APFIVE Confounding Variables in Experimental Design
Dr. Vasquez studied recovery from stroke-induced language deficits in 60 patients with damage to Broca’s area. Half received traditional speech therapy while half received an experimental treatment combining speech therapy with transcranial magnetic stimulation (TMS) of undamaged language areas. After 6 months, the experimental group showed greater improvement in speech production. What confounding variable could have influenced these results?
A
TMS is not an appropriate treatment method
B
The severity of initial brain damage was not controlled for between groups
C
The sample size was too small
D
The study duration was too short
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | farah.2010.ayman | 1 | 1 | 0m 00s | 100 |
| #2 | goenkaidhika | 1 | 1 | 0m 00s | 100 |
| #3 | dldpwn7424 | 1 | 1 | 0m 00s | 100 |
| #4 | nisak4sh | 1 | 1 | 0m 00s | 100 |
| #5 | tianbo.shen | 1 | 1 | 0m 20s | 80 |
| #6 | devanshs905 | 1 | 1 | 0m 22s | 78 |
| #7 | itslanataher | 1 | 1 | 0m 27s | 73 |
| #8 | anamariamartinezcerrato | 1 | 1 | 0m 31s | 69 |
| #9 | mplocharski63 | 1 | 1 | 0m 35s | 65 |
| #10 | alekhya.cherukuri52 | 1 | 1 | 0m 50s | 50 |
Items per page:
10
1 – 10 of 10