APA Dictionary of Psychology

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L-alpha-acetyl-methadol

la belle indifférence

labeled-line theory of taste coding

labeling theory

Labor Management Relations Act

labor relations

laboratory research

laboratory-method model

labyrinthine sense

lacrimal gland (lachrymal gland)

lacrimal reflex

lactate dehydrogenase (LDH)

lactogenic hormone

lactotropic hormone

lacunar amnesia

Ladd-Franklin theory

lagophthalmos (lagophthalmus)

laissez-faire leader

lambda model (λ model)

Lambert’s law

laminar organization

Land theory of color vision

Landau–Kleffner syndrome

Landolt circles

landscaped office

Langdon Down’s disease

Langerhans cells

language acquisition

language acquisition device (LAD)

language acquisition support system (LASS)

language center

language contact

language deficit

language development

language disability

language disorder

language learning disability (LLD)

language localization

language loyalty

language maintenance

language pathology

language planning

language retardation

language socialization

language therapy

language transfer

language universal

language-experience approach

language-origin theory

Lanterman Developmental Disabilities Act

large-sample method

laryngeal framework surgery

laryngeal neoplasm

laryngeal paralysis

laryngeal reflex

Lasthénie de Ferjol syndrome

latchkey children

late bilingualism

late luteal phase dysphoric disorder

late paraphrenia

late-onset schizophrenia

late-selection theory

latent addition period

latent class analysis (LCA)

latent construct

latent homosexuality

latent inhibition

latent learning

latent structure analysis

latent trait theory

latent variable

later life adjustment

lateral cervical nucleus

lateral confusion

lateral corticospinal tract

lateral difference

lateral dominance

lateral fissure

lateral geniculate nucleus (LGN)

lateral hypothalamic syndrome

lateral hypothalamus (LH)

lateral inhibition

lateral lemniscus

lateral olfactory tract

lateral posterior nucleus

lateral preoptic area (lPOA)

lateral social comparison

lateral specialization

lateral spinothalamic tract

lateral thalamic nucleus

lateral thinking

lateral ventricle

lateral-line system

lateralized readiness potential (LRP)

lateroventral nucleus

latitude of acceptance

latitude of noncommitment

latitude of rejection

Launois–le Cleret syndrome

Laurence–Moon–Bardet–Biedl syndrome

law of advantage

law of assimilation

law of combination

law of common fate

law of common region

law of constancy

law of contiguity

law of continuity

law of contrast

law of equality

law of equipotentiality

law of exercise

law of filial regression

law of forward conduction

law of frequency

law of good continuation

law of good figure

law of good shape

law of inclusiveness

law of initial values

law of large numbers

law of least action

law of mass action

law of neurobiotaxis

law of parsimony

law of Prägnanz

law of precision

law of prior entry

law of proximity

law of similarity

law of specific nerve energies

law of sufficient reason

law of symmetry

law-and-order orientation

laws of grouping

laws of learning

laws of thought

laxative addiction

layperson personality theories

lead-pipe rigidity

leader categorization theory

leader prototype

leader–member exchange theory (LMX theory)

leaderless group discussion

leaderless group therapy

leadership emergence

leadership labyrinth

leadership role

leadership style

leadership substitute

leadership theories

learned helplessness

learned optimism

learned response

learned taste aversion

learned treatise exception

Learning Abilities Measurement Program (LAMP)

learning by doing

learning center

learning difficulties

learning disabilities specialist

learning disability (LD)

learning disorder (LD)

learning paradigm

Learning Potential Assessment Device (LPAD)

learning skills

learning strategy

learning support center

learning technologies

learning theory

learning to learn

learning without awareness

least effort principle

least perceptible duration

Least Preferred Coworker Scale (LPC Scale)

least restrictive alternative

least restrictive environment (LRE)

least significant difference (LSD)

least squares criterion

least squares regression

leaving the field

Leber’s disease

Leboyer technique

Lee–Boot effect

left hemisphere

left-handedness

left-hemisphere consciousness

legal blindness

legal psychiatry

legal psychology

legal testimony

legitimate authority

legitimate power

leisure lifestyle

Lejeune syndrome

lemniscal system

length of stay (LOS)

lenticular nucleus

Leonardo’s paradox

lesbian feminism

lesbian separatism

Lesch–Nyhan syndrome

Lesch’s alcoholism typology (LAT)

less-is-more hypothesis

lethal catatonia

lethal dose (LD)

lethality scale

letter cancellation test

letter-by-letter reading

Letter–Number Sequencing

leuco- (leuc-; leuko-; leuk-)

leukocyte (leucocyte)

leukotomy (leucotomy)

