Accession Number: 1989-52579-001. First Author & Affiliation: Olson, Karen L.; Wayne State U, MI, US. Other Journal Titles: Dissertation Abstracts International: Section B: The Sciences and Engineering. Release Date: 19890601. Publication Type: Dissertation Abstract, (0400); . Media Covered: Print. Media Available: Electronic; Print. Document Type: Dissertation. Language: English. Major Descriptor: Emotions; Facial Expressions; Infant Vocalization; Social Perception. Classification: Psychosocial & Personality Development (2840) . Population: Human (10); . Age Group: Childhood (birth-12 yrs) (100) Infancy (2-23 mo) (140) Adulthood (18 yrs & older) (300) . Methodology: Empirical Study