Abstract
This study aimed to verify the effectiveness of lectures given by school counselors in Japan using statistical methods. A school counselor (SC) conducted an online lecture to improve the self-esteem of high school students during the pandemic caused by the coronavirus disease. We administered the SE-1 self-esteem scale (SE-1) and a questionnaire on self-expression before and after the lecture, and developed a high school student assertion scale (high school AS) from the self-expression questionnaire. The SE-1 and high school AS were used to examine the impact of the SC’ s lecture on students’ self-esteem. Effectiveness of both scales was
confirmed using a paired t-test, and causal relationships were verified through the delayed effects model and simultaneous effects model. Gender and grade differences were determined using a three-factor mixed design analysis of variance. The results indicated that there was no difference in high school AS between pre- and post-high school AS, and SE-1 was considerably different between pre- and post-high school AS. Although there was no grade difference in SE-1, there was a gender difference, with the mean score of boys being substantially higher than that of girls. Findings suggest that the lecture given by the school counselor impacted the selfesteem of high school students.
