constancy


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

constancy

 [kon´stan-se]
the quality of remaining stable or unaltered.
form constancy the ability to recognize forms and objects as the same in spite of variation in environment, position, and size.
object constancy the capacity to understand that an absent person or object exists and will return.

con·stan·cy

(kon'stan-sē),
The quality of being unchanging
[L. constantia, fr. consto, to stand still]

constancy

[kon′stənsē]
an absence of variation in quality of distinctive features despite location, rotation, size, or color of an object.

con·stan·cy

(kon'stăn-sē)
The quality of being constant.
[L. constantia, fr. consto, to stand still]

constancy 

Perceptual phenomenon whereby the properties of certain objects appear to remain relatively constant, despite changes in the stimulus characteristics which induced the perception. All constancies occur only within a limited range.
brightness constancy Perceptual phenomenon whereby the brightness of an object appears to remain relatively constant, despite changes in the level of its illumination. Example: white paper appears white whether it is seen in sunlight or in the weaker or yellower illumination of a light bulb. Syn. lightness constancy.
colour constancy Perceptual phenomenon whereby the colour of an object appears to remain relatively constant, despite changes in the spectral composition of the incident light.
shape constancy Perceptual phenomenon whereby the shape of an object appears to remain relatively constant, despite changes in the viewing angle. Example: A circle held obliquely to the line of sight appears more circular than it should due to shape constancy although its retinal projection is oval.
size constancy Perceptual phenomenon whereby the size of an object appears to remain relatively constant, despite changes in the viewing distance (and therefore of its retinal image size).
References in classic literature ?
Constancy in love is a good thing, but it means nothing, and is nothing, without constancy in every kind of effort.
Yes, to give your present ardour time to cool, and try the truth and constancy of your soul's love for mine.
Faithfulness and constancy mean something else besides doing what is easiest and pleasantest to ourselves.
Further, the pace and constancy of the internet access will not be affected by simultaneous user interaction.
The adhesive is stress absorbing to resist the rigors of thermal cycling and features outstanding conductive constancy to cell and ribbon metallization during damp heat exposure.
In this year's annual report the panel's observations and top concerns include budget and constancy of purpose, transparency and risk management," said ASAP chairman Joseph W.
PerfectLum Suite not only calibrates displays, but also performs acceptance and constancy tests to verify that the display conforms to such regulations as AAPM TG18, DIN 6868-57, DIN 6868-157, JESRA X-0093, IEC 62563-1 and the New York state Primary Diagnostic Monitor (PDM) Quality Assurance Program.
His remarkable constancy under suffering stand as an example to everyone.
The video is very sweet and is subtly built around the continuity of the baby's development and the constancy of the couple's love for one another and their baby.
He is not yet the finished article but he has about him an admirable constancy of purpose that is now paying dividends" - Sir Bernard Ingham, who was Lady Thatcher's press secretary.
He is not yet the finished article but he has about him an admirable constancy of purpose that is now paying dividends" Sir Bernard Ingham, who was Lady Thatcher's press secretary "You really have no knowledge of economics, so stick to being a bigot with a woodworking O-level" Former Bank of England adviser David Blanchflower attacks Tory MP Ben Gummer, who challenged Mr Blanchflower's economic predictions "Hideous, just hideous" Labour MP Tom Harris' description of the Christmas decorations in his home city of Glasgow
Constancy and the Ethics of Jane Austen's "Mansfield Park" by Joyce Kerr Tarpley (Washington, DC: Catholic University of America Press, 2010)