Development and Validation of a Socio-scientific Issues Based Critical Thinking Test for Phase F Students on Buffer Solutions
DOI:
https://doi.org/10.47945/search.v5i1.3367Keywords:
Critical Thinking, Socio-scientific issues, Buffer solution, Test instrumentAbstract
Tuntutan pembelajaran abad ke-21 menekankan berpikir kritis sebagai keterampilan penting. Pembelajaran kimia perlu mendorong siswa untuk menganalisis informasi, mengevaluasi bukti, dan membuat keputusan yang beralasan. Isu Sosial-Ilmiah (IPM) menyediakan masalah nyata, kontekstual, kompleks, dan kontroversial yang dapat mendorong berpikir kritis melalui penerapan konsep kimia. Studi ini bertujuan untuk mengembangkan tes berpikir kritis kontekstual IPM pada bahan larutan buffer yang memenuhi kriteria yang ditetapkan dan sesuai untuk siswa Fase F di sekolah menengah atas. Studi Penelitian dan Pengembangan (R&D) ini mengikuti tahapan pengembangan instrumen yang diusulkan oleh Liu (2020). Instrumen awal terdiri dari 10 butir esai. Validitas isi dianalisis menggunakan Rasio Validitas Isi (CVR) dan Indeks Validitas Isi (CVI) berdasarkan evaluasi oleh lima Pakar Materi Pelajaran (SME). Pengujian empiris dilakukan dengan siswa di SMA Negeri 3 Bukittinggi menggunakan model Rasch dengan Ministep. Hasil menunjukkan nilai CVR 0,69–0,82 dan CVI keseluruhan 0,70, dikategorikan sangat valid. Analisis Rasch menunjukkan bahwa delapan item sesuai dengan model, dengan reliabilitas item 0,93 dan reliabilitas individu 0,68. Item-item tersebut bervariasi tingkat kesulitannya dari sangat mudah hingga sangat sulit dan dapat membedakan siswa menjadi sekitar tiga kelompok kemampuan. Dua item yang tidak sesuai tidak dipertahankan, sehingga menghasilkan instrumen delapan item yang sesuai untuk menilai pemikiran kritis dalam konteks SSI pada materi larutan penyangga untuk siswa Fase F.
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