Document Type

Open Access Thesis

Embargo Period

2-28-2015

Degree Program

Psychology

Degree Type

Master of Science (M.S.)

Year Degree Awarded

2015

Month Degree Awarded

May

Advisor Name

Erik

Advisor Middle Initial

W

Advisor Last Name

Cheries

Third Advisor Name

Neil

Third Advisor Last Name

Berthier

Fourth Advisor Name

Adrian

Fourth Advisor Last Name

Staub

Abstract

Developmental studies have revealed that preschool-aged children believe that an agent’s internal properties are more important than its external properties for determining its identity over time. The current study examined the developmental origins of this understanding using a manual-search individuation task with 13-month-old infants. Subjects observed semi-transparent objects that looked and behaved like animate agents placed into box that they could reach but not see into. Across trials infants observed objects with either the same- or different-colored insides placed into the box. We found that infants used internal property differences more than external property differences to determine how many agents were involved in the event. A second experiment confirmed that this effect was specific to the domain of animate entities. These results suggest that infants are biased to see an agent’s ‘insides’ as more important for determining its identity over time than its outside properties.

Share

COinS