The ANOVA analyses present the significant differences on self-efficacy for delivering an
individual inventory service among teachers of different lengths of work experience. Teachers who
had more experience perceived their self-efficacy to be significantly higher than those who had less
experience. This can be explained by stating that one routine job of most teachers is an individual
inventory service. Therefore, teachers who had more work experience would be more familiar with
this job and then feel more confident than those who had less experience