Akademik

The magnitude or degree by which one quality or quantity differs from another of the same kind.

- alveolar-arterial oxygen d. the d. or gradient between the partial pressure of oxygen in the alveolar spaces and the arterial blood : P_(A–a)0₂. Normally in young adults this value is less than 20 mm Hg. SEE ALSO: alveolar gas equation.

- arteriovenous carbon dioxide d. the d. in carbon dioxide content (in mL per 100 mL blood) between arterial and venous blood.

- arteriovenous oxygen d. the d. in the oxygen content (in mL per 100 mL blood) between arterial and venous blood.

- AV d. abbreviation for arteriovenous d. of concentration of a substance.

- cation-anion d. SYN: anion gap.

- individual differences in clinical psychology, deviations of individuals from the group average or from each other.

- light d. 1. the d. in light sensitivity of the two eyes; 2. SYN: brightness d. threshold.

- masking level d. a technique of comparing threshold responses with masking noise presented in phase and out of phase with the test signal; release from masking is normal and indicates an intact brainstem auditory pathway.

- standard error of d. a statistical index of the probability that a d. between two sample means is greater than zero.