Where does highlight collide?

In computer graphics a specular highlight is the concentrated bright spot a glossy surface shows where it reflects a light source toward the viewer, the visual cue that reads a material as shiny rather than matte. Phong's 1975 Illumination for computer generated pictures modelled it with a reflection term raised to a shininess exponent, so a tighter, brighter spot signals a smoother surface. The name borrows the photographic and painterly meaning of a bright touch, but here it is a computed shading term rather than an observed tonal region. The referent is a reflectance-model bright spot on a rendered surface, not the overall bright zone of a photograph or a marked passage of text.[1]

Unit

The intensity and tightness of the mirror-direction reflection on a surface

Recovery means

Not applicable

Measured by

Computed from the angle between the viewer and the mirror direction and a surface shininess exponent

In the study-strategies literature highlighting (or underlining) is the common practice of marking portions of a text while reading in the hope of improving later recall, treated as a learning technique whose effectiveness can be tested. Dunlosky and colleagues' 2013 review rated it as low-utility: highlighting generally yields little benefit over ordinary reading and can even hurt when it draws attention away from connections across a passage. The word carries the visual meaning of making something stand out, but the construct here is a learner behaviour and its measured effect on memory. The referent is a study technique and its efficacy, not a bright region of a photograph or a reflectance model.[2]

Unit

The use of marked text passages and its effect on later retention

Recovery means

Not applicable

Measured by

Assessed by comparing recall or comprehension of highlighted versus non-highlighted study against test outcomes