This paper analyzer the level of psychosocial stress perceived by Mexi
can high school students related to three areas of life which are rele
vant to adolescents: parent's prohibitions, betrayal by best friend an
d problems with school authorities. In this article psychosocial stres
s is considered as a dynamic process that may vary with sex and life s
tages (Brim and Ryff, 1980). Included is a brief description of the tr
ends in the study of stress conceived as a psychological construct. At
the beginning, stress was considered like a stimulus, where situation
s such as natural disasters were universal stressors, but these early
definitions failed to consider the individual differences involved in
the cognitive appraisal of the events. In the lass decades, investigat
ors have recognized the importance of this issue, and psychological an
d social resources are now considered as important determinants of the
vulnerability of individuals to experience potential stressors. In 19
84, Lazarus and Folkman defined psychosocial stress as a particular ki
nd of relationship between the individual and its environment. The str
ess relationship is that in which the individual perceives that the en
vironmental demands exceed his or her resources. In this definition, c
ognitive appraisal determines if a situation is stressful or not. More
recently, Lazarus (1990) proposed that in order to obtain markers of
the stress process, it was necessary to consider: a) the content of da
ily stressful event, and c) the fluctuations in content and intensity
of stress reactions over time (coping responses). Furthermore, this au
thor suggested analyzing the systems involving a great number of varia
bles that influence each other over time as well as the cultural conte
xts. Sociodemographic indicators such a sex, age, and socioeconomic st
atus play an important role in the definition of groups at risk and po
tentially vulnerable to psychosocial stress and its emotional conseque
nces.