Question

a scientist wants to compare how a virus, computer and a dog responds to stimuli. the scientist tests this by calling the item by name (ex: hey, siri) and counts how many times it responds within three trials. they also run one trial without calling to see how many times each responds. a. identify the independent variable in this investigation. b. identify the control group in this investigation. c. identify the dependent variable in this investigation. d. how many trials should be completed for each item?

Explanation:

Step1: Define independent variable

The independent variable is what the scientist changes. Here, it's whether the item is called by name or not.

Step2: Define control group

The control group is the group not receiving the treatment. In this case, it's the trial without calling.

Step3: Define dependent variable

The dependent variable is what is being measured. Here, it's the number of responses.

Step4: Determine number of trials

The scientist runs three trials when calling and one without calling, so four trials in total for each item.

Answer:

A. Whether the item is called by name or not
B. The trial without calling
C. The number of responses
D. 4