sansdec' a écrit :  Je voudrais que tu me prouves que des gens qui ont un visage symétrique sont moins malade. Attention j'ai dit prouvé. Cette etude pseudo-scientifique ne prouve rien. Elle constate que sur leur etude de 400 peronnes ils ont obtenus ce resultat. C'est tout. 
 J'ai été un peu long, le temps de chercher d'autres études. J'en ai trouvé 3 autres qui trouvent une correlation positive entre symétrie du visage et santé:
1 et 2 : Facial asymmetry as an indicator of psychological, emotional, and physiological distress Personal Author: 
Shackelford, Todd K.; Larsen Randy J.; 
Journal of Personality and Social Psychology (February 1997) p. 456-66Physical Description: Bibliography ISSN: 0022-3514 - Abstract: Fluctuating asymmetry (FA) is deviation from bilateral symmetry in morphological traits with asymmetry values that are normally distributed with a mean of 0. FA is produced by genetic or environmental perturbations of developmental design and may play a role in human sexual selection.
 K. Grammer and R. Thornhill (1994) found that 
facial asymmetry negatively covaries with observer ratings of attractiveness, dominance, sexiness, and 
health. Using self-reports, observer ratings, daily diary reports, and psychophysiological measures, the 
authors assessed the relationship between facial FA and health in 2 samples of undergraduates (N = 101). Results partially replicate and extend those of K. Grammer and R. Thornhill (1994) and suggest that facial FA may signal psychological, emotional, and physiological distress. Discussion integrates the authors' findings with previous research on FA and suggests future research needed to clarify the role of FA in human sexual selection.
3- 
Zaidel, Dahlia W. ; Aarde, Shawn M. ; Baig, Kiran 
Affiliation: Department of Psychology, University of California, Los Angeles, CA, US; Department of Psychology
Titre: Appearance of symmetry, beauty, and health in human faces. Source: Brain & Cognition Vol 57(3) (Apr 2005): 261-263
Adresse URL: 
http://www.academicpress.com/b&c
Numéro normalisé: ISSN: 0278-2626 - Abstract: Symmetry is an important concept in biology, being related to mate selection strategies, health, and survival of species. In human faces, the relevance of left-right symmetry to attractiveness and health is not well understood. We compared the appearance of facial attractiveness, health, and symmetry in three separate experiments. Participants inspected front views of faces on the computer screen and judged them on a 5-point scale according to their attractiveness in Experiment 1, health in Experiment 2, and symmetry in Experiment 3. 
We found that symmetry and attractiveness were not strongly related in faces of women or men while 
health and symmetry were related. There was a significant difference between attractiveness and symmetry judgments but not between health and symmetry judgments. Moreover, there was a significant difference between attractiveness and health.