MODEL MENTAL MAHASISWA CALON GURU KIMIA DALAM MEMAHAMI BAHAN KAJIAN STEREOKIMIA

Abstract

Abstrak: Penelitian ini bertujuan untuk: (1) menentukan distribusi model mental mahasiswa calon guru kimia dalam memahami bahan kajian Stereokimia, serta (2) mengidentifikasi dan mendeskripsikan miskonsepsi khusus (specific misconceptions) dan model mental alternatif yang dimiliki oleh mahasiswa calon guru kimia. Subyek penelitian adalah mahasiswa Jurusan Pendidikan Kimia FMIPA UNDIKSHA yang sedang mengambil mata kuliah Kimia Organik III di Kelas C Semeter V pada tahun ajaran 2013/2014. Jumlah subyek penelitian sebanyak 28 orang. Data dikumpulkan melalui instrumen tes hasil belajar berbentuk pilihan ganda dua tingkat, terdiri dari bagian isi dan bagian alasan. Analisis data dilakukan secara deskriptif. Hasil penelitian menunjukkan, (1) model mental mahasiswa calon guru kimia dalam memahami bahan kajian Stereokimia adalah: tidak ada konsep (20,71%), miskonsepsi spesifik (33,04%), model mental alternatif (12,50%), dan benar secara ilmiah (33,75%); serta (2) miskonsepsi tertinggi (92,86%) terjadi pada penentuan konfigurasi (R/S) senyawa berdasarkan proyeksi Newman, dan model mental alternatif tertinggi (32,14%) pada penggambaran proyeksi Fischer stereoisomer yang diketahui konfigurasi absolutnya.

Kata-kata kunci: model mental, stereokimia, miskonsepsi, model mental alternatif.

Abstract: This study aims to: (1) determine the distribution of pre-service

model in understanding Stereochemistry subject, and (2) identify and describe                                      specific

misconceptions and alternative mental models. Subjects were students of Chemistry Education Department, Mathematics and Natural Sciences Faculty UNDIKSHA, who are taking courses in Organic Chemistry III in 2013/2014 academic year. The number of study subjects were 28 students. Data were collected through achievement test formed multiple choice of two levels, consisting the contents and reasons. The data were analyzed descriptively. The results showed, ( mental model in understanding the subject of stereochemistry were: no concept (20.71%), specific misconceptions (33.04%), alternative mental models (12.50%), and scientifically correct (33.75%); and (2) highest misconceptions (92.86%) occurred in the determination of the configuration (R/S) compounds based on Newman projections, and highest alternative mental models (32.14%) in the depiction of the projection Fischer of stereoisomers that known its absolutly configuration.

Keywords: mental models, stereochemistry, misconceptions, alternative mental models.