Both Uses

bias
in
1776, by McCullough
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His Loyalist bias notwithstanding, Thompson's portrayal was largely the truth.†
p. 32.6 *

bias = a personal preference; or any tendency to move in a particular direction
He knew how essential it was to the future effectiveness of the army to break down regional dif ferences and biases among the troops.†
p. 41.1

Definitions:

(1) (bias)
a tendency to favor one side -- in people, a prejudice that affects fair judgment; more generally, any built-in lean to move or behave in a particular way (like a car that pulls right)
(2) (meaning too rare to warrant focus)
Specialized meanings of bias include:
- statistics: any of several errors that distort results
- textiles: a line or fold that is diagonal relative to the sides or grain of the fabric
- electronics: a steady-state current that is forced through an electronic device