<![CDATA[Glossophobia, or the fear of public speaking, is a common problem among students that negatively affects learning participation and self-confidence. This study aims to examine the effectiveness of the self-instruction technique in reducing the level of glossophobia among students at SMP Negeri 3 Palu. This study employed a quantitative approach with a quasi-experimental method and a Non-Equivalent Control Group Design. The research subjects consisted of 12 students divided into an experimental group and a control group, each comprising 6 students, selected using a purposive sampling technique based on glossophobia level. Data were collected using a Likert-model glossophobia scale that had been tested for validity (Pearson Product Moment correlation) and reliability (Cronbach's Alpha = 0.87), then analyzed using the Mann-Whitney U test. The results showed that at pre-test, the experimental group had an average glossophobia percentage of 63.67% (high category), while the control group had 60.33% (high category). After receiving group counseling treatment with the self-instruction technique, the experimental group's average percentage decreased to 30.67% (low category), while the control group showed only a slight decrease to 59.83% (remaining in the high category). The Mann-Whitney U test obtained an Asymp. Sig. (2-tailed) value of 0.003 (< 0.05), indicating a significant difference between the two groups after treatment. These findings demonstrate that group counseling services using the self-instruction technique are effective in reducing students' glossophobia levels and can be recommended as an alternative guidance and counseling service in schools. ABSTRAK Glossophobia, atau kecemasan berbicara di depan umum, merupakan permasalahan yang umum dialami siswa dan berdampak negatif terhadap partisipasi belajar serta kepercayaan diri. Penelitian ini bertujuan untuk mengetahui keefektifan teknik self-instruction dalam mengurangi tingkat glossophobia siswa di SMP Negeri 3 Palu. Penelitian ini menggunakan pendekatan kuantitatif dengan metode quasi experimental dan desain Non-Equivalent Control Group Design. Subjek penelitian berjumlah 12 siswa yang dibagi menjadi kelompok eksperimen dan kelompok kontrol, masing-masing 6 siswa, dipilih menggunakan teknik purposive sampling berdasarkan tingkat glossophobia. Data dikumpulkan menggunakan skala glossophobia model Likert yang telah teruji valid (korelasi Product Moment Pearson) dan reliabel (Cronbach's Alpha = 0,87), kemudian dianalisis menggunakan uji Mann-Whitney U. Hasil penelitian menunjukkan bahwa pada pre-test, kelompok eksperimen memiliki rata-rata persentase glossophobia sebesar 63,67% (kategori tinggi), sedangkan kelompok kontrol sebesar 60,33% (kategori tinggi). Setelah diberikan perlakuan berupa konseling kelompok dengan teknik self-instruction, rata-rata persentase kelompok eksperimen menurun menjadi 30,67% (kategori rendah), sedangkan kelompok kontrol hanya menurun tipis menjadi 59,83% (tetap kategori tinggi). Hasil uji Mann-Whitney U memperoleh nilai Asymp. Sig. (2-tailed) sebesar 0,003 (< 0,05), yang menunjukkan perbedaan signifikan antara kedua kelompok setelah perlakuan. Dengan demikian, layanan konseling kelompok dengan teknik self-instruction terbukti efektif menurunkan tingkat glossophobia siswa dan dapat direkomendasikan sebagai alternatif layanan bimbingan dan konseling di sekolah.]]>
