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Nugroho, Purna Bayu; Nusantara, Toto; As'ari, Abdur Rahman; Sisworo; Hidayanto, Erry; Susiswo – International Journal of Instruction, 2018
One characteristic of a person having a critical thinking disposition is engaging in the activity with reflective skepticism. Skeptical attitudes can encourage a person to reflect so as to produce a correct conclusion and make the right decision. This article aims to determine: (1) the cause of students skeptic in dealing with illlogical…
Descriptors: Critical Thinking, Mathematical Logic, Mathematics Instruction, Problem Solving
Sutarto; Nusantara, Toto; Subanji; Sisworo – Educational Research and Reviews, 2016
This aim of this study is to describe the process of local conjecturing in generalizing patterns based on Action, Process, Object, Schema (APOS) theory. The subjects were 16 grade 8 students from a junior high school. Data collection used Pattern Generalization Problem (PGP) and interviews. In the first stage, students completed PGP; in the second…
Descriptors: Junior High School Students, Problem Solving, Generalization, Cognitive Processes