Final answer:
Infants show increased attention when mothers use elaborate speech or 'motherese', which benefits cognitive and language development from an early age.
Step-by-step explanation:
When mothers use an elaborate speech pattern, often referred to as "motherese," infants generally show increased attention. This type of speech is characterized by a high-pitched, sing-song voice that emphasizes important words and simplifies sentence structure, aiding language development in young children. Studies suggest that infants starting from a very early age, can recognize their mother's voice discern the language spoken by their mothers from foreign tongues, and prefer faces that synchronize with audible language.
This preference aligns with the way infants pay greater attention to human faces and voices, particularly those of their caregivers bolstering social and linguistic interactions. Infants do not show signs of confusion or decreased attention; instead they benefit from the language exposure, which stimulates cognitive and language development.