The Effect of Using Verbal and Material Reinforcement on Achievement in the Science Course for Middle School Students in Madinah: An Experimental Study

The main objective of the study was to investigate the effect of verbal and tangible reinforcement on the achievement of students who study science in middle schools. The study also tried to find which of the two reinforcement procedures was more effective on the students' achievement. The researcher used experimental analysis to study the effect of the reinforcement. The sample. which was randomly selected. consisted of 90 students divided into three groups. No reinforcement was used with the first group, tangible reinforcement was used with the second group and verbal reinforcement was used with the third group