Linda usually listens to music on her iPod while studying. When the volume is initially low, raising it by five decibels is highly noticeable. However, when the volume is initially high, increasing it by five decibels does not result in a noticeable change in sound. This phenomenon is best explained by .A. the volley principle
B. Weber's law
C. perceptual constancy
D. selective attention

B. Weber's law        

Explanation:

Weber's law: In psychology, the term "Weber's law" is also denoted as "Weber-Fechner law", and is defined as an important psychological law that quantifies the change of perception in a particular stimulus.

Weber's law signifies that a specific change in a particular stimulus will be considered as "just noticeable" and it would be denoted as a constant ratio of the actual or original stimulus.

In the question above, the given statement represents "Weber's law".

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.