Manic-depresive personality
    Marasmus
    Marathon therapy
    Marijuana
    Marital adjustment
    Marital interaction styles
    Marriage counseling
    Marriage counseling in groups
    Masculine protest
    Masturbation
    Maternal deprivation
    Mathematical learning theory
    Mechanisms of group psychotherapy
    Mechanistic theory
    Medical model of psychotherapy
    Medieval thinking
    Memory
    Memory disorders
    Memory experiments
    Memory retrieval processes
    Mental health programs
    Mental health teams
    Mental illness
    — attitudes toward
    — early history
    Mental imagery
    Mental measurement yearbooks
    Mental retardation
    Merrill-Palmer Scales
    Metaanalysis
    Metapsychology
    Michigan picture test
    Microdiagnosis
    Microtraining
    Middle age
    Middle childhood
    Military psychology
    Miller analogies test
    Millon behavioral health inventory
    Millon clinical multiaxial inventory
    Mill's canons
    Mind—body problem
    Mindlessness — mindfulness
    Mindlessness—mindfulness
    Minimal brain dysfunction (diagnosis)
    Minnesota Multiphasic Personality Inventory
    Mixed standard scale
    Mnemonic Systems
    Mnemonics
    Mob psychology
    Models
    Moderated multiple regression
    Molar—molecular constructs
    Monism / dualism
    Montessory method
    Mooney problem checklist
    Moral development
    Morale in organizations
    Morita therapy
    Motivation
    Movement therapy
    Multicultural counseling
    Multidimensional Scaling
    Multimodal therapy
    Multiple correlation
    Multiple family therapy
    Multiple Personality
    Multiple regression
    Multiple sclerosis
    Multivariate analysis methods
    Munchausen syndrome by proxy
    Muscle relaxation
    Music therapy
    Myth of mental illness
    Myths
    
   N
    
    Naikan therapy
    Narcissistic personality