Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Mean free path and Mean free time01:22

Mean free path and Mean free time

5.0K
Consider the gas molecules in a cylinder. They move in a random motion as they collide with each other and change speed and direction. The average of all the path lengths between collisions is known as the "mean free path."
5.0K
Path Between Thermodynamics States01:21

Path Between Thermodynamics States

3.9K
Consider the two thermodynamic processes involving an ideal gas that are represented by paths AC and ABC in Figure 1:
3.9K
Interference: Path Lengths01:10

Interference: Path Lengths

1.9K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.9K
Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion03:48

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

31.2K
Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
31.2K
Case Studies01:22

Case Studies

13.4K
There are many research methods available to psychologists in their efforts to understand, describe, and explain behavior and the cognitive and biological processes that underlie it.
13.4K
Qualitative Analysis03:46

Qualitative Analysis

23.8K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
23.8K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Reliability and construct validity of the Hungarian version of Skindex-Mini.

PloS one·2026
Same author

Psychological predictors of blood and plasma donation: Personality traits, personal values, and beliefs influencing donor behavior.

Transfusion and apheresis science : official journal of the World Apheresis Association : official journal of the European Society for Haemapheresis·2026
Same author

[The role of psychological factors in the frequency and experience of menstrual symptoms: negative affect and somatosensory amplification].

Orvosi hetilap·2026
Same author

Exploring early maladaptive schemas in healthy eating and orthorexia nervosa tendencies: a structural equation modeling approach.

Journal of eating disorders·2026
Same author

Eco-Anxiety Without Borders: A Cross-National Study on Climate Perceptions, Beliefs About Government Climate Action, and Climate Concern.

The International journal of social psychiatry·2025
Same author

"Beyond the bubble"-a mixed-methods evaluation of an online psychosocial pilot program for caregivers of children with life-threatening food allergies.

Journal of pediatric psychology·2025

Related Experiment Video

Updated: Jan 23, 2026

Caffeine Extraction, Enzymatic Activity and Gene Expression of Caffeine Synthase from Plant Cell Suspensions
09:11

Caffeine Extraction, Enzymatic Activity and Gene Expression of Caffeine Synthase from Plant Cell Suspensions

Published on: October 2, 2018

13.3K

Morningness-eveningness and caffeine consumption: A largescale path-analysis study.

Csilla Ágoston1, Róbert Urbán1, Adrien Rigó1

  • 1a Institute of Psychology, ELTE Eötvös Loránd University , Budapest , Hungary.

Chronobiology International
|June 21, 2019
PubMed
Summary

Evening chronotypes show higher caffeine use disorder risk. Tea consumption, linked to morning types, correlates with better wellbeing, unlike energy drinks which pose risks for evening types.

Keywords:
Caffeinecaffeine use disorderchronotypemorningnesswellbeing

More Related Videos

Experimental Protocol for Examining Behavioral Response Profiles in Larval Fish: Application to the Neuro-stimulant Caffeine
08:33

Experimental Protocol for Examining Behavioral Response Profiles in Larval Fish: Application to the Neuro-stimulant Caffeine

Published on: July 24, 2018

11.7K
Analysis of Non-Human Primate Pancreatic Islet Oxygen Consumption
07:12

Analysis of Non-Human Primate Pancreatic Islet Oxygen Consumption

Published on: December 18, 2019

5.8K

Related Experiment Videos

Last Updated: Jan 23, 2026

Caffeine Extraction, Enzymatic Activity and Gene Expression of Caffeine Synthase from Plant Cell Suspensions
09:11

Caffeine Extraction, Enzymatic Activity and Gene Expression of Caffeine Synthase from Plant Cell Suspensions

Published on: October 2, 2018

13.3K
Experimental Protocol for Examining Behavioral Response Profiles in Larval Fish: Application to the Neuro-stimulant Caffeine
08:33

Experimental Protocol for Examining Behavioral Response Profiles in Larval Fish: Application to the Neuro-stimulant Caffeine

Published on: July 24, 2018

11.7K
Analysis of Non-Human Primate Pancreatic Islet Oxygen Consumption
07:12

Analysis of Non-Human Primate Pancreatic Islet Oxygen Consumption

Published on: December 18, 2019

5.8K

Area of Science:

  • Psychology
  • Neuroscience
  • Public Health

Background:

  • Chronotype influences daily rhythms and behaviors.
  • Caffeine consumption (CC) and caffeine use disorder (CUD) prevalence and risk factors require further investigation.
  • The interplay between chronotype, CC, CUD, and overall wellbeing remains unclear.

Purpose of the Study:

  • To investigate the relationship between chronotype, caffeine consumption, caffeine use disorder, and wellbeing.
  • To explore how different caffeine-containing beverages mediate these relationships.
  • To identify potential chronotype-specific risks associated with caffeine consumption.

Main Methods:

  • An online survey was conducted in Hungary with 2259 participants.
  • Validated questionnaires were used: CUD Questionnaire, Morningness-Eveningness Questionnaire, and WHO-5 Well-Being Index.
  • Path modeling was employed to analyze the relationships between variables.

Main Results:

  • Morningness was positively associated with tea consumption and negatively with cola and energy drink consumption.
  • Severe CUD was more prevalent in evening-type individuals.
  • Significant mediations indicated that morningness influences wellbeing via tea consumption, and eveningness influences CUD via energy drink consumption.

Conclusions:

  • Caffeine use disorder is associated with eveningness, similar to other substance use disorders.
  • The type of beverage carrying caffeine significantly impacts consequences.
  • Energy drink consumption poses greater risks, particularly for evening types, while tea consumption is linked to more favorable wellbeing outcomes.