Related Experiment Video
Updated: Aug 8, 2026

An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents
Published on: December 2, 2015
Immunological variability associated with experimentally-induced positive and negative affective states
A D Futterman1, M E Kemeny, D Shapiro
1Department of Psychology, UCLA, School of Medicine.
Experiencing emotions like happiness, anxiety, and depression causes immune system fluctuations. Anxiety led to the most immune variability, while depression showed the least, compared to a neutral state.
Area of Science:
- Psychoneuroimmunology
- Affective science
- Immunology
Background:
- The interplay between psychological states and immune system function is complex.
- Understanding how different emotions impact immunological parameters is crucial for health research.
Purpose of the Study:
- To investigate the effects of experimentally induced affective states on immunological parameters.
- To compare immune system variability across positive (happiness), negative (anxiety, depression), and neutral states.
Main Methods:
- Five healthy subjects underwent induced affective states (happiness, anxiety, depression, neutral).
- Functional and phenotypic immunological parameters were measured immediately before, after, and 30 minutes post-induction.
Main Results:
- All induced affective states resulted in greater immune fluctuations than the neutral state.
- Anxiety induced the highest degree of immunological variability.
- Depression induced the least immunological variability among the affective states.
Conclusions:
- Short-term affective states significantly influence immune system dynamics.
- The intensity of immune system response varies depending on the specific emotion experienced.
Related Concept Videos
Cognitive Theories: Schachter-Singer Theory of Emotion
Physiological Arousal and Cognitive Labeling
According to this theory, when an individual experiences physiological...
Facial Feedback Hypothesis
Traits, Mood, and Subjective Wellbeing
Neuroticism and Emotional...
The Influence of Affect on Cognition
The Influence of Cognition on Affect

