Improving Experimental Design in Plant Growth Study

Very Easy Research Summaries Experimental Design

A group of researchers conducted an experiment to determine the effect of sunlight on the growth of two different species of plants: species A and species B. They set up two groups of each species: one group was placed in direct sunlight for 8 hours a day, while the other group was kept in a shaded area for the same period. The researchers measured the height of the plants after four weeks and recorded the average height of each group.

Which of the following describes a potential improvement to the experimental design?

Include a third group of plants that receive 4 hours of sunlight daily.

Only use one species of plant for a more controlled experiment.

Measure plant height every week instead of just at the end.

Conduct the experiment indoors to control external variables.

Hint

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