Introduction

Throughout the life cycle of the human being, it is observed that the presence of situations, stimuli, or circumstances that occur unexpectedly and cause changes or readjustments in the life of the person (^{Ruiz & Valdivieso, 2002}). Currently, a vision about adolescence considers it a particularly vulnerable period for the experimentation of difficulties for development, mainly related to three areas: conflicts with parents, emotional instability, and risk behaviours (^{Jiménez García, Menéndez Álvarez-Dardet, & Hidalgo García, 2008}; ^{Oliva, 2003}).

Psychosocial stress has been conceptualized as any fact or circumstance that occurs in the life of people with the potential to alter their current mental state or physical well-being regardless of age (^{Goodyer, 2001}). Within this psychosocial stress, stressful life events (SLE) are defined as those vital events that alter the maintenance mechanisms of cognitive, emotional, and physiological stability, challenging their coping resources (^{Ingram, Miranda, & Segal, 2006}). SLE may come from any area of life such as family, academic, social, economic, work, couple, among others, giving a significant increase in the frequency during the adolescence stage (^{Goossens, 2006}).

In studies carried out in Mexico in high school and university students on stress, it has been found that 92% of the population has experienced academic stress with a medium-high intensity, presenting problems of concentration, restlessness, anxiety, and distress (^{Macías & Quiñónez, 2007}), besides being a predictor of chronic stress (^{Pozos-Radillo, de Lourdes Preciado-Serrano, Acosta-Fernández, de los Ángeles Aguilera-Velasco, & Delgado-García, 2014}). It has become clear that the accumulation of these events acts as a risk factor for emotional adjustment (^{Jiménez García et al., 2008}). Faced with incorrect or passive coping strategies, the presence of stressful life events can lead to chronic stress, increase the chances of the appearance of negative emotional states, and develop a mental disorder (^{Fernández-Berrocal, Ramos, & Extremera, 2001}; ^{Lizeretti, Extremera, & Rodríguez, 2012}; ^{Sokratous, Merkouris, Middleton, & Karanikola, 2013}).

In addition, emotions play a very important mediating role in potentially stressful situations (^{Limonero, Tomás-Sábado, Fernández-Castro, & Gómez-Benito, 2004}). Faced with the stress load, students often manage coping strategies such as problem solving, being positive, and assertive skills, which are related to emotional intelligence (EI) (^{Garaigordobil & Peña, 2014}; ^{Rey, Extremera, & Pena, 2011}). Several studies have found negative relationships between stress levels and clarity and regulation of one’s emotions (^{Extremera, Durán, & Rey, 2009}; ^{Ramos, Fernandez-Berrocal, & Extremera, 2007}).

Emotional Intelligence EI is a term proposed by ^{Goleman (2002)}, which refers to the ability to recognize one’s own feelings, those of others, and the motivation and proper management of intra and interpersonal relationships. Currently, due to the great interest of various researchers, EI has been gaining strength in the psychological field, for its study in the educational, labour, clinical, and social fields (^{Belova, Sabirova, & Malykh, 2014}; ^{Salguero, Fernández-Berrocal, Ruiz-Aranda, Castillo, & Palomera, 2011}). Recently it has been defined as a skill and at the same time a deliberate process, which requires an effort to attend and perceive feelings in an appropriate and precise way, the ability to assimilate them, understand them adequately, and the ability to regulate and modify voluntarily one’s own mood or that of others (^{Koole, 2009}).

In recent years, several studies have been carried out with the objective of explaining the role of EI in the regulation of emotions in adolescents; some of the findings found in this age group indicate that adolescents with a higher score in EI report greater awareness and control of their own emotions (^{Mayer, Salovey, & Caruso, 2008}; ^{Veytia López, Fajardo-Gómez, Guadarrama, & Escutia, 2016}). In contrast, adolescents with significantly lower scores on EI have high scores on physical and verbal aggressive behavior, hostility, and anger (^{Inglés et al., 2014}). In addition, when adolescents show a greater ability to perceive emotions in others, they have a higher level of self-confidence, and less feeling of disability and social stress (^{Salguero et al., 2011}).

