title: Social behavior, cortisol, and sIgA levels in preschool children.
abstract: OBJECTIVE
  This study aims to explore the possible existence of behavioral states in early stages of development, which are associated with specific cortisol production profiles and consequently with changes in the immune response [secreted immunoglobulin A (sIgA)].
  
  
  METHODS
  The subjects were 27 boys and 21 girls of preschool age whose behavior was videotaped in free play interactions. Their behavior was then evaluated using an ethogram of the social behavior of the child. Cortisol levels were measured using a radioimmunoassay in saliva samples, and sIgA levels were measured by means of an ELISA, also in saliva samples.
  
  
  RESULTS
  No correlation between cortisol and sIgA levels was found. Variance analysis revealed that the only behavioral pattern, which showed significant differences with regard to cortisol levels, was isolation.
  
  
  CONCLUSIONS
  There seems to be a connection between cortisol levels and isolation behavior; we found no relation between high cortisol levels and a lower sIgA secretion.
authors.affiliation: Area de Psicobiología, Dpto. Procesos Psicologicos, Basicos y su Desarrollo, Facultad de Psicología, Universidad del País Vasco, Av/ Tolosa, 70, 20018, San Sebastián, Spain. pbpsamaj@ss.ehu.es
authors.forename: J R
authors.initials: JR
authors.lastname: Sanchez-Martin
authors.forename: J
authors.initials: J
authors.lastname: Cardas
authors.forename: L
authors.initials: L
authors.lastname: Ahedo
authors.forename: E
authors.initials: E
authors.lastname: Fano
authors.forename: A
authors.initials: A
authors.lastname: Echebarria
authors.forename: A
authors.initials: A
authors.lastname: Azpiroz
mesh_terms: D002657:Child Development; D002675:Child, Preschool; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D007070:Immunoglobulin A / Q000097:blood*; D008297:Male; D011863:Radioimmunoassay; D012919:Social Behavior; D012934:Social Isolation / Q000523:psychology*
chemical_list: D007070:Immunoglobulin A; D006854:Hydrocortisone