Many believe that lullabies, characterized by their slow tempos, contain some acoustic features that are universally calming to infants. In a study, Constance M. Bainbridge and colleagues played both a lullaby sung in the Lük Sáami language and a non-lullaby song in the Tundra Nenets language to a group of infants. The researchers also measured the infants’ heart rates, as a reduced heart rate is considered a measure of relaxation. They claim that the lullaby did indeed relax the infants.
Desmos Graphing Calculator
Verbal·Information and Ideas·Command of Evidence
easyWhich finding, if true, would most directly support Bainbridge and colleagues’ claim?
A
The heart rates of infants in the study were more irregular during the lullabies than during the non-lullabies.
B
Infants’ heart rates were substantially lower during the lullaby than during the non-lullaby.
C
Parents of infants in the study chose the lullaby over the non-lullaby when asked which song they would use to calm their child.
D
Both the song in Lük Sáami and the song in Tundra Nenets were sung by a female singer.