Within the experimental group, van Hiele levels differed significantly across the three posttests, increasing from right to acute to obtuse angle tests¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2013 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? A one-way repeated measures ANOVA showed significant differences across posttest 1 (M = 1.31), posttest 2 (M = 1.81), and posttest 3 (M = 2.00), F(1.29, 19.29) = 5.71, p = .02. → Poh Geik Tieng & Leong Kwan Eu 2013

Evidence¶

Poh Geik Tieng & Leong Kwan Eu 2013¶

Poh Geik Tieng & Leong Kwan Eu. (2013). Improving Students' Van Hiele Level Of Geometric Thinking Using Geometer's Sketchpad. The Malaysian Online Journal of Educational Technology, 2(3). www.mojet.net. https://eric.ed.gov/?id=EJ1086363

q2 · i? · causal · r1

One-way repeated measures ANOVA on the experimental group's three posttests (n = 16). The article states "the interventio n using Geometer's Sketchpad helped the students improve their van Hiele level of geometric thinking" across successive lessons.

"The results indicated that there weresignificant differences in the students' van Hiele's level of geometric thinking during posttest 1 (M = 1.31, SD = 0.79), posttest 2 (M = 1.81, SD = 0.54), and posttest 3 (M = 2.00, SD = 0.00), F (1.29, 19.29) = 5.71, p = .02"

Discussion¶

Learner Variables¶

• Geometric Reasoning — outcome: instruction changes it

Related Claims¶

• Year Three students taught angles with Geometer's Sketchpad improved significantly in van Hiele level of geometric thinking from pretest to posttest on all three angle concepts — related
• The GSP condition used researcher-prepared worksheets guiding students to discover geometric concepts by dragging and transforming shapes in a computer laboratory — related
• Students' ICT literacy showed no significant correlation with their van Hiele level of geometric thinking after Geometer's Sketchpad instruction — related
• Post-test van Hiele levels did not differ significantly between the Geometer's Sketchpad group and the traditional instruction group on any angle concept — related
• The two groups were equivalent in van Hiele level at pretest except for obtuse angles, where the control group scored significantly higher before instruction — related
• Within-group score changes across pre-test, post-test and retention test were significant in both pretested groups, with larger variance explained in the experimental group — a broader claim this one bears on