Question
Cats can judge unseen people's positions in space by
the sound of their voices and thus react with surprise
when the same person calls to them from two
different locations in a short span of time. Saho
Takagi and colleagues reached this conclusion by
measuring cats' levels of surprise based on their ear
and head movements while the cats heard recordings
of their owners' voices from two speakers spaced far
apart. Cats exhibited a low level of surprise when
owners' voices were played twice from the same
speaker, but they showed a high level of surprise
when the voice was played once each from the two
different speakers.
According to the text, how did the researchers
determine the level of surprise displayed by the cats
in the study?
A) They watched how each cat moved its ears and
head.
B) They examined how each cat reacted to the voice
of a stranger.
C) They studied how each cat physically interacted
with its owner.
D) They tracked how each cat moved around the
room.
Answer
A) They watched how each cat moved its ears and head.