Psychological tests by the author of “R. M. Yerkes”

Take free, research-backed psychological tests and get clear, private results in minutes.

All tests

Personality Mental States: quiet self-check in a clinic.
  • hopelessness
  • loneliness
Personality Mental States Inventory (PII)
36 questions7 min
In routine clinical and counseling settings, it can be helpful to efficiently characterize internal experiences that may be interfering with day-to-day functioning. The P...
Research-backed
Every test is validated and drawn from peer-reviewed clinical research.
Private by default
Your answers are encrypted, never sold and never shared with anyone.
Instant results
Get a clear, readable interpretation the moment you finish.