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David, R., Herring, D. R., Burleson, M. H., Roberts, N. A., & Devine, M. J. (2011). Coherent with Laughter: Subjective Experience, Behavior, and Physiological Responses during Amusement and Joy. International Journal of Psychophysiology, 79, 211-218.
http://dx.doi.org/10.1016/j.ijpsycho.2010.10.007

has been cited by the following article:

• TITLE: A Review Study of Psychometric Functioning of a Picture Scale to Assess Joy in Childhood

  AUTHORS: Laura Beatriz Oros, María Cristina Richaud de Minzi

  KEYWORDS: Positive Emotions, Joy, Assessment, Children

  JOURNAL NAME: Psychology, Vol.6 No.3, February 12, 2015

  ABSTRACT: The early emergence of emotional understanding by means of facial expressions allows the assessment of basic emotions from young ages through pictures or photographs of human faces. This evaluation strategy allows children, with limited language to reveal feelings that neither investigators nor clinicians would be able to obtain verbally. The present work presents a non-verbal activity aimed at testing children’s joy. It is based on a visual analogue scale integrated by seven pictures of infant facial expressions. This scale has the advantage of presenting an animated design, more friendly and appealing than simplified face scales. Its psychometric functioning, revised from different studies, demonstrates that it is a reliable and valid alternative to analyze the experience of joy in small children.