Related Experiment Video
Updated: Jan 22, 2026
08:17
Reducing State Anxiety Using Working Memory Maintenance
Published on: July 19, 2017
8.1K
Differential associations between chronotype, anxiety, and negative affect: A structural equation modeling approach
Rebecca C Cox1, Bunmi O Olatunji1
1Department of Psychology, Vanderbilt University, 301 Wilson Hall, 111 21st Avenue South, Nashville, TN 37240, USA.
Journal of Affective Disorders
|July 15, 2019
Summary
Chronotype, or an individual's natural sleep-wake cycle, is uniquely linked to anxiety symptoms, even when accounting for sleep disturbances. This suggests circadian disruption may play a role in anxiety disorders.
Area of Science:
- Psychiatry
- Sleep Medicine
- Chronobiology
Background:
- Circadian rhythms and chronotype are increasingly linked to anxiety.
- The role of sleep disturbance in this relationship requires clarification.
- A unique link between chronotype and anxiety, distinct from negative affect, needs establishment.
Purpose of the Study:
- To determine if chronotype has a unique association with anxiety symptoms.
- To control for the confounding effects of sleep disturbance.
- To differentiate the chronotype-anxiety link from negative affect.
Main Methods:
- A multimethod approach was used over 9 days in 151 adults.
- Subjective and behavioral measures assessed chronotype, sleep disturbance, anxiety, and negative affect.
- Structural equation modeling analyzed associations between latent constructs.
Main Results:
- Sleep disturbance significantly correlated with both anxiety and negative affect.
- Chronotype showed a significant association with anxiety, independent of sleep disturbance.
- The link between chronotype and negative affect was not significant after controlling for sleep.
Conclusions:
- Chronotype plays a unique role in anxiety symptoms.
- Circadian disruption may be a potential biological mechanism underlying anxiety disorders.
- Findings highlight the importance of considering chronotype in anxiety research and treatment.
Related Concept Videos
01:26Transmission-Line Differential Equations
981
Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from...
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from...
981
01:17Differential Form of Maxwell's Equations
1.2K
James Clerk Maxwell (1831–1879) was one of the significant contributors to physics in the nineteenth century. He is probably best known for having combined existing knowledge of the laws of electricity and the laws of magnetism with his insights to form a complete overarching electromagnetic theory, represented by Maxwell's equations. The four basic laws of electricity and magnetism were discovered experimentally through the work of physicists such as Oersted, Coulomb, Gauss, and...
1.2K
02:59The Nernst Equation
46.7K
Nonstandard Reaction Conditions
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
46.7K
02:55Thermochemical Equations
35.8K
For a chemical reaction (the system) carried out at constant pressure – with the only work done caused by expansion or contraction – the enthalpy of reaction (also called the heat of reaction, ΔHrxn) is equal to the heat exchanged with the surroundings (qp).
35.8K
02:48Henderson-Hasselbalch Equation
75.8K
The ionization-constant expression for a solution of a weak acid can be written as:
75.8K
02:35Clausius-Clapeyron Equation
62.6K
The equilibrium between a liquid and its vapor depends on the temperature of the system; a rise in temperature causes a corresponding rise in the vapor pressure of its liquid. The Clausius-Clapeyron equation gives the quantitative relation between a substance’s vapor pressure (P) and its temperature (T); it predicts the rate at which vapor pressure increases per unit increase in temperature.
62.6K