Don't Get Burned by Bad Mapping
http://www.cooper.com/newsletters/2002_05/dont_get_burned_by_bad_mapping.htm

Greenwood, Wayne
Cooper Interaction Design
2002

Abstract:

The term mapping describes the relationship between a control, the thing it affects, and the intended result. Poor mapping is evident when a control does not relate visually or symbolically with the object it affects, requiring the user to stop and think, 'what's going to happen when I turn this knob?'