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Related Experiment Video

Updated: Jun 25, 2026

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World

Published on: April 7, 2020

Implicit but not explicit affectivity predicts circadian and reactive cortisol: using the implicit positive and

Markus Quirin¹, Miguel Kazén, Sonja Rohrmann

¹Department of Psychology, University of Osnabrück, Germany. mquirin@uos.de

Journal of Personality

|February 5, 2009

Summary

Implicit affectivity, not self-reported, predicts cortisol regulation. Implicit positive affectivity influences baseline cortisol, while implicit negative affectivity predicts stress responses, highlighting their distinct roles in endocrine processes.

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Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory

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Published on: June 18, 2014

Area of Science:

Psychology
Endocrinology
Psychophysiology

Background:

Self-report measures capture conscious mental states, while implicit measures assess automatic processes outside awareness.
Self-report affectivity often shows weak links to endocrine stress responses.
Implicit measures of affectivity have been underexplored in relation to endocrine processes.

Purpose of the Study:

To investigate if implicit affectivity, assessed by the Implicit Positive and Negative Affect Test (IPANAT), predicts cortisol regulation.
To examine the differential roles of implicit positive and negative affectivity in baseline and stress-induced cortisol release.

Main Methods:

Two studies were conducted to assess the relationship between implicit affectivity and cortisol regulation.
Cortisol levels were measured in relation to circadian rhythms and acute stress responses.
Implicit affectivity was assessed using the Implicit Positive and Negative Affect Test (IPANAT).

Main Results:

Implicit low positive affectivity predicted circadian cortisol release in Study 1.
Implicit negative affectivity predicted the cortisol response to acute stress in Study 2.
Self-reported affectivity did not predict any cortisol regulation measures.

Conclusions:

Implicit affectivity measures are valuable for studying individual differences in endocrine stress responses.
Implicit positive and negative affectivity play distinct roles in baseline and stress-contingent cortisol release.
Findings suggest implicit measures offer unique insights into the interplay between affect and the endocrine system.