Question

a team of researchers is testing the effectiveness of a new hpv vaccine. they randomly divide the subjects into two groups.

group 1 receives new hpv vaccine, and group 2 receives existing hpv vaccine.

neither the patients or the doctors examining them knew which group they were in.

which is the treatment group?
group 1
group 2
neither group

which is the control group (if there is one)?
group 1
group 2
no control group

is this study blind, double blind, or neither?
blind
double-blind
neither

which best describes this research?
controlled experiment
placebo controlled experiment
experiment
survey

Explanation:

🆕 New Concept Discovered: Experimental Design
How researchers structure studies to test causes and effects.

Step 1: Identify the Treatment Group

The treatment group is the group of subjects receiving the specific treatment being tested. In this study, the researchers are testing the effectiveness of a new HPV vaccine.

• Group 1 receives the new HPV vaccine.
• Group 2 receives the existing HPV vaccine.

Therefore, Group 1 is the treatment group.

Step 2: Identify the Control Group

The control group serves as a baseline for comparison. It does not receive the new treatment being tested; instead, it receives either a standard treatment (active control) or an inactive substance (placebo).

Here, Group 2 receives the existing, standard HPV vaccine to serve as a baseline comparison for the new one.

Therefore, Group 2 is the control group.

Step 3: Determine Blinding Level

Blinding prevents bias by hiding who is receiving which treatment.

• Single-blind: Only the patients do not know which treatment they receive.
• Double-blind: Neither the patients nor the doctors/researchers interacting with them know who is in which group.

The prompt states: "Neither the patients or the doctors examining them knew which group they were in."

Therefore, this study is Double-blind.

Step 4: Describe the Research Type

Let's evaluate the options for describing this research:

• Survey: Simply collects data without manipulating variables. (Incorrect)
• Experiment: A broad term, but we can be more specific.
• Placebo Controlled Experiment: An experiment where the control group receives an inactive substance (placebo) like a sugar pill or saline injection. Since Group 2 receives an active, existing vaccine rather than a placebo, this is not a placebo-controlled experiment. (Incorrect)
• Controlled Experiment: An experiment where researchers actively manipulate an independent variable (the type of vaccine) and compare a treatment group against a control group under controlled conditions.

Therefore, this is best described as a Controlled Experiment.

Answer:

1. Which is the treatment group?

• Group 1

1. Which is the control group (if there is one)?

• Group 2

1. Is this study blind, double blind, or neither?

• Double-blind

1. Which best describes this research?

• Controlled Experiment