<![CDATA[Penelitian ini adalah Penelitian dan Pengembangan yang bertujuan untuk mengembangkan instrumen sikap terhadap fisika peserta didik MA Muhammadiyah Punnia. Pengumpulan data dilakukan melalui validasi teoretik, validasi empirik dan efektivitas instumen. Indikator dari instrumen sikap terhadap fisika yaitu Kognisi (Keyakinan), Afeksi (Perasaan), dan Konasi (Kecenderungan berperilaku). Hasil penelitian menunjukkan bahwa pada validasi teoretik untuk instrumen sikap terhadap fisika yang terdiri dari 44 butir pernyataan dengan nilai koefisien konsistensi antar pakar sebesar 0,79. Pada tahap validasi empirik dilakukan uji coba sebanyak 2 kali, dimana pada uji coba pertama dilakukan dikelas XI MIA 1 dan XI MIA 2 dimana terdapat 31 butir pernyataan yang valid dan 13 butir pernyataan yang tidak valid, Reliabilitas instrumen sebesar 0,890. Adapun dari 13 butir instrumen yang tidak valid dilakukan revisi atau perbaikan sebanyak 5 butir sehingga tersisa 8 butir instrumen yang akan dihilangkan. Pada uji coba kedua dilaksakan di kelas XI MIA 3 dan XI MIA 4 yang terdiri 36 butir pernyataan dimana terdapat 31 butir pernyataan yang valid dan 5 butir pernyataan yang tidak valid, Reliabilitas instrumen sebesar 0,914. Untuk efektivitas instrumen dari tiga aspek yaitu kepraktisan, keterpakaian dan keterlaksanaan diperoleh bahwa instrumen tersebut efektif untuk menilai sikap terhadap fisika peserta didik. Berdasarkan hasil analisis instrumen penilaian yang dikembangkan telah valid dan reliabel serta layak digunakan. Kata kunci: instrumen, validitas, reliabilitas This research is a Research and Development which aims to develop an attitude instrument towards physics students of MA Muhammadiyah Punnia. Data was collected through theoretical validation, empirical validation ,and instrument effectiveness. The indicators of the attitude instrument towards physics are Cognition (Belief), Affection (Feelings), and Conation (Tendency to behave). The results showed that the theoretical validation for the attitude towards physics instruments consisted of 44 statements with a coefficient of consistency between experts of 0.79. At the empirical validation stage, 2 trials were conducted, where the first trial was conducted in class XI MIA 1 and XI MIA 2 where there were 31 valid statements and 13 invalid statements. The reliability of the instrument was 0.890. As for the 13 items of instruments that were not valid, 5 items were revised or corrected so that the remaining 8 instruments were to be omitted. In the second trial carried out in class XI MIA 3 and XI MIA 4 which consisted of 36 statements of which there were 31 valid statements and 5 invalid statements, the reliability of the instrument was 0.914. For the effectiveness of the instrument from three aspects, namely practicality, usability and applicability, it was found that the instrument was effective for assessing students' attitudes towards physics. Based on the results of the analysis, the assessment instrument developed was valid and reliable and suitable for use. Keywords: instruments, reliability, validity]]>