It has been observed that there are individual factors that contribute to differences in EI in adolescents, such as sex, socioeconomic status (^{Resurrección, Salguero, & Ruiz-Aranda, 2014}), parental practices (^{Argyriou, Bakoyannis, & Tantaros, 2016}), and academic performance (^{Kokkinos & Vlavianou, 2019}). In relation to sex differences in EI, it has been found that women experience more positive and negative emotions and with greater intensity than men (^{Grossman & Wood, 1993}). ^{Sánchez-Nunez, Fernández-Berrocal, Montañés, & Latorre (2008)} report that this is because society defines the emotional stereotypes of genders differently.

In relation to EI, ^{López-Barajas, Ortega Álvarez, and Moreno Romero de Ávila (2010)} reported that women have more attention to emotions, while men tend more to emotional regulation, with no differences in the dimension of emotional clarity. According to the stress response, style model women tend more to rumination responses and men tend to distracting responses (^{Abela & Hankin, 2009}). That is, in the case of women, the stress response tends to repeatedly focus attention on the feelings and possible consequences of the negative mood without taking any action to change the feelings or solve the problem that causes them. It has also been observed that girls show higher scores in attention to their feelings and, in turn, a greater perception of stress than boys. On the other hand, boys seem to show higher scores in regulating their emotions (^{Pacheco, Durán, & Rey, 2007}).

The above findings suggest that there are sex differences in the mechanisms to cope with stressful events. Unfortunately, to date, research on emotional skills and stress has not deepened these differences, relevant to the development of intervention programs. Due to the scarcity of studies focused on the relationship of stressors in the lives of adolescents and the skills used to deal with such situations in Mexico. The present study main objective is to determine the effect of stressful live events (SLE) and perceived emotional intelligence (PEI) on the stress level in Mexican high school adolescent students and identify the differences by sex. This general objective includes the following one a) to identify the prevalence of stressful life events by sex; b) to examine gender differences in stressful events and emotional skills; c) to analyse the association between emotional intelligence, stressful life events and the perception of stress by sex.

According to the scientific literature on stress and emotional skills, we expect to find results that indicate a greater perception of stress in women, and a greater attention to their feelings, whereas men are expected to present higher scores in clarity and emotional repair. It is also expected to find differences between both sexes in the relationships between emotional abilities and the perception of stress of different stressful events. Finally, we expected that PEI components moderate the association between SLE and perceived stress.

Method

Results

Moderation analysis

In order to know the role of PEI in the relationship between the number of SLE and the level of stress perceived by the SLE, a moderation analysis was carried out. Age and sex were included as covariates in step one, the number of SLE were introduced in step two and the sub-factors of PEI were included in step three. Finally, the interactions between the number of SLE and the sub-factors of the PEI step four were included.

The model explained 33% of the variance of perceived stress (Table 3). Socio-demographic factors predicted 5% of the variance of perceived stress, while the number of SLE explained 21%. Including the sub-factors of the PEI, 32% of the variance of the perceived stress was explained to the model, being the attention variable the one that was statistically significant. In the interactions, a significant effect of the number of stressful life events was found by the attention that had an added effect in explaining the variance of perceived stress.

Table 3  Analysis of hierarchical moderation for perceived stress  

Perceived stress	R2	B	S. E.	β	t	CI 95%		R2 Change
Step 1	.05							∆R2 = .055, F (2, 1395) = 23.40***
Sex		.24	.04	.18	6.84***	-.31	-.17
Age		.01	.02	.01	.64	-.02	.05
Step 2	.26							∆R2 = .212, F (3, 1395) = 120.98***
Stressful events		.21	.01	.41	17.49***	.02	.02
Step 3	.32							∆R2 = .063, F (6, 1395) = 72.74***
Attention		.19	.01	.19	7.94***	.01	.02
Clarity		-.01	.01	-.06	-1.88	-.01	.01
Repair		.01	.01	.01	.45	-.01	.01
Step 4	.33							∆R2 = .008, F (9, 1395) = 49.64***
SLE x Attention		.01	.03	.15	2.83**	.01	.01
SLE x Clarity		-.01	.03	-.09	-1.15	-.01	.01
SLE x Repair		.01	.03	-.02	-.32	-.01	.01

^*p < .05;

^**p < .01;

^***p < .001.

