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Psychophysiology (1993). 30(6): 627-634.
Reliable responses to a cardiovascular
reactivity protocol: a replication study in a biracial female sample.
Kamarck TW
Jennings JR Stewart CJ Eddy MJ
Department of Psychology, University of Pittsburgh, PA 15260.
This replication study was designed to examine the reliability of
individual differences in cardiovascular responsivity to a standardized
PC-based cognitive task protocol (Kamarck et al., 1992) in a female
community sample. Thirty women, both black and white (ages 25-44 years),
were administered the protocol twice with a 1-month retest interval
using a mobile laboratory at a community-based testing site. Measures of
heart rate and blood pressure reactivity were obtained comparing
assessments taken at rest and during three protocol tasks. Preejection
period, stroke volume, and total peripheral resistance changes were
estimated using impedance cardiography assessments. As in previous
studies with males, individual differences in heart rate and systolic
and diastolic blood pressure responses to the protocol were highly
reliable (.80 or greater) when data were aggregated across three tasks
and two testing sessions. Reliability of cardiac contractility (preejection
period) and stroke volume changes to these tasks exceeded .70. This
reactivity assessment procedure has now produced reliable results in
three studies and appears to be exportable across diverse samples and
settings.
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