A researcher,who predicts that left-handers are better artists than right-handers,watches people draw and evaluates their art.What would be the most important way to improve this study?
A)Randomly assign people to being left- or right-handed.
B)Evaluate their music as well as their art.
C)Use a "blind" observer.
D)Be sure to have an equal number of left- and right-handers.

Question

A researcher,who predicts that left-handers are better artists than right-handers,watches people draw and evaluates their art.What would be the most important way to improve this study?​
A)Randomly assign people to being left- or right-handed.
B)​Evaluate their music as well as their art.
C)​Use a "blind" observer.
D)​Be sure to have an equal number of left- and right-handers.

Quizplus · Accepted Answer

Using a "blind" observer means that the person evaluating the art does not know the handedness of the artist, which eliminates any potential bias towards left- or right-handers. This improves the study's validity and reliability as a result. Randomly assigning people to being left- or right-handed (Option A) and having an equal number of left- and right-handers (Option D) are both good ideas, but they may not be feasible since left-handers make up a smaller percentage of the population. Evaluating their music as well as their art (Option B) may not be relevant to the researcher's hypothesis.

A Researcher,who Predicts That Left-Handers Are Better Artists Than Right-Handers,watches