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:

A. The independent variable is what the scientist manipulates. Here, it's whether the item is called by name or not.
B. The control group is the group not receiving the treatment. In this case, it's the trial without calling the item by name.
C. The dependent variable is what is being measured. Here, it's the number of times each item responds.
D. Each item should have 4 trials (3 trials of calling by name and 1 trial without calling).

Answer:

A. Whether the item is called by name
B. The trial without calling the item by name
C. The number of times each item responds
D. 4