title: Introduction to the special section: in search of a double paradigm.
authors.affiliation: Behavioral Medical Research Center, Duke University Medical Center, Durham, North Carolina 27710, USA. is@bmrc.mc.duke.edu
authors.forename: I C
authors.initials: IC
authors.lastname: Siegler
authors.forename: P P
authors.initials: PP
authors.lastname: Vitaliano
mesh_terms: D000368:Aged; D000375:Aging / Q000523:psychology*; D001294:Attitude to Health; D005853:Geriatrics / Q000639:trends; D015438:Health Behavior; D006801:Humans; D011584:Psychology / Q000639:trends*