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Morrill, Ryan J.; Paukner, Annika; Ferrari, Pier F.; Ghazanfar, Asif A. – Developmental Science, 2012
Across all languages studied to date, audiovisual speech exhibits a consistent rhythmic structure. This rhythm is critical to speech perception. Some have suggested that the speech rhythm evolved "de novo" in humans. An alternative account--the one we explored here--is that the rhythm of speech evolved through the modification of rhythmic facial…
Descriptors: Language Rhythm, Speech, Primatology, Nonverbal Communication
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Russell, Jamie L.; Lyn, Heidi; Schaeffer, Jennifer A.; Hopkins, William D. – Developmental Science, 2011
The cultural intelligence hypothesis (CIH) claims that humans' advanced cognition is a direct result of human culture and that children are uniquely specialized to absorb and utilize this cultural experience (Tomasello, 2000). Comparative data demonstrating that 2.5-year-old human children outperform apes on measures of social cognition but not on…
Descriptors: Primatology, Social Cognition, Culture, Communication (Thought Transfer)