Researchers looked at the effect of a new medication on the behaviour of horses with anxiety. Horses were randomly assigned to received either the medication or an inactive substance, and their behaviour was observed. The researchers collecting and analysing the data dit not know whether the horses had received the medication or the inactive substance. Use the information about the study to decide if each of the following three statements are TRUE or FALSE. Statement 1 A placebo was not used in this study. Statement 2 Blinding was not used in this study. Statement 3 A control group was not used in this study.
Question
Researchers looked at the effect of a new medication on the behaviour of horses with anxiety. Horses were randomly assigned to received either the medication or an inactive substance, and their behaviour was observed. The researchers collecting and analysing the data dit not know whether the horses had received the medication or the inactive substance. Use the information about the study to decide if each of the following three statements are TRUE or FALSE.
Statement 1
A placebo was not used in this study.
Statement 2
Blinding was not used in this study.
Statement 3
A control group was not used in this study.
Solution
Statement 1: FALSE. A placebo was used in this study. The inactive substance given to some horses serves as a placebo.
Statement 2: FALSE. Blinding was used in this study. The researchers who collected and analysed the data did not know whether the horses had received the medication or the inactive substance.
Statement 3: FALSE. A control group was used in this study. The horses that received the inactive substance serve as the control group.
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