To examine the influence of sex and the sub-factors of the PEI on perceived stress, we conducted moderation analyses to tests whether sex moderated the effect of sub-factors of the PEI on perceived stress. In the first step, age and sex were entered as covariables. The sub-factors of the PEI were entered in the second step. At last, the sub-factors of the PEI x sex interactions were included in the third step. For predicting perceived stress, a total of 11% of the variance was explained by final model (Table 4). The sex x repair interaction explained a significant amount of the variance in perceived stress. We used ^{Dawson (2014)} to graphically represent the moderating effects. As shown in Figure 1, there are significant differences in the scores of perceived stress for individuals with low and high attention in both sexes, while the differences for clarity are only significant for women, the same as for regulation scores. In men, no significant differences were found in the scores on perceived stress, differentiating for low and high clarity and regulation.

Table 4  Analysis of sex moderation for the association between emotional intelligence and perceived stress   

Perceived stress	R2	B	S. E.	β	t	CI 95%		R2 Change
Step 1	.02							∆R2 = .023, F (2, 1414) = 17.75***
Sex		.21	.03	.15	5.82***	.25	.55
Age		.03	.02	.04	1.73	-.01	.09
Step 2	.10							∆R2 = .097, F (5, 1411) = 31.57***
Attention		.03	.01	.30	10.86***	.11	.47
Clarity		-.01	.01	-.13	-3.78***	.03	.48
Repair		-.01	.01	-.02	-.71	-.02	.19
Step 3	.11							∆R2 = .107, F (8, 1408) = 22.29***
Sex x Attention		.01	.01	-.01	-.01	-.21	.21
Sex x Clarity		-.01	.01	-.11	-.85	-.37	.15
Sex x Repair		.01	.01	-.37	-2.61*	-.65	-.09

^*p < .05;

^**p < .01;

^***p < .001.

Figure 1 Differences in attention on the perception of stress. 

 

Discussion and conclusion

The goal of this study was to determine the effect of stressful life events (SLE) and perceived emotional intelligence (PEI) on the stress level in Mexican high school adolescent students and identify the differences by sex. We found a moderation effect for levels of attention to emotions for both men and women, where a high level of attention implies higher levels of perceived stress. In turn, a high clarity and emotional repair show lower levels of perceived stress only in women. The research confirms the role of PEI; this indicates that emotional skills and stress levels have a close relationship, placing EI in a decisive role for emotional self-control and the individual’s adaptive capacity to deal with stressful situations (^{García-Sancho, Salguero, & Fernández-Berrocal, 2015}). In addition, EI has been shown to facilitate greater adaptation to stress with effective coping strategies, helping to understand, accept, and adapt daily stress. As a result, adolescents with adequate PEI are better able to regulate negative moods and prolong positive ones, while having better reflective and active coping strategies (^{Martínez, Piqueras, & Inglés, 2011}).

Another objective of this study was the identification of the prevalence of stressful life events in Mexican adolescents, finding high rates of stressful experiences lived and related to family, personal, social relationships, and the academic field. These results coincide with similar findings found in the previous literature on the subject (^{Garaigordobil & Peña, 2014}; ^{Oliva Delgado, Jiménez Morago, Parra Jiménez, & Sánchez-Queija, 2008}; ^{Veytia López, González-Arratia, Andrade, & Oudhof, 2012}); where experiencing a greater number of stressful situations may involve suffering higher levels of stress in adolescence (^{Jiménez García et al., 2008}). Emotion management mitigates the negative effects of stress, cushioning the impact of stressful events (^{Salovey, Stroud, Woolery, & Epel, 2002}).

