PENGGUNAAN STRATEGI PENGUMPULAN MANDIRI UNTUK MENINGKATKAN PEGUASAAN KOSAKATA SISWA KELAS DELAPAN SMP NEGERI 4 PALU

This study aimed to investigate whether the Vocabulary Self-Collection Strategy
(VSS) could improve the vocabulary mastery of the eight-grade students at SMP
Negeri 4 Palu. A quasi-experimental design involving pre-test and post-test control
groups was employed. The population included all eight-grade students, with two
classes were chosen through purposive sampling: class VIII APEL as the
experimental group was taught using VSS (n=32) and class VIII RAMBUTAN as
the control group using conventional method (n=30). The study focused on students’
understanding of word meanings and their use of two high frequency lexical
categories, namely common nouns and action verbs. The data collected were
analyzed using descriptive statistical and an independent sample t-test, employing
a 0.05 significance level. The results showed an improvement in the experimental
group, whose mean score increased from 51.8 in the pre-test to 80 in the post-test,
while the control group improved only from 54.8 to 63.3. The t-test result, t-count
(9.81) exceeded t-table (1.671), indicating a significant difference between the two
groups. These results demonstrate that VSS, when applied to specific vocabulary
categories and competency levels, could improves students’ vocabulary mastery.
Overall, integrating VSS effectively improved students’ vocabulary mastery by
encouraging active participation and recommending its integration into
instruction.