Temperament: innate patterns of behavior and emotional reactivity

Core characteristics and common dimensions

Researchers describe temperament by several broad dimensions rather than a single label. Typical dimensions include:

• Activity level — general energy and movement.
• Emotional reactivity — intensity and threshold of emotional responses.
• Negative affectivity — proneness to sadness, fear, or anger.
• Extraversion/surgency — sociability, impulsivity, and positive affect.
• Effortful control — ability to focus attention and inhibit impulses.

These temperament dimensions are measured through parent reports, observer ratings, laboratory tasks, and physiological indicators (for example heart rate or startle responses). They help explain consistent patterns in behavior across situations and over time.

Development, causes and measurement

Temperament is widely considered to have a strong biological component: genetic influences, prenatal environment, and early brain development all play roles. Classic longitudinal studies of infants and children showed identifiable temperamental styles from the first months of life, and twin studies support moderate heritability for many dimensions. At the same time, temperament interacts with caregiving, culture, and experience; parenting practices and life events can amplify, buffer, or modify temperamental tendencies.

History and enduring models

The idea of inborn behavioral types has a long history. Ancient medical thinkers used the concept of Galen of Pergamon and related theories to link bodily fluids to disposition. Those early categories were called humors and described four classical temperaments. Modern psychology replaced bodily explanations with biological and behavioral research but retains the practical aim of categorizing consistent behavioral styles. Influential modern frameworks include early infant typologies (for example the "easy" and "difficult" infant patterns), trait models that overlap with personality frameworks, and dimensional accounts used in developmental psychopathology.

• Historically noted types: phlegmatic, choleric, sanguine, and melancholic — labels dating from classical and medieval medicine.

Uses, examples and distinctions

Understanding temperament is useful for parenting, education, and clinical practice because it highlights predictable strengths and vulnerabilities. A highly reactive infant may need steady soothing and predictable routines, while a child high in effortful control often succeeds in tasks requiring focus. Temperament is distinct from individual choices and from transitory mood; it is also not simply a set of learned behaviors — most researchers contrast temperament with behaviors that are primarily learned. Nevertheless, temperament and environment shape one another continuously.

Notable concepts and further reading

Key terms encountered in the literature include traits (stable descriptive tendencies), behavioral inhibition (shyness and avoidance), and effortful control. Historical and conceptual background can be explored through summaries of early thinkers and modern reviews. For historical context see accounts of Galen and classical medicine, and for developmental perspectives consult temperament research originating in mid-20th-century longitudinal studies. For a concise overview and links to further resources, see general surveys and accessible reviews in developmental and personality psychology.

For additional resources and technical summaries, follow introductory reviews and authoritative textbooks in developmental psychology and behavioral genetics; the terms above serve as useful entry points for further exploration.

psychology overview • individual differences • trait research • learning vs. innate • mood distinction • Galen • humors