At the same time, men showed a greater number of stressful life events related to the couple, which differs from what was found in the previous literature (^{Jiménez García et al., 2008}). Regarding gender differences in stress levels caused by stressful life events and emotional skills, the results showed significant levels of stress in women caused by academic, personal, family, social, or friendship problems, and general higher perception of stress than men. These differences may be due to the fact that women have greater emotional and cognitive vulnerability, and experience greater problems of internalization, depression, and anxiety than men (^{Casullo & Fernández Liporace, 2001}; ^{Giménez, Vázquez, & Hervás, 2010}; ^{Gómez-Maquet, 2007}).

In this study, significant differences were found between men and women in attention to emotions. It may indicate that women have ruminative processes on their affective and emotional states related to depression and anxiety (^{Ramos et al., 2007}). Regarding the association between emotional intelligence, stressful life events and the perception of stress, the results showed positive and statistically significant correlations between the attention dimension and the stress levels of all stressors, both in men and women, although these associations were weak (< .30). Also, it was observed that low scores in clarity and emotional repair are associated with higher levels of stress in adolescent women. In addition, it was found that women presented negative relationships between clarity and emotional reparation and the stress perceived by the different Stressful Life Events (SLE). These associations suggest a greater influence of emotional skills in women on SLE (^{Pacheco et al., 2007}).

In turn, men display low emotional attention and average scores in clarity and emotional repair, aspects that, although they denote adequate PEI, should be examined in detail in future studies, because it has been documented that men self-report a perceived emotional intelligence superior to that shown in execution tests (^{Gartzia, Aritzeta, Balluerka, & Barberá, 2012}; ^{Sánchez-Nunez et al., 2008}). It is noteworthy, however, that findings indicate low-moderation magnitude correlations but significant with SLE subscales: therefore, these results must be taken into consideration appropriately.

In this way, it is concluded that PEI in adolescents minimizes the likelihood of develop negative emotional states, in the presence of SLE in life (^{Sanz Rodríguez et al., 2009}). This is important given that adolescents experience several stressful life events, so they are at greater risk of the presence of depression symptoms (^{Veytia López et al., 2012}), higher levels of anxiety, and low self-concept and irritability (^{Martínez et al., 2011}). This research considers that attention dimension of PEI in adolescents, especially in women, could modulate stressful life events in perceived stress.

Throughout the present research, it was possible to document the importance of the study of negative moods such as stress in adolescents. It has been shown that over the years both the circumstances that favour the development of this and those that make it difficult tend to change (^{Jiménez García et al., 2008}) so that detection and proper management in early stages can prevent in adulthood suffer some emotional disorder (^{Calvete & Estévez, 2009}). In addition, the identification in adolescents of positive psychological factors such as emotional intelligence is important since it can act as a tool that favours emotional adjustment (^{Salovey et al., 2002}). Although it has been referred throughout this investigation, the possible biopsychosocial factors that give rise to levels of emotional intelligence higher and/or lower, such as the educational, labour, clinical and social (^{Belova et al., 2014}; ^{Limonero et al., 2004}; ^{Salguero et al., 2011}). It is still fundamental to expand the variety of studies on the subject. Therefore, it is suggested to continue documenting the effects of PEI as a positive factor in order to have as much scientific evidence as possible about the important role it plays in the development of adolescent mental health, increasing the possibilities of promoting optimal mental health to this population in future ages. The limitations that may affect this type of studies must be taken into account, since by being of a transversal nature, the temporal relationship between cause and effect is not verifiable. On the other hand, because the sample analyzed only included adolescent students from three public high schools, the results cannot be generalized to adolescents of the general population or to young people who study in private schools. Likewise, it should be noted that this research also has important strengths since this study evaluates the presence of emotional intelligence perceived in adolescents, a variable that has been studied very little in this age group.