Question

A researcher believes consuming hot tea can act as a memory aid. Subjects consume cold beverages and have their memory tested through a test of recall of a series of picture cards. Other subjects consume tea and have their memory tested in a similar fashion. The researcher decides to allow a third group to be tested after consumption of hot water without tea. Why did the researcher include this third group?

Answer 1

The most likely reason the researcher included the third group is:

D. to act as a control (to see if memory was aided by hot beverages or just the tea)

Including a control group allows the researcher to compare the effects of hot water without tea to the effects of hot tea. This helps in isolating the specific impact of tea on memory, as opposed to the general effect of consuming a hot beverage.

A control group is an essential component in experimental design to help researchers make meaningful comparisons and draw reliable conclusions. In this case, the researcher is investigating the potential memory-aiding effects of hot tea. By including a control group that consumes hot water without tea, the researcher can differentiate between the effects of the hot beverage itself and the potential additional benefits attributed to the tea.

Answer 2

Hello!

Considering the information contained in the exercise, we know that:

He tested:

• consuming cold beverages;

,

• consuming hot tea

Now, he wants to test the consumption of hot water to act as a control and check if the memory was aided by the tea or just hot beverages).

Answer:

Alternative D.