Body Image at the Trunk: An Investigation into Externally Referenced Width Perception and Picture Mapping

Overview

Journal Perception

Specialties Psychiatry
Psychology

Date 2024 Aug 2

PMID 39091103

Authors

Simon Pratt

Benedict M Wand

Dana A Hince

Mervyn J Travers

Lee Schneider

Sara Kelly

William Gibson

Affiliations

Soon will be listed here.

Abstract

Body image is a conscious representation of the body, encompassing how our body feels to us. Body image can be measured in a variety of ways, including metric and depictive measures. This study sought to assess body image at the trunk by investigating, and comparing, a metric and depictive measure. Sixty-nine healthy participants estimated their thorax, waist, and hip width by externally referencing mechanical calipers. Participants were also asked to select the true image of their trunk from a random display of nine images containing the true image and incrementally shrunken or enlarged images. Participants demonstrated evidence of thorax and waist width overestimation in the width perception task, with no evidence for hip misestimation. For the picture mapping task, the majority of participants were inaccurate. In participants who were inaccurate, approximately equal proportions underestimated and overestimated their trunk width. The two tasks were found to be independent of each other. Distortions, or inaccuracies, were apparent in a metric measure, and inaccuracies also present in a depictive measure, of body image at the trunk for healthy participants. An overestimation bias was apparent in the metric, but not depictive, task. No relationship was found between tasks..

References

DAmour S, Harris L . The perceived size of the implicit representation of the dorsum and palm of the hand. PLoS One. 2020; 15(3):e0230624. PMC: 7089569. DOI: 10.1371/journal.pone.0230624. View

Lotze M, Moseley G . Role of distorted body image in pain. Curr Rheumatol Rep. 2008; 9(6):488-96. DOI: 10.1007/s11926-007-0079-x. View

Longo M, Azanon E, Haggard P . More than skin deep: body representation beyond primary somatosensory cortex. Neuropsychologia. 2009; 48(3):655-68. DOI: 10.1016/j.neuropsychologia.2009.08.022. View

Dolan B, Birtchnell S, Lacey J . Body image distortion in non-eating disordered women and men. J Psychosom Res. 1987; 31(4):513-20. DOI: 10.1016/0022-3999(87)90009-2. View

Slade P, Russell G . Awareness of body dimensions in anorexia nervosa: cross-sectional and longitudinal studies. Psychol Med. 1973; 3(2):188-99. DOI: 10.1017/s0033291700048510. View

Tagini S, Scarpina F, Zampini M . Body size estimation in obesity: a systematic review and meta-analysis. Exp Brain Res. 2021; 239(12):3417-3429. DOI: 10.1007/s00221-021-06215-4. View

Wand B, James M, Abbaszadeh S, George P, Formby P, Smith A . Assessing self-perception in patients with chronic low back pain: development of a back-specific body-perception questionnaire. J Back Musculoskelet Rehabil. 2014; 27(4):463-73. DOI: 10.3233/BMR-140467. View

Longo M, Haggard P . Implicit body representations and the conscious body image. Acta Psychol (Amst). 2012; 141(2):164-8. DOI: 10.1016/j.actpsy.2012.07.015. View

Sadibolova R, Ferre E, Linkenauger S, Longo M . Distortions of perceived volume and length of body parts. Cortex. 2018; 111:74-86. DOI: 10.1016/j.cortex.2018.10.016. View

10.

de Vignemont F . Body schema and body image--pros and cons. Neuropsychologia. 2009; 48(3):669-80. DOI: 10.1016/j.neuropsychologia.2009.09.022. View

11.

Freeman R, Thomas C, SOLYOM L, Hunter M . A modified video camera for measuring body image distortion: technical description and reliability. Psychol Med. 1984; 14(2):411-6. DOI: 10.1017/s0033291700003652. View

12.

Longo M, Haggard P . An implicit body representation underlying human position sense. Proc Natl Acad Sci U S A. 2010; 107(26):11727-32. PMC: 2900654. DOI: 10.1073/pnas.1003483107. View

13.

Koo T, Li M . A Guideline of Selecting and Reporting Intraclass Correlation Coefficients for Reliability Research. J Chiropr Med. 2016; 15(2):155-63. PMC: 4913118. DOI: 10.1016/j.jcm.2016.02.012. View

14.

Ben-Tovim D, Whitehead J, Crisp A . A controlled study of the perception of body width in anorexia nervosa. J Psychosom Res. 1979; 23(4):267-72. DOI: 10.1016/0022-3999(79)90029-1. View

15.

de Vet H, Terwee C, Knol D, Bouter L . When to use agreement versus reliability measures. J Clin Epidemiol. 2006; 59(10):1033-9. DOI: 10.1016/j.jclinepi.2005.10.015. View

16.

Peltz E, Seifert F, Lanz S, Muller R, