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Many studies have been performed on animals to study their behavior, but not as many on the development of behavior, and not yet on chickens. Therefore, 42 red junglefowls were tested in three Novel Arena, Novel Object and Tonic Immobility tests to investigate the ontogeny of personality. Several behaviors were stable over time in the Novel Arena and Novel Object tests, and are a part of the bird’s personality, while other behaviors were plastic. The stability of the behaviors increased over time. The decrease in duration of the Tonic Immobility can be due to decreased stress during the length of the study. The study showed that personality can be detected early in a chicken’s life, even though a lot of the observed behaviors change. Further studies are needed to figure out duration of the stability and why certain behaviors are stable.

Social status is commonly established among individuals within groups of animals. Despite this common characteristic of social animals it is still unclear how individuals establish their status. I investigated the relationships between morphology, posture and behaviours with social status in red junglefowl hens. The hens tested were measured (weight, comb length, comb height and tarsus length) and exposed to three different behavioural tests (novel arena, novel object and interaction test). None of the morphological features were associated with social status. However, dominant hens initiated the first encounter in a dyad interaction and performed a higher proportion of aggressive encounters against the opponent. The dominant hens were also the ones displaying more spread tail feathers than the opponent after status being established. Aggressiveness and social status is strongly linked, showing that there is a scope of behaviours to affect the establishment of status.

The current study examines both attachment style and the current romantic relationship's influence on exploration. A sample was gathered of 152 female and 130 male undergraduate students from Texas A&M University. The study found that attachment styles were related to the participants' perceptions of their partner with regards to exploration. Specifically, avoidant people report using exploration as a means to distance themselves from their partner. Anxious people respond that they are dependant on their partner to explore. In addition, the study found that the Anxiety dimension predicted exploration across a range of established scales from the literature. Finally, the study presents evidence that the degree to which anxious people feel that they explore out of dependency on their partner mediates the association between anxiety and exploration. These findings highlight the importance of accounting for the current relationship partner in future studies of exploration and attachment.

Thèse doctorat : Informatique : Villeurbanne, INSA : 2004. / Titre provenant de l'écran-titre. Bibliogr. p. 129-136.

Thèse doctorat : Informatique : Villeurbanne, INSA : 2007. / Titre provenant de l'écran-titre. Bibliogr. p. 235-252.

Thèse de doctorat : Informatique : Nancy 1 : 2008. / Titre provenant de l'écran-titre.