• Publications
  • Influence
The presence of a dog attenuates cortisol and heart rate in the Trier Social Stress Test compared to human friends
Limited research has addressed how social support in the form of a pet can affect both sympathetic and hypothalamic–pituitary–adrenal reactivity in response to a psychological challenge. The presentExpand
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Diurnal and Seasonal Cortisol, Testosterone, and DHEA Rhythms in Boys and Girls during Puberty
Diurnal and seasonal rhythms of cortisol, testosterone, and DHEA were examined, as little is known about the relationship between these rhythmicities and pubertal development. Salivary samples wereExpand
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Low digit ratio (2D:4D) is associated with delayed menarche
  • Robert L. Matchock
  • Medicine, Psychology
  • American journal of human biology : the official…
  • 1 July 2008
The prenatal environment of the human fetus is now known to have lasting physiological and behavioral effects into childhood and adulthood. The objective of this study was to examine the relationshipExpand
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Family composition and menarcheal age: Anti‐inbreeding strategies
Family composition (e.g., the absence of a father) is associated with pubertal timing in women, although the socioendocrinology of the human primate is poorly understood. To better understand socialExpand
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Chronotype and time-of-day influences on the alerting, orienting, and executive components of attention
Recent research on attention has identiWed three separable components, known as alerting, orienting, and executive functioning, which are thought to be subserved by distinct neural networks. DespiteExpand
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Chronotype and time-of-day influences on the alerting, orienting, and executive components of attention
Recent research on attention has identified three separable components, known as alerting, orienting, and executive functioning, which are thought to be subserved by distinct neural networks. DespiteExpand
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  • PDF
Susceptibility to nausea and motion sickness as a function of the menstrual cycle.
PURPOSE The present study examined whether susceptibility to nausea and other symptoms of vection-induced motion sickness vary as a function of phase of the menstrual cycle, as research findings inExpand
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Circadian and sleep episode duration influences on cognitive performance following the process of awakening.
The process of waking up from an episode of sleep can produce temporary deficits in cognitive functioning and low levels of alertness and vigilance, a process referred to as sleep inertia. CognitiveExpand
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Pet ownership and physical health
Purpose of review Pet ownership and brief human–animal interactions can serve as a form of social support and convey a host of beneficial psychological and physiological health benefits. This articleExpand
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Seasonal rhythms of menarche in the United States: correlates to menarcheal age, birth age, and birth month.
PURPOSE To examine the seasonality of menarche in a large sample of women from the United States. METHODS Retrospective data were collected on month of birth and menarche, age of menarche, andExpand
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