the control group, the value of (T) calculated for variables of cognitive achievement and performance a
legal arbitral is the smallest of levels of significance (0.05) this means that the significant differences between the
results of pre and post tests and in favor of the post. The experimental group, the value of (T) calculated for variables of
cognitive achievement and performance a legal arbitral is the smallest of levels of significance (0.05) This means that
the significant differences between the results of pre and post tests and in favor of the post. the experimental and control
groups, the value of (T) calculated for variables of cognitive achievement and performance a legal arbitral is the
smallest of levels of significance (0.05) this means that the significant differences between the results of the post tests
and in favor of the experimental group