Changes in the tendency of children to describe and elaborate ten different kinas of realtions were explored in a two-year period. Thirty-five children solved a task of identifying relations and then, answered to questions made in interviews on three different…

280 niños del primer grado de primaria desarrollaron una serie de tareas de lectura y escritura (las morfologías de las tareas) de diferente grado de complejidad (sus niveles funcionales). Los niveles de complejidad de las tareas se pre-establecieron como funciones…

Fourteen mother-retarded child dyada were formally and functionally classified in their interactions in four different contexts: feeding, personal cleaning, homework and free play. Categories employed to analyze those interactions were derived from interactive functional levels proposed by Ribes and López.…

The objective of this research was to evaluate the nature and the amount of commentaries made by two Futsal´s coaches during the practices and competitive games and the moment of the game which the commentaries were made by them. Two…

 To evaluate the effects of instructional specificity (specific vs. generic) and feedback density (none, continuous, or delayed) on instruction following and rule elaboration, 30 college students were randomly assigned to one of six experiemental groups in order to perform a…

Three experiments were done to evaluate the effects of instructions and performance descriptions, with and without solution criterion, on the facilitation of contingency-substitution interactions. Thirty two college students, of both sexes, volunteered to participate, and were randomly distributed in eight…