Original scientific paper
https://doi.org/10.31299/hrri.60.1.2
Development of a Pictorial representation measurement tool specifically for blind students in junior high school
Siti Mutmainah
; Mathematics Education, Universitas Nahdlatul Ulama Lampung, Lampung, Indonesia; Universitas Negeri Surabaya, Department of Mathematics, Surabaya, Indonesia
Tatag Yuli Eko Siswono
; Universitas Negeri Surabaya, Department of Mathematics, Surabaya, Indonesia
*
Abadi Abadi
; Universitas Negeri Surabaya, Department of Mathematics, Surabaya, Indonesia
* Corresponding author.
Abstract
Pictorial representation skills are crucial for blind individuals to understand and interpret visual information. This study aimed to develop and validate a reliable and informative instrument that can measure these skills in blind junior high school students. Grounded in cognitive theory and existing research on spatial reasoning, visualisation, and communication in blind individuals, the study developed four description-type geometric concept tasks involving interpreting and describing geometric shapes, spatial relationships, and data visualisations. These tasks were specifically chosen to encompass diverse aspects of pictorial representation, allowing for a comprehensive assessment of students’ abilities. Content validity was established using the Aiken formula, which demonstrated strong alignment between the tasks and the targeted constructs, specifically by exceeding the recommended cut-off score for item-to-total correlations. Internal consistency, assessed using Cronbach’s Alpha, was acceptable at 0.823. Item difficulty and discrimination analyses revealed a moderate level of difficulty for all tasks, indicating an appropriate challenge while ensuring differentiation among students. Furthermore, all tasks showed good discrimination power, effectively distinguishing between students with different levels of pictorial representation skills. This validated instrument provides a valuable tool for educators and researchers working with blind students. It can be used to (i) assess individual strengths and support the development of pictorial representation skills in blind students, and (ii) design and adapt instructional materials to cater to diverse needs. However, it is important to acknowledge the limitations of this pilot study, including the small sample size. Future research with a larger and more representative sample is necessary to fully validate the psychometric properties of the instrument and confirm its generalisability across different settings and populations.
Keywords
instrument development; pictorial representation; blind student; validity; reliability
Hrčak ID:
318300
URI
Publication date:
27.6.2024.
Visits: 450 *