The purpose of this experiment is to show whether the vasoconstriction, wrinkles

Question

The purpose of this experiment is to show whether the vasoconstriction, wrinkles, our hands experience when submersed in water serve a function. The hypothesis is that these wrinkles may improve the way our hands function with wet or submerged objects. During the experiment, the participants worked with submerged and dry objects both with wrinkled and unwrinkled fingers. To wrinkle the participant’s hands, they submerged them in a polystyrene container filled with 40ºC water for 30 minutes. To unwrinkled the hands, they’d wash them with soapy water, and dry them, then allow the wrinkles to disappear. In the experiment, they measured how long it took to transfer 45 objects from one container to another by picking them up, passing them through a 5*5 cm hole from one had to another, and putting them into a 5*5 cm hole in the target box lid. They did this when the objects were dry, as well as when the objects were submerged in water. They found out that participants transferred the dry objects quicker than the submerged ones. Also when the fingers were wrinkled for the submerged transfer it took less time to move all the objects than unwrinkled. But for dry objects wrinkles vs. unwrinkled hands made no difference.

Is this exeriment observational or experimental?

Explanation / Answer

In an experiment investigators apply treatments to experimental units (people, animals, plots of land, etc.) and then proceed to observe the effect of the treatments on the experimental units.

In an observational study investigators observe subjects and measure variables of interest without assigning treatments to the subjects. The treatment that each subject receives is determined beyond the control of the investigator.

Based on this definitions we can see that here many expirements were made and then output was observed based on that expirements.

Hence this is experimental.

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