Classical Test Theory, often abbreviated as CTT, is one of the foundational frameworks in psychological and educational measurement. It explains how test scores should be understood when measurement is imperfect. In psychology, education, employment testing, personality assessment, and clinical screening,…

Psychiatry is the branch of medicine devoted to understanding, diagnosing, treating, and preventing mental disorders. It deals with disturbances of mood, thought, perception, behavior, memory, impulse control, identity, sleep, and relationships. Unlike many medical specialties, psychiatry stands directly at the…

The Milgram experiment is one of the most famous and unsettling studies in the history of psychology. Conducted by Stanley Milgram at Yale University in the early 1960s, the experiment investigated obedience to authority by asking ordinary participants to administer…

Stimulus overload is the psychological and physiological state that occurs when the mind receives more sensory, social, emotional, or informational input than it can comfortably process. Human beings are constantly surrounded by stimuli: sounds, lights, smells, textures, conversations, screens, alerts,…

Attention Restoration Theory is a psychological theory that explains why certain environments, especially natural settings, help the mind recover from mental fatigue. The theory was developed by environmental psychologists Rachel Kaplan and Stephen Kaplan, whose work showed that attention is…

Lucid dreaming is the experience of becoming aware that one is dreaming while the dream is still happening. In an ordinary dream, the dreamer accepts the world of the dream as real, no matter how strange it becomes. In a…

Myers Briggs personality types are one of the most widely recognized systems for describing differences in how people think, communicate, make decisions, organize their lives, and relate to the world. The Myers-Briggs Type Indicator, often abbreviated as MBTI, classifies personality…

AI and human cognition is the study of how artificial intelligence changes the way people think, learn, remember, decide, create, communicate, and understand themselves. It is not only a technical topic about machines; it is a psychological and philosophical topic…

Social media psychology is the study of how platforms such as Facebook, Instagram, TikTok, X, YouTube, Reddit, Snapchat, Discord, and emerging digital communities shape human thought, emotion, identity, behavior, relationships, attention, self-esteem, and social life. Social media is not simply…

Digital psychology is the study of how digital technologies shape thought, emotion, identity, behavior, relationships, attention, learning, self-presentation, and mental health. It examines what happens when human minds live inside environments built from screens, algorithms, notifications, platforms, avatars, data, and…

Loneliness and isolation are often spoken of as the same condition, but psychology draws an important distinction between them. Isolation refers to the objective state of being physically or socially separated from others. A person may live alone, work remotely,…

Identity psychology is the study of how human beings develop, maintain, question, revise, and defend a sense of who they are. Identity is not simply a name, personality type, job title, nationality, or private feeling. It is the organized meaning…