).sense, there have been stereotypical views of gender related abilities which contribute to this disparity. Nevertheless, literature review have pointed out this tendency, like Hyde & Linn [7], who concluded in a meta-analysis that there were more similarities than differences between boys and girls, even in those areas where typical gaps have been detected, like mathematics or science. These advances allow overcoming classical theories, focusing on more objective outcomes about the performance trends of boys and girls.
B. Intellectual Ability and Academic AchievementIntellectual ability is the most studied cognitive variable to predict academic achievement, showing a clear direct impact [8], although with some variability [9]. To understand the extent of motivational variables on the prediction of academic achievement, Gagné and St. Pè re [10] assessed the contribution of intrinsic, extrinsic and persistence motivation to academic achievement after controlling the predictive power of intelligence in a sample of 200 female high school students. They confirm that cognitive ability is the best predictor of school achievement but also a lack of correlation between intellectual ability and motivation. It is important to discriminate the level of prediction of motivational variables beyond intellectual ability.
C. Self-Concept and Academic AchievementAmong the motivational variables, self-concept has been considered as one of the major constructs by the scientific community [11]-[15]. Self-concept is usually defined as a set of perceptions of personal behaviors in concrete situations through inferences about the self in different domains [16]. The multidimensional approach of self-concept is a key to its consideration as one of the most important motivational theories of the last 30 years [17]. In the educational field, academic self-concept and academic achievement are often highly correlated, even more so than other self-concept or self-esteem domains [18]. Huang [19], in a recent meta-analysis, confirmed medium to longitudinal relations between self-concept and academic achievement, as have additional previous long-terms studies [20].
D. Self-Regulation and Academic AchievementAccording to previous studies, self-concept is closely related to other motivational and cognitive variables [21], [22], and for this reason, they have been included in all recent models of academic achievement. In relation to students "ability to self-regulate their own process, it is clear that constitutes a key element in explaining academic success [23], [24]. Self-regulation refers to students´" self-generated