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The table of contents revealed that there were several relevant chapters. She had seen the authors' names cited in other sources so she thought they must be experts.

Emotions in the Human Face

Part III  New Research Directions

9 Measuring facial movement with the Facial Action Coding System
by Paul Ekman and Wallace V Friesen

Background to the development of the Facial Action Coding System
Reliability of the Facial Action Coding System

10 An evolutionary perspective on human facial displays
by William K. Redican

Introduction to primate taxonomy and
Natural selection
Facial displays and their social contexts

11 Measuring the ability to recognize facial expressions of emotion
by Maureen O'Sullivan

Stage one: conceptualization
Stage two: reification
Stage three: elaboration
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