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Intraindividual variability in positive and negative affect over 45 days: Do older adults fluctuate less than young adults?

Smith, Jacqui; Röcke, Christina; Li, Shu-Chen. (2009). Intraindividual variability in positive and negative affect over 45 days: Do older adults fluctuate less than young adults?. Psychology and aging. 24(4), 863-878.