Social self-efficacy has been shown to be a key resource for adolescents’ social experiences with peers and a predictor of prosocial behaviour among adolescents. However, differences by gender, age and socioeconomic level have previously been found in social self-efficacy. The objective of this study is to assess the psychometric properties of the subscale of social self-efficacy from the Self-Efficacy Questionnaire for Children (SEQ-C) developed by Muris (2001) in a representative sample of Spanish adolescents while considering gender, age and socioeconomic level differences. In general, the results showed good psychometric properties and a one-dimensional structure with high internal consistency, adequate explained variance and evidence of external validity for the subscale. Furthermore, the invariance analysis demonstrated that the social self-efficacy subscale shows no bias when used with populations of adolescents who differ by gender, age and socioeconomic level. The results indicate that the Spanish version of the social self-efficacy subscale of the SEQ-C is an adequate measurement instrument for assessing adolescents’ perception of their own social skills.

The aim of this research was to test the effect of training impure tact versus pure tact and intraverbals on the emergence of new verbal operants (impure tacts), thus establishing a conceptual and methodological differentiation on these operants. This was done by varying the training order of intraverbal or impure tact to analyze and confirm whether or not impure tact is the mere sum of pure tact plus intraverbal and therefore has different functions and consequences in learning. An experiment was conducted with 30 participants randomly assigned to three groups. In Group 1, pure tact plus intraverbal and then impure tact were trained. In Group 3 the training order of these operants was counterbalanced. Group 2 was the control group, training only pure tact plus intraverbal. After the training phases, the emergence of impure tacts was tested. The results of this research indicate that the training of impure tacts favors the emergence of new impure tacts to a greater extent than the training of pure tact plus intraverbal and that they therefore have different functions. It is also shown that variation in the order of presentation of the type of training influences the subsequent emergence of new operants (impure tacts), so that creating a previous history of learning in impure tacts favors emergence even when the intraverbal alone is subsequently trained. This has important implications at both conceptual and methodological levels as it would contribute to the development of more effective language training technologies.