Developmental Prosopagnosia: A childhood case study

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There are children that demonstrate clear symptoms of prosopagnosia.

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Cambridge Face Perception Test (CFPT)

Acknowledgements

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• Special thank you to the participants and their families.

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• Thank you to Research Assistants Laura Hughes, Kelly Gregg, and Britney Luebbe.

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B: Score= 50*, 56* V: Score= 80 Control: Mean= 65.35, (N= 40; SD= 11.6)

•  NIH Grant T32 HD007151”Interdisciplinary Training Program in Cognitive Science” and NIH Grant “Visual Psychophysics in Human Face Processing”

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B: Score= 82% correct V: Score= 21% Control: Mean= 58% (N= 54; SD=15)

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Children sorted 6 faces based on similarity to a target face. Does not require memory as the target is presented with the test faces.

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Children were presented with an image of a person’s eyes and asked to identify the emotion by picking from four word choices.

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Continual work on creating better diagnostic tools and intervention programs is key.

We have observed a floor effect on this test.

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B: Score= 87% V: 50% Control: Mean= 70% (N= 30; SD=10)

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Take Home Message

B: Sum Score= 15*, 21*, 24 V: Sum Score= 16 Control: Mean= 32.6 (N= 41; SD= 12.7)

Reading the Mind in Eyes

•  Visual Motor/Fine Motor Function (Mean= 100, SD= 50) •  Purdue Pegboard: Preferred Hand= 85, Non preferred Hand= 118, Both Hands= 102 • Rey-O: Standard Copy= 88, Delayed= 77, Rotated Copy= 108, Delayed= 82

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• 7 year old adopted male. • He has some global cognitive problems. • Full scale IQ in the mid-80’s.

Children were presented with a pair of eyeglass frames and were asked to pick the frame from a series of 2-person line-ups. Created to be a parallel test to Pelicano.

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What we know about V

SD=10)

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(mean age= 7.4 years, range= 7.3-7.9 years)

Children were presented with a face and asked to select the face from a line-up of 3. Used a staircase method to determine the number of faces the child can remember.

hardest

• Behavioral/Emotional Function (Mean= 50, SD= 10) •  BASC-2, Parent Form: Externalizing Problems= 48, Internalizing Problems= 50, Behavioral Symptoms= 50, Adaptive Skills= 53 •  BASC-2, Self Report: Interpersonal Relations= 50, Emotional Symptoms= 52

• There is clearly diversity in the symptoms that these children display.

• We also successfully trained B to identify photographs of 30 familiar individuals. However, the properties that he attended to are unclear.

Identical (easy) test

• Attention/Executive Function • TOVA, Visual: Omissions=108, Commissions= 107, Response Time= 108, Variability= 104 (Mean= 100, SD= 15) •  BRIEF, Parent Form: Composite= 44 (Mean= 50,

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94 typically developing 7-year-olds

Working Memory (WM)

Frames to learn

• Language (Mean= 100, SD= 15) •  PPVT-4: Standard= 148 •  CASL: Composite= 125 •  WJ-III-NU: Standard= 134

•  Children can suffer from DP.

• The social difficulties children with DP present with can look similar to those of children with Autism Spectrum Disorders. Research is currently looking at these overlapping symptoms and how to best differentiate between the diagnoses.

B: Score= -.24 V: Score= .76 Control: Mean= 0.39 (N= 41; SD= 0.415)

Object Recognition Test

• Intelligence (Mean= 100, SD= 15) •  WISC-IV: Composite=120 •  Stanford Binet- 5th Edition: Full Scale= 136

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Two 7-year-old males presenting with typical symptoms of developmental prosopagnosia • B was given a full neurological work-up. Some tests completed when he was 6 years old. These results are marked by asterisk (*). • V was given a series of face processing tests.

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Participants

B: 50%*, 48.33%*, 46.7% correct V: 50% Control: Mean= 74.2% (N= 55; SD= 10.5)

Discussion

• B showed pure indications of DP, while V showed symptoms of DP along with indicators of other problems.

Children sorted 8 female face from least to most attractive.

Children were presented with a face from several angles and asked to pick the face from a series of 2-person line-ups

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Evaluate B and V’s performance on a battery tests as compared to their typically developing age mates.

Attractiveness

faces to learn

• General Functioning- above average or within typical range on all tests.

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Visual Perceptual/Memory Function

Goals

Investigate the possible presence of DP in two children, henceforth referred to as B and V, whose parents report that they have extreme difficulty recognizing faces.

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Cambridge Face Memory Test (adapted by Pelicano for children)

What we know about B

•  Developmental prosopagnosia refers to an inability to recognize faces without any known neurological impairment. •  In recent years, much has been learned about the characteristics of DP in adults. •  However, very little is known about whether and how the condition presents in children. 

• 

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University of Minnesota1 and Harvard University2 

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Jordan Mathison1, Sherryse Corrow1, Michelle Pla71, Kelly King1, Richard Ziegler1,   Garga Cha7erjee2, Ken Nakayam2a, Albert Yonas1 

Introduction

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Developmental Prosopagnosia: A Childhood Case Study