The Ph.D. Dissertation "The Impact of the Strategy of Interaction with Others According to HIL on the Cognitive Field, Independence versus Reliance on Motor Abilities and Learning Some Basic Skills in Volleyball" was discussed at the Faculty of Physical Education and Sports Sciences.  
The study by the student (Esra Fadel Abbas) aimed at identifying the impact of the HILL model interacting with others according to the cognitive field of independence versus reliance on the kinetic abilities strategy of volleyball students in the second grade. The study concluded that the exercises developed by the researcher with the HIL interaction strategy led to greater alignment between school and student with the variables under study, which encouraged the student to perform properly. 
The study recommended increasing interaction between the school and the student, as this had a positive impact on learning skills and improving the capacity of the actors under study.