Mood & depression
How mood symptoms emerge, persist and intersect with insomnia, fatigue and everyday functioning.
Explore related Sleep-EVAL workPSYCHIATRIC EPIDEMIOLOGY · CLINICAL INFERENCE
Understanding mental health in the context of everyday life.
Psy-EVAL brings together research on psychiatric symptoms, their patterns across populations, and their connections with sleep and physical health. It is part of the EVAL Research Institute’s work on structured clinical assessment.
An independent EVAL program at psyeval.com
01 / OVERVIEW
A connected view
Mental health rarely fits into a single category.
Psy-EVAL was the original EVAL research program. Psychiatric experiences often overlap with sleep difficulties, physical conditions and changes in daily functioning. Psy-EVAL organizes this complexity into questions that can be studied consistently across people, places and time.
From individual symptoms to population patterns, the goal is research that keeps the clinical context visible.
02 / RESEARCH
Questions we study
Each theme can be examined on its own and in relation to sleep, health and functioning.
Anxiety & distress
Patterns of anxiety, irritability and distress in population research, including their overlap with other symptoms.
Watch symposium presentationsSleep & mental health
The two-way relationship between psychiatric symptoms, sleep disorders and circadian timing.
Explore related Sleep-EVAL workComorbidity & trajectories
How conditions cluster, change over time and affect recognition of disorders in the community.
Read the research aims03 / APPROACH
Structured questions. Interpretable reasoning.
The EVAL research approach connects clinical knowledge with epidemiological methods.
THE RESEARCH FRAMEWORK
The EVAL research program began with Psy-EVAL. Sleep-EVAL developed in the early 1990s as a related program devoted to sleep. Their shared research tradition uses structured interviews and knowledge-based clinical inference to study symptoms in context.
Explore Psy-EVAL and Ad-Infer01
Collect
Use consistent, structured questions to document symptoms and context.
02
Connect
Examine co-occurring experiences and possible patterns across domains.
03
Study
Analyze population variation and change over time with clinical meaning in view.
This is a research information site. It does not provide a personal diagnosis, treatment, or an emergency service.
04 / CONNECTED RESEARCH
A bridge between sleep and psychiatry.
Sleep-EVAL and Psy-EVAL address related questions from complementary perspectives. The research considers sleep symptoms alongside psychiatric, neurological and medical conditions rather than treating them as isolated findings.
Visit Sleep-EVALRELATED THEMES
- Insomnia and depression
- Sleep disruption and anxiety
- Daytime functioning
- Longitudinal phenotyping
05 / RESOURCES
Follow the research
Publications, symposia and related programs from the EVAL research community.
SYMPOSIA
Research conversations on video
Presentations on depression, irritability, sleep and related topics.
↗VIDEO CHANNELEVALRI on YouTube
Explore the institute’s presentations and scientific discussions.
↗PUBLICATIONSResearch reading room
Find source pages, publications and related research programs.
↗06 / ABOUT
An EVAL Research Institute initiative.
EVAL Research Institute is an independent research organization based in California. Psy-EVAL provides a focused place for its psychiatry and mental health research, alongside the institute’s broader programs.