Hannah Wants to See If Her New Technique of Ping-Pong

question 22

Multiple Choice

Hannah wants to see if her new technique of ping-pong playing can decrease the time it takes to finish a ping-pong game. She asks the U.S. Olympic ping-pong team to work with her. Half of the U.S Olympic team is randomly assigned to be taught by the new style, the experimental group, and the other randomly assigned half are not, the control group. Her technique does not significantly decrease the time it takes the experimental group to finish a ping-pong game compared to the control group, perhaps because they are already so good at the sport. This could be an example of

• A) the need for matching groups.
• B) a floor effect.
• C) the need for determining initial comparability.
• D) an internally invalid study.

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Definitions:

Saint Augustine

An early Christian theologian and philosopher whose writings influenced the development of Western Christianity and Western philosophy, especially regarding concepts of original sin and divine grace.

Aristotle

An ancient Greek philosopher and scientist, whose works cover a wide range of subjects and form the basis of Western philosophy.

Aristotle

An ancient Greek philosopher and scientist, one of the greatest intellectual figures of Western history, who made significant contributions to various fields of knowledge.

Plato

An ancient Athenian philosopher, a student of Socrates and teacher of Aristotle, known for his contributions to Western philosophy.