Glossary category
Assessment Foundations
The core ideas behind measuring personality, from psychological constructs to traits and self-report inventories.
Personality Dimension
A personality dimension is a continuous scale used to represent differences in a trait or behavioral tendency. Instead of sorting people into an all-or-nothing category, a dimension allows low, moderate, and high positions with many values in between. Most modern personality scoring models use dimensions even when results are later summarized with labels or archetypes.
Personality Trait
A personality trait is a relatively enduring tendency to think, feel, or behave in certain ways across time and situations. Traits are usually measured as dimensions, meaning people can fall anywhere along a continuum rather than belonging to a single fixed box. A trait score describes a tendency, not what someone will do in every circumstance.
Psychological Construct
A psychological construct is a theoretical concept used to describe a pattern that cannot be observed directly, such as extraversion, anxiety, intelligence, or motivation. Researchers define the construct, connect it to observable responses or behavior, and test whether those measurements behave as theory predicts. Constructs are models for organizing evidence, not physical objects.
Psychometric Test
A psychometric test is a structured assessment designed to measure a psychological characteristic using standardized questions, tasks, scoring, and interpretation. Common examples include cognitive-ability tests, aptitude tests, and personality inventories. A test's value depends on evidence for reliability, validity, fairness, and fit with its intended use.
Psychometrics
Psychometrics is the science of measuring psychological characteristics that cannot be observed directly, such as personality traits, abilities, and attitudes. It covers how assessments are designed, scored, and evaluated, especially whether scores are consistent and whether evidence supports the interpretation made from them.
Self-Report Inventory
A self-report inventory is a questionnaire in which people describe their own traits, feelings, behaviors, or experiences. Personality inventories commonly ask respondents to rate statements or choose between alternatives, then combine those responses into trait scores. They are efficient and informative, but results can be affected by self-knowledge, wording, context, and response bias.