If a Key Is Pressed on a Piano, the Frequency

question 41

Multiple Choice

If a key is pressed on a piano, the frequency of the resulting sound waves will determine the , and the amplitude will determine the of the perceived musical note.

• A)timbre; intensity
• B)intensity; timbre
• C)loudness; pitch
• D)pitch; loudness

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Definitions:

Independent Variable

In experimental studies, this is the variable that the researcher alters to examine its impact on the dependent variable.

Dependent Variable

The variable in an experiment that is expected to change in response to manipulations of the independent variable.

Confound

A variable that influences both the dependent and independent variables in a study, potentially skewing results and making it difficult to determine causality.

Institutional Review Board

A committee that reviews and approves research protocols to ensure ethical standards are maintained in studies involving human participants.