Overview
Our lab studies animal communication, asking both proximate and ultimate questions about how signaling systems function and how they evolve. Most of our work is done with birds, although lab members have studied a variety of other taxa. One major theme that runs through our work is to understand how signal reliability (“honesty”) is maintained in the face of the competing evolutionary interests of signal senders and receivers. We use both laboratory experiments and field-based analyses to test hypotheses about the costs of signal production, which theory suggests are necessary to maintain reliability. For example, we have demonstrated that the reliability of birdsong as a signal of quality in the context of mate choice is maintained by variation in the response of young birds to early developmental stress, which in turn affects brain development and song learning. Another theme that runs through our work concerns how animals themselves perceive signals, in particular the role of categorical perception in communication. Our work here began with birdsong, for example demonstrating context-dependent variation in category boundaries that define the smallest acoustic units of song (“notes”), and identifying categorical responses of neurons in the “song system” of the brain to variation in those notes. More recently, we have begun to study categorical perception in visual signaling, demonstrating for example that the carotenoid-based orange-red coloration commonly used in assessment signaling may be perceived categorically. This finding illustrates the connection between our interests in perception and reliability, given that canonical models of reliability assume continuous perception.
Current Appointments & Affiliations
Professor of Biology
·
2002 - Present
Biology,
Trinity College of Arts & Sciences
Associate Chair of the Department of Biology
·
2022 - Present
Biology,
Trinity College of Arts & Sciences
Professor in the Department of Psychology and Neuroscience
·
2008 - Present
Psychology & Neuroscience,
Trinity College of Arts & Sciences
Professor of Neurobiology
·
2010 - Present
Neurobiology,
Basic Science Departments
Professor in the Program in Education
·
2024 - Present
Education Program,
Education
Faculty Network Member of the Duke Institute for Brain Sciences
·
2011 - Present
Duke Institute for Brain Sciences,
University Institutes and Centers
Associate of the Duke Initiative for Science & Society
·
2021 - Present
Duke Science & Society,
University Initiatives & Academic Support Units
Bass Fellow
·
2004 - Present
Biology,
Trinity College of Arts & Sciences
Recent Publications
Backgrounds and the evolution of visual signals.
Journal Article Trends in ecology & evolution · February 2024 Color signals which mediate behavioral interactions across taxa and contexts are often thought of as color 'patches' - parts of an animal that appear colorful compared to other parts of that animal. Color patches, however, cannot be considered in isolation ... Full text CiteHuman-wild bird cooperation.
Journal Article Science (New York, N.Y.) · December 2023 Honeyguides learn distinct signals made by honey hunters from different cultures. ... Full text CiteSyntactic rules predict song type matching in a songbird
Journal Article Behavioral Ecology and Sociobiology · January 1, 2023 Abstract: Song type matching has been hypothesized to be a graded signal of aggression; however, it is often the case that variation in matching behavior is unrelated to variation in aggressiveness. An alternative view is that whether an individual matches ... Full text Open Access CiteRecent Grants
Washington Duke Scholars Program
Institutional SupportPrincipal Investigator · Awarded by Coca-Cola Foundation, Inc. · 2016 - 2021The COMPASS PROJECT
ResearchPrincipal Investigator · Awarded by Howard Hughes Medical Institute · 2014 - 2020Neural Codes for Vocal Sequences
ResearchCo-Principal Investigator · Awarded by National Science Foundation · 2014 - 2020View All Grants
Education, Training & Certifications
Cornell University ·
1984
Ph.D.
Tufts University ·
1978
M.S.
Tufts University ·
1976
B.S.