A temperament test is a structured assessment designed to measure the biologically-grounded, relatively stable individual differences in emotional reactivity, activity level, and behavioural style that emerge early in life and persist across situations. Unlike personality tests, which map learned patterns, values, and self-concept that accumulate through experience, temperament tests focus on the constitutional substrate — the dispositional tendencies that are present before significant environmental shaping has occurred. This guide covers what temperament tests actually measure, the major frameworks they're based on, how they differ from personality assessments, and what the results mean for understanding yourself or a child.
What Temperament Tests Measure
Temperament tests are designed to capture dimensions of emotional and behavioural style that are:
- Early-appearing — visible in infants and very young children before extensive socialisation
- Relatively stable — consistent across situations and moderately stable over time
- Biologically based — showing meaningful heritability in twin studies, with neurobiological correlates
- Situationally expressed — not just stable traits but characteristic ways of responding to stimulation, novelty, social demands, and frustration
The most widely studied dimensions across different temperament frameworks include: negative emotionality (how easily and intensely distress is triggered), surgency/extraversion (approach motivation and positive affect), effortful control (capacity for attention regulation and inhibitory control), and — in some frameworks — sensory sensitivity, sociability, and soothability.
The Major Temperament Frameworks
Several research traditions have produced distinct temperament frameworks, each with associated assessment instruments:
Thomas and Chess: Nine Dimensions
The foundational framework from the New York Longitudinal Study identified nine infant temperament dimensions: activity level, rhythmicity (regularity), approach-withdrawal, adaptability, threshold of responsiveness, intensity of reaction, quality of mood, distractibility, and persistence/attention span. These produced three commonly referenced infant profiles: "easy," "difficult," and "slow-to-warm-up." The Infant Temperament Questionnaire and its successors operationalise this framework.
Kagan: Behavioural Inhibition
Jerome Kagan's research at Harvard focused specifically on behavioural inhibition — the tendency to withdraw from novel people, objects, and situations. High behavioural inhibition in infancy is one of the most stable temperament traits studied and predicts social anxiety risk in adolescence and adulthood. His work used both parent-report and lab observation (measuring physiological markers of inhibition alongside behaviour).
Rothbart: Three Core Dimensions
Mary Rothbart's framework — arguably the most influential contemporary temperament model — organises temperament around three broad dimensions: Negative Emotionality (distress and fear reactivity), Surgency/Extraversion (approach motivation, activity, positive affect), and Effortful Control (attentional regulation, inhibitory control). The Children's Behavior Questionnaire (CBQ) and the Adult Temperament Questionnaire (ATQ) operationalise this model.
EAS: Emotionality, Activity, Sociability
Arnold Buss and Robert Plomin's EAS model focuses on three dimensions — emotionality, activity level, and sociability — which they selected specifically based on heritability evidence. The EAS Temperament Survey is one of the more widely used research instruments.
How Temperament Tests Differ from Personality Tests
The most important distinction: temperament tests are designed to measure the biological substrate of personality, not its full expression. They're more focused on automatic emotional and behavioural tendencies than on the learned patterns, values, goals, and self-narratives that personality assessments also capture.
In practice:
- Temperament assessments tend to be briefer and more behaviourally focused
- They're often designed for use with children or with parent/caregiver report for young children
- They focus on reactivity and regulation rather than on traits like Agreeableness or Openness that require extensive social learning to express
- The Big Five personality model overlaps substantially with temperament on Neuroticism and Extraversion but also captures dimensions that have more environmental shaping
An analogy: temperament is the hardware; personality is the software that runs on that hardware given the particular environments and experiences encountered.
What Temperament Test Results Mean
Temperament assessment results are most usefully understood as descriptions of baseline tendencies — not predictions of outcomes, and not fixed destinies. High negative emotionality in a child describes a more sensitive, more easily distressed nervous system; it doesn't predict anxiety disorder. The interaction between the temperament and the environment — what Thomas and Chess called person-environment fit — determines outcomes more than either alone.
For adults, temperament assessment can clarify which aspects of your character feel most deeply wired (and therefore are most efficiently worked with rather than against) and which aspects have more environmental give. The person with high negative emotionality who has developed strong effortful control through practice operates very differently from one who hasn't — the temperament substrate is similar; the personality expression diverges.
Most clinical and research temperament assessments are not consumer-accessible. The Big Five personality framework, which captures the major temperament dimensions as part of a broader trait map, is a useful substitute for adults. A free Big Five personality test will give you a well-validated profile that includes the core temperament-adjacent dimensions (Neuroticism, Extraversion) along with the learned dimensions (Conscientiousness, Agreeableness, Openness).
Frequently Asked Questions
At what age can you reliably assess temperament?
Parent-report temperament measures have been validated from early infancy (4–6 months). Lab-based behavioural measures can capture temperament-relevant behaviours from birth. Some dimensions (particularly behavioural inhibition and negative emotionality) show remarkable stability from the first year of life, while others stabilise later in development.
Is temperament genetic or environmental?
Both. Twin studies consistently show heritability estimates of 40–60% for major temperament dimensions, meaning roughly half the variance is genetic and half is environmental. The genetic component is expressed through neurobiological systems (stress reactivity, dopamine signalling, limbic threshold) that are present from birth. Environmental factors — particularly early caregiving quality and the overall fit between the child's temperament and their social environment — shape how the temperament is expressed.
Can adults change their temperament?
The biological baseline is relatively stable, particularly at the extremes. What changes is expression and regulation. A person with high emotional reactivity can develop substantial effortful control through sustained practice, which changes how the reactivity manifests in behaviour even if the underlying sensitivity remains. This is the practical meaning of most character development work.
What is the difference between a temperament test and a personality disorder screening?
Completely different purposes and frameworks. Personality disorder screening looks for specific patterns of thinking, feeling, and relating that cause significant impairment and are relatively inflexible across contexts — a clinical assessment. Temperament testing maps normal variation in dispositional tendencies. High scores on any temperament dimension are not pathological; they describe characteristics of how the nervous system operates.
Are temperament tests accurate?
Research-validated temperament instruments (CBQ, ATQ, EAS, various infant scales) have acceptable reliability and validity within their intended populations and frameworks. Parent-report measures are subject to the usual biases of self-report, and different raters of the same child often disagree. Lab-based behavioural observation is more objective but also more context-specific. No temperament measure should be treated as a precise measurement of a stable fixed quantity.