Where does strength collide?

The load a material can carry before it yields or breaks, reported as the stress (force per unit area) reached at that point. Galileo's 1638 Discourses and Mathematical Demonstrations Relating to Two New Sciences gave the first quantitative treatment of the breaking load of beams and columns, asking how a body's dimensions set the force it can bear. Griffith's 1921 The Phenomena of Rupture and Flow in Solids later tied that breaking point to the growth of cracks, founding the modern account of why real materials fail below their ideal strength. The referent is a mechanical property of a solid measured to failure, not the magnitude of a force field, the closeness of a social relationship, or a trait of a person.[1][2]

Unit

The stress at yield or fracture, in pascals or megapascals

Recovery means

Not applicable

Measured by

Determined by loading a specimen in tension, compression, or bending until it yields or breaks and reading the stress reached

The magnitude of a field at a point in space, that is, how strongly an electric, magnetic, or other field would act on a test object placed there. Faraday's 1852 On the Physical Character of the Lines of Magnetic Force treated the field as a real, spatially varying intensity carried by lines of force rather than action at a distance. Maxwell's 1865 A Dynamical Theory of the Electromagnetic Field made that intensity a precise mathematical quantity governed by field equations. The referent is a value assigned to every point of space describing a force field's strength there, not the load a solid can bear, the closeness of a relationship, or a character trait.[3][4]

Unit

A field's magnitude at a point, in volts per metre for an electric field or amperes per metre for a magnetic field

Recovery means

Not applicable

Measured by

Inferred from the force on a known test charge or probe, or read directly with a calibrated field meter

How strong the bond is between two people in a social network, combining how much time they spend together, how emotionally close they feel, how intimate they are, and how much they help each other. Granovetter's 1973 The Strength of Weak Ties introduced the idea as a graded property of relationships and argued that weaker ties, being bridges to other groups, often carry the most novel information. The referent is a property of a link between two people in a network, not the breaking load of a material, the magnitude of a physical field, or a trait of one person.[5]

Unit

A rating of a relationship's closeness, from weak acquaintance to strong bond

Recovery means

Not applicable

Measured by

Estimated from how often two people interact, how close they report feeling, and the range of things they share

A positive personal quality, such as curiosity, fairness, kindness, or perseverance, held to be a stable and valued part of a person's character. Peterson and Seligman's 2004 Character Strengths and Virtues: A Handbook and Classification proposed a set of twenty-four such strengths grouped under six broad virtues, offering a common vocabulary and a survey for measuring them. The referent is a trait of an individual person, rated by how strongly they show it, not the load a material can bear, the magnitude of a physical field, or the closeness of a relationship.[6]

Unit

A person's standing on a named strength, scored from a self-report scale

Recovery means

Not applicable

Measured by

Assessed with self-report instruments such as the Values in Action Inventory of Strengths