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Does Thompson's Thatcher Effect reflect a face-specific mechanism?

Yetta K Wong¹, Elyssa Twedt, David Sheinberg

¹Department of Psychology, Vanderbilt University, Nashville, TN 37203, USA; yetta.wong@vanderbilt.edu

|October 15, 2010

Summary

This summary is machine-generated.

The Thatcher Effect (TE), difficulty seeing inverted parts in inverted faces, also occurs with other objects like cars and buildings. Its magnitude depends on upright object recognition, not unique face mechanisms.

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Area of Science:

Cognitive Psychology
Visual Perception
Object Recognition

Background:

The Thatcher Effect (TE) describes the difficulty in perceiving local feature inversions when a face is globally inverted.
This phenomenon has primarily been studied in the context of facial recognition.

Purpose of the Study:

To investigate the generality of the Thatcher Effect (TE) beyond faces.
To compare the magnitude of the TE across different object categories.
To determine if a unique mechanism underlies the TE for faces.

Main Methods:

The study tested the Thatcher Effect (TE) using a variety of faces and non-face objects (cars, buildings, bikes, letter strings).
The magnitude of the TE was measured for both inverted and upright stimuli.
Performance on upright stimuli was correlated with the magnitude of the TE.

Main Results:

The Thatcher Effect (TE) was observed across multiple non-face object categories, including cars, buildings, bikes, and letter strings.
The magnitude of the TE for faces was not significantly larger than for other object categories.
The strength of the TE could be predicted by performance on upright object recognition tasks, irrespective of object type.

Conclusions:

The Thatcher Effect (TE) is not unique to faces and generalizes to various object categories.
The findings suggest that the mechanisms underlying the TE are not face-specific.
Object recognition performance for upright stimuli is a key predictor of the Thatcher Effect's magnitude across categories.