Claims

Within the experimental group, pre-to-post gains in prosodic ability were significant, while the control group's pre-to-post change was not

Claim · All claims
Evidence · 1 study (2 entries) · causal r1 · q2
Currency · newest study 2018 · not yet checked against its sources · not reviewed by a person

Subclaims

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q2 i? The experimental group's pre-test to post-test difference was significant (sig. .000, p<0.05). → Namaziandost 2018 q2 i? The control group's pre-test to post-test difference was not significant (sig. .321 at df 19). → Namaziandost 2018 (2)

Evidence

Namaziandost 2018

Namaziandost, E., Esfahani, F. R., & Hashemifarnia, A. (2018). The Impact of Using Authentic Videos on Prosodic Ability among Foreign Language Learners. International Journal of Instruction, 11(4), 375-390. https://eric.ed.gov/?id=EJ1191678

q2 · i? · causal · r1

Paired samples t-test on the experimental group's pre- and post-test totals (Table 10): mean paired difference 12.400, t = 5.770, df 19, sig. .000 — "the difference between the post -test and pre -test of the experimental group is significant". No effect size printed.

"But, since the sig. (.000) for experimental group i s less than 0.05 (p<0.05); the difference between the post -test and pre -test of the experimental group is significant."

Namaziandost 2018 (2)

Namaziandost, E., Esfahani, F. R., & Hashemifarnia, A. (2018). The Impact of Using Authentic Videos on Prosodic Ability among Foreign Language Learners. International Journal of Instruction, 11(4), 375-390. https://eric.ed.gov/?id=EJ1191678

q2 · i? · causal · r1

Paired samples t-test on the control group's totals (Table 10): mean paired difference 1.250, t = 1.019, df 19, sig. .321 — "not significant". This is a non-significant test with no printed effect size, so it does not establish equivalence.

"Table 10 indicates that the sig. for control group at df 19 is (.321) which is higher than (0.05); therefore, the difference between the post -test and pre -test of the control group is not significant."

Discussion

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