The no-treatment control group showed no significant score changes between pretest and posttest¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2011 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Data from the control group, which received no treatment, were reported as insignificant. → Rezaei and Dezhara 2011

Evidence¶

Rezaei and Dezhara 2011¶

Omid Rezaei, Salman Dezhara. (2011). An Investigation of the Possible Effects of Favored Contexts in Second Language Vocabulary Acquisition. English Language Teaching, 4(4). https://doi.org/10.5539/elt.v4n4p97

q2 · i? · causal · r1

The control group (class B) received no treatment; its pretest and posttest sport and geography scores are reported in Tables 8-13. The article describes the control-group data as insignificant and therefore presents them concisely; no test statistic is printed for this comparison.

"Due to the insignificance of the data obtained from the control group, the following figures and tables are presented in a concise manner."

Discussion¶

Related Claims¶

• The control group showed no statistically significant change in speaking scores from pretest to posttest — possibly the same claim (merge candidate)
• The experimental and control groups were statistically homogeneous in speaking ability before the treatment — related
• The control group also made statistically significant pretest-to-posttest gains in speaking and writing, so improvement was not exclusive to the short-stories treatment — reports the opposite
• The experimental group's speaking scores improved significantly from pretest to posttest after metadiscourse instruction — related
• The control group's grammar scores also increased significantly from pretest to posttest without any error correction session — related