![]() ![]() Negative control increases the reliability of the experiment.Ĭontrols are essential elements of an experiment. Positive control increases the reliability of the experiment. Negative control is also an important part of an experiment Positive control is an important part of an experiment. Negative control is an experimental treatment which does not result in the desired outcome of the experiment. Positive control is an experimental treatment which is performed with a known factor to get the desired effect of the treatment. If you observed a prominent growth inhibition zone around the disk in the positive control, it says that the experimental setup is working well without errors. ![]() It produces a prominent bacterial growth inhibition zone around the positive control disk as shown in figure 01. For example, when testing a plant extract for antimicrobial properties in antimicrobial compound experiment, a known antimicrobial compound containing solution is used as a positive control. Therefore researcher can identify and optimize the procedure without wasting time, effort and the money. If experimental errors occur, positive control will not produce the correct outcome. Positive control is a useful proof to show that the protocols, reagents and the equipment are functioning well without any errors. However, it shows the desired effect which is expected from the independent variable. It does not have the independent variable that researcher tests. Positive control is an experimental control which gives a positive result. Side by Side Comparison – Positive vs Negative Control Thus, the key difference between the positive and negative control is, positive control produces a response or a desired effect while negative control produces no response or no desired effect of the experiment.Ĥ. Negative control is an experimental treatment which does not result in the desired effect of the experimental variable. Positive control is an experimental treatment which results in the desired effect the researcher expects. Negative and positive controls are defined based on the variables or the treatments of the experiment. There are two types of control treatments known as positive control and negative control. Therefore, it is of utmost important to maintain control experiments and they should be included into the experimental design to increase the statistical validity of the data set. The results gained from the experiment can be critically compared, analyzed and explained with respect to the control treatments. ![]() Scientific experiments are always performed with controls to obtain reliable results. Key Difference – Positive vs Negative Control ![]()
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