnetreader034viewer20220502135f5f46410d398b51ee08d7ffhtml5thumbnails1jpg width=140 height=200 divdiv