title: Response to de la Iglesia et al.
abstract: We wish to respond to the commentary of de la Iglesia et al. [1]. Studies comparing sleep in different communities have different goals. One frequent goal has been to determine how sleep is affected by manipulating specific 'modern' conditions. Many studies have investigated the effect of artificial light and electronic entertainment. Such studies have clearly shown that light, particularly blue light, delays sleep onset [2]. Studying the effect of artificial light on sleep was not a goal of our study.
authors.affiliation: Department of Anthropology, University of New Mexico, MSC01-1040, Albuquerque, NM 87131, USA.
authors.forename: Gandhi
authors.initials: G
authors.lastname: Yetish
authors.affiliation: Department of Anthropology, University of New Mexico, MSC01-1040, Albuquerque, NM 87131, USA.
authors.forename: Hillard
authors.initials: H
authors.lastname: Kaplan
authors.affiliation: Department of Anthropology, University of California, Santa Barbara, 1210 Cheadle Hall, CA 93106, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Gurven
authors.affiliation: Department of Anthropology, Yale University, 10 Sachem Street, New Haven, CT 06511, USA.
authors.forename: Brian
authors.initials: B
authors.lastname: Wood
authors.affiliation: Department of Anthropology, Hunter College, 695 Park Ave, New York, NY 10065, USA.
authors.forename: Herman
authors.initials: H
authors.lastname: Pontzer
authors.affiliation: School of Anatomical Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa.
authors.forename: Paul R
authors.initials: PR
authors.lastname: Manger
authors.affiliation: Department of Neurology and Brain Research Institute, University of California at Los Angeles, 10833 Le Conte Ave, Los Angeles, CA 90095, USA.
authors.forename: Charles
authors.initials: C
authors.lastname: Wilson
authors.affiliation: Department of Psychiatry and Biobehavioral Sciences, University of California at Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Ronald
authors.initials: R
authors.lastname: McGregor
authors.affiliation: Department of Psychiatry and Biobehavioral Sciences, University of California at Los Angeles, Los Angeles, CA 90095, USA; VA Greater Los Angeles Healthcare System, 16111 Plummer St., Los Angeles, CA 91343, USA; Brain Research Institute, University of California at Los Angeles, Los Angeles, CA 90095, USA. Electronic address: jsiegel@ucla.edu.
authors.forename: Jerome M
authors.initials: JM
authors.lastname: Siegel
mesh_terms: D008027:Light; D012890:Sleep