Developing Multitier Open-ended Transverse Wave Instrument (MOTWI): How Do Assess Students^ Misconceptions? Shobrina Nurul Mufida (a*), Ida Kaniawati (a), Achmad Samsudin (a), Endi Suhendi (a), Fini Alfionita Umar (a), Itsna Rona Wahyu Astuti (a), Jajang Kunaedi (a)
a) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
*shobrina_mufida[at]upi.edu
Abstract
The study aims to describe the instrument validation of developing Multitier Open-ended Transverse Wave Instrument (MOTWI) which is useful in assessing the misconceptions of high school students. The 4D (Defining, Designing, Developing, and Disseminating) model has been utilized as the method of developing the instrument. In development stage, MOTWI contains multiple-wave representations in the first tier. The sample consisted of 67 high school students aged 16-18 years (21 males namely ^Mas^ and 46 females namely ^Mba^). The validity and reliability of MOTWI were analyzed using Rasch Model with MINISTEP software. MOTWI validity from item dimensionality is valid. Cronbach Alpha (α) value is 0.75 and item reliability is a very good category. The construct validation results of MOTWI are valid and reliable for seven items. The students^ conceptions and misconceptions were analyzed with Wright maps. The conceptions of students are categorized as Sound Understanding (SU), Partial Understanding Positive (PUP), Partial Understanding Negative (PUN), No Understanding (NU), Misconception (MC), and No Coding (NC). The misconceptions were mostly found in the characteristics and the factors that affect the speed of propagation of transverse waves. In conclusion, developing MOTWI can be used to assess and identify conceptions and misconceptions of students.
Keywords: Transverse Wave- Misconception- Diagnostic Test Instrument- Rasch Model Analyisis- Physics Education
