Penelitian ini bertujuan untuk mengetahui peran efikasi diri dan dukungan sosial teman sebaya terhadap belajar berdasar regulasi diri pada mahasiswa Universitas Islam Sultan Agung Semarang. Penelitian ini menggunakan metode kuantitatif korelasional. Populasi dalam penelitian ini adalah mahasiswa Universitas Islam Sultan Agung Semarang. Sampel penelitian ini berjumlah� 150 mahasiswa Universitas Islam Sultan Agung Semarang. Metode pengambilan sampel menggunakan simple random sampling. Alat ukur yang digunakan dalam penelitian ini terdiri dari tiga skala. Skala belajar berdasar regulasi diri berjumlah 68 aitem yang memiliki koefisien reliabilitas 0,941 dengan indeks daya beda aitem bergerak antara 0,277 sampai 0,683. Skala efikasi diri berisi 30 aitem yang memiliki koefisien� reliabilitas 0,896 dengan indeks daya beda aitem yang bergerak antara 0,256 sampai 0,693. Serta skala dukungan sosial teman sebaya berisi 40 aitem yang memiliki koefisien reliabilitas 0,919 dengan indeks daya beda aitem yang bergerak antara 0,301 sampai 0,726. Analisis data menggunakan analisis regresi ganda dan parsial. Hasil penelitian menunjukskan adanya peran positif efikasi diri dan dukungan sosial teman sebaya terhadap belajar berdasar regulasi diri dengan diperoleh skor R= 0,325 dan Fhitung= 8,665, p= 0,000 (p<0,05). Variabel efikasi diri dan dukungan sosial teman sebaya secara bersamaan memiliki sumbangan efektif sebesar 10,5% terhadap variabel belajar berdasar regulasi diri. Uji korelasi parsial efikasi diri dengan belajar berdasar regulasi diri diperoleh skor rx1y= 0,178 dengan signifikan 0,030 (p<0,05). Hasil tersebut menunjukkan adanya peran positif efikasi diri terhadap belajar berdasar regulasi diri. Uji korelasi parsial dukungan sosial teman sebaya dengan belajar berdasar regulasi diri diperoleh skor rx2y= 0,173 dengan signifikan 0,035 (p<0,05). Hasil tersebut menunjukkan adanya peran positif dukungan sosial teman sebaya terhadap belajar berdasar regulasi diri.
The physical characteristics of the surface soil are the crucial soil characteristics related to landslides. They can cause landslides and change due to landslides. The physical characteristics of the surface soil in agricultural land play an important role in providing nutrients and as a medium for plant growth. Landslide activities and slope position can change soil characteristics significantly. Studies on the physical characteristics of surface soil in landslide deposition areas have been studied previously, however most of those studies are not discussed yet in regarding with relation of this landslide deposition and agricultural land. The purpose of this study is to characterize and examine the variation of physical characteristics of the surface soil in landslide deposition areas among different landslide activities and slope positions. The method used in this study was purposive sampling based on landslide activities (active, inactive) and slope position (upper-, middle-, and lower slope). Soil samples were taken on the landslide deposits with a depth of 0-30 cm. Soil samples were 11 variations. The results showed that the physical characteristics of surface soil based on landslide activities or slope position were fine texture or clay; particle density, bulk density, and porosity were uniform; high atterberg numbers; slightly slow permeability; and low c-organic as well as organic matter content. Variation of the physical characteristics of surface soil showed high values on active landslides and lower slopes. The most influenced soil property due to landslide activities and slope position was soil permeability.
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