Psychologist Carolyn Rovee-Collier Placed Babies on Their Backs Under a Colorful

question 41

Multiple Choice

Psychologist Carolyn Rovee-Collier placed babies on their backs under a colorful crib mobile and tied a ribbon around the baby's ankle, connecting it to the mobile. Whenever the babies spontaneously kicked their legs, the mobile jingled and rattled. Within minutes, infants as young as what age learned to control their movements and kick faster to move the mobile more?

• A)three months
• B)six months
• C)nine months
• D)12 months

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Definitions:

dB

A unit of measurement that indicates the relative loudness of sounds in terms of the logarithmic scale, with higher numbers representing louder sounds.

Amplitude

Stimulus intensity; in audition, roughly equivalent to loudness, graphed by the increasing height of a sound wave.

Loudness

Loudness is the subjective perception of the intensity of sound, often measured in decibels, influencing how sound is experienced.

Frequency

The number of occurrences of a repeating event per unit of time, often used in the context of waves or cycles.