What's the difference between constancy and trueness?

Constancy

Definition:

(n.) The state or quality of being constant or steadfast; freedom from change; stability; fixedness; immutability; as, the constancy of God in his nature and attributes.
(n.) Fixedness or firmness of mind; persevering resolution; especially, firmness of mind under sufferings, steadiness in attachments, or perseverance in enterprise; stability; fidelity.

Example Sentences:

(1) The author differentiates between two modes of perception, one is the "expressive" mode, stabilizing and aiming at constancy, the other is the "impressive" mode, penetrating the self and aiming at identification with the percept.
(2) While numerous studies on infant perception have demonstrated the infant's ability to discriminate sounds having different frequencies, little research has evaluated more sophisticated pitch perception abilities such as perceptual constancy and perception of the missing fundamental.
(3) The conference heard that Stewart Hosie, the SNP’s Treasury spokesman at Westminster, had been elected as deputy leader after seeing off challenges from Holyrood ministers Keith Brown and Angela Constance.
(4) A digital constancy meter which has been used in our institution uses a plane-parallel chamber for daily morning output checks of treatment machines.
(5) The constancy of the lifetime-normalized phosphorescence yield with apoazurin and with Trp-314 in alcohol dehydrogenase establishes that the intersystem crossing quantum yield is practically unaffected across the temperature range.
(6) The results indicated that for most of the variables studied the reproducibility of measurements was better within the test session (reliability) than between the different test days (constancy).
(7) Marked and prolonged disturbances were revealed in the deposition of the endogenous serotonin characterized by definite regularities in all the tissues under study, connected with the changes of the relative constancy of the enteral medium due to the absence of pancreatic secretion in the lumen of the digestive tube.
(8) The simplest models make a variety of unrealistic assumptions and an outline is presented of how the assumptions of fingerprint band population frequency equality and mutation rate constancy can be relaxed to produce a more realistic and powerful model.
(9) The constancy of the wavelength-dependence of light-scattering and ultrastructural criteria indicate that microtubules of normal morphology are formed in both phases of the assembly process.
(10) It was concluded that the attention was involved both in figure-ground segregation and in maintaining object constancy.
(11) GLA (10(-7)M), attenuated significantly the spontaneous decrement of contractile constancy exhibited by control preparations during a period of 180 min of activity in isolation, whereas BPB (10(5) M) resulted in an augmented and faster decrement of inotropic constancy.
(12) 4) The constancy of the sum of nucleotides as long as glucose is present is postulated to be due to resynthesis via adenosine kinase which competes successfully with adenosine deaminase.
(13) Brightness constancy occurred for high-contrast stimuli and under sustained viewing conditions.
(14) In two studies using push up and prism vergence exercises the conflict is shown to result from differences in the constancy of effort.
(15) The same is true for the water content: constancy without significant decrease during the investigated life periods and without sex dependent differences.
(16) The variables examined were frequency, longevity, and constancy of intergenerational contact, problem discovery and problem resolution procedures, physical environment, and activity structure.
(17) A new procedure for detecting departures from constancy of the parameters of a probabilistic model over a period of time is proposed.
(18) Knowledge of the salt dependences of ka and of the observed equilibrium constance Kobs of the ligand-nucleic acid interaction should usually be sufficient to determine whether a screening controlled mechanism or a pre-equilibrium mechanism is suitable to describe the process.
(19) Using pairs of cinematograms, direction discrimination of global motion was measured under various conditions of direction distribution bandwidth, exposure duration, and constancy of each dot's path.
(20) To assess the local glomerular actions of LTD4 independently of these systemic effects, glomerular microcirculatory dynamics were assessed during LTD4 infusion while constancy of renal perfusion pressure and plasma volume were maintained by partial aortic constriction and isoncotic plasma infusion, respectively.