Emotion perception, but not affect perception, is impaired with semantic memory loss

Area of Science:

• Cognitive Neuroscience
• Psychology
• Linguistics

Background:

• The prevailing view posits emotion perception is innate, universal, and independent of conceptual knowledge.
• Emotion concept knowledge has been considered secondary to the perception of facial affect.

Purpose of the Study:

• To investigate the role of semantic processing in discrete emotion perception.
• To challenge the "basic emotion" model by examining patients with semantic deficits.

Main Methods:

• Studied three patients with semantic dementia and significant semantic processing impairments.
• Assessed their ability to perceive facial expressions, including affect (pleasant/unpleasant) and discrete emotions.

Main Results:

• Patients spontaneously perceived pleasant and unpleasant facial expressions.
• They failed to perceive discrete emotions (e.g., anger, fear) despite intact affect perception.
• This occurred even in tasks not requiring emotion words.

Conclusions:

• Discrete emotion concept knowledge is crucial for transforming basic affect perception into recognizing specific emotions.
• Findings challenge the universality of discrete emotion perception and highlight the role of semantic knowledge.