Level I–Level II theory

level of analysis

level of measurement

level of significance

level-of-aspiration theory

levels of consciousness

levels of intelligence

levels-of-processing model of memory

Levene test for equality of variance

Levinson’s adult development theory

levodopa (L-dopa)

levomepromazine

Lewy body dementia

lexical agraphia

lexical ambiguity

lexical decision

lexical hypothesis

lexical-selection rules

lexical–gustatory synesthesia

liberation psychology

libidinal development

libidinal stage

libidinal transference

libidinal types

libido-binding activity

licensed practical nurse (LPN)

licking behavior

Liebmann effect

Life Events Rating Scale

life expectancy

life satisfaction

life-change unit (LCU)

life-history method

life-space interview

lifespan contextualism

lifespan developmental psychology

lifespan epidemiological personality approach

lifespan perspective

lifestyle modification

Lifetime of Experiences Questionnaire (LEQ)

lifetime personality

ligand-gated ion channel

light adaptation

light induction

light sensitivity

light–dark cycle

lightness constancy

lightness contrast

lightning calculator

likelihood function

likelihood principle

likelihood ratio (LR)

Lilliputian hallucination

limb kinetic apraxia

limbic epilepsy

limited competency

limited guardianship

limited responsibility

limited-capacity system

line management

line of fixation

linear causation

linear correlation

linear perspective

linear regression

linear relationship

linear transformation

lingering trajectory

lingual frenulum

lingual papilla

linguistic approach

linguistic awareness

linguistic determinism

linguistic intergroup bias

linguistic minority

linguistic relativity

linguistic typology

linguistic universal

linguistic–kinesic method

lipid-metabolism disorders

lipostatic hypothesis

lipotrophic diabetes mellitus

Lipps illusion theory

liquidation of attachment

lisdexamfetamine

listening attitude

listening strategy

listwise deletion

literal paraphasia

literal replication

litigious paranoia

Lloyd Morgan’s canon

local circuit neuron

local enhancement

local excitatory state (LES)

local independence

local potential

local regression (loess; lowess)

local–global distinction

localization of function

localized amnesia

location constancy

location-invariant neuron

lock-and-key theory

Locke’s theory of goal setting

locked-in syndrome

Lockhart v. McCree

locomotor arrest

locomotor ataxia

locus ceruleus (locus coeruleus; locus caeruleus)

locus of causality

locus of control

locus of stability

locutionary act

log-likelihood ratio (LLR)

log-linear analysis

log-normal distribution

logarithm (log)

logarithmic transformation

logical inference

logical necessity

logical paradox

logical positivism

logical thinking

logical-mathematical intelligence

logicogrammatical disorder

logistic function

logistic regression (LR)

logistic transformation

Lokian personality

London syndrome

long-delay conditioning

long-term care facility

long-term depression (LTD)

long-term memory (LTM)

long-term potentiation (LTP)

long-term therapy

long-wavelength pigment

longitudinal data

longitudinal design

longitudinal fissure

longitudinal stability

looking-glass self

loosening of associations

Lord’s paradox

Lorenzini ampullae

loss of consciousness (LOC)

lost letter procedure

lot acceptance sampling

Lou Gehrig’s disease

loudness summation

Louis-Bar syndrome

love withdrawal

low birth weight (LBW)

low blood pressure

low-ball technique

low-functioning autism (LFA)

low-pass filter

low-technology assistive device

lower motor neuron

lower real limit

lumbar puncture

lumbosacral plexus

luminosity coefficient

luminosity curve

luminous intensity

lupus erythematosus (LE)

Luria–Nebraska Neuropsychological Battery (LNNB)

lurking variable

luteinizing hormone (LH)

luteotropic hormone

lysergic acid diethylamide

lysine vasopressin (LVP)

lysinuric protein intolerance

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