Independent Variable: Presence Of A Buzzer Sound Or Not.

 

 

Design an experiment with one independent variable (with at least two levels) and one dependent variable. Additionally, what levels of measurement would you use when collecting your data?

Example: XYZ hospital wanted to increase compliance of staff using hand sanitizer after every interaction with a patient. In order to gain compliance, they set up a buzzer when staff exited the patient’s room. For the treatment group, a buzzer would ring for 1 second after exiting the room unless staff had pressed the hand sanitizer lever. The control group did not have the buzzer activated, so no sound would emit when exiting the patient’s room.

Independent Variable: Presence of a buzzer sound or not.

Dependent Variable: Number of times the hand sanitizer lever was pressed.

Level of Measurement: Ratio
In your responses to other students, identify a strength or weakness of another student’s example design.

Initial discussion question posts should be a minimum of 200 words and include at least two references cited using APA format. Responses to peers or faculty should be 100-150 words and include one reference. Refer to “HLT-362V Discussion Question Rubric” and “HLT-362V Participation Rubric,” located in Class Resources, to understand the expectations for initial discussion question posts and participation posts, respectively

 

 

Sample Solution

Experiment Design with One Independent Variable (with at least two levels) and One Dependent Variable

Research Question:

What is the effect of using a reminder system on the number of times people use hand sanitizer?

Independent Variable:

Presence of a reminder system (two levels: yes or no)

Dependent Variable:

Number of times hand sanitizer is used

Level of Measurement:

Ratio

Experimental Procedure:

  1. Randomly assign participants to either the treatment group (reminder system) or the control group (no reminder system).
  2. Place hand sanitizer dispensers in a location that is easily accessible to all participants.
  3. In the treatment group, install a reminder system that will emit a sound or alert when a participant passes by.
  4. In the control group, do not install a reminder system.
  5. Observe and record the number of times each participant uses hand sanitizer over a period of time.

Data Analysis:

Use a statistical test, such as an independent samples t-test, to compare the number of times participants in the treatment group use hand sanitizer to the number of times participants in the control group use hand sanitizer.

Hypothesis:

Participants in the treatment group will use hand sanitizer more often than participants in the control group.

Strengths and Weaknesses of the Experimental Design

One strength of this experimental design is that it is well-controlled. The independent variable is clearly defined and manipulated, and the dependent variable is measured objectively. Additionally, the participants are randomly assigned to groups, which helps to reduce bias.

One weakness of this experimental design is that it is artificial. The participants are aware that they are participating in an experiment, which may affect their behavior. Additionally, the experiment is conducted in a laboratory setting, which may not be representative of the real world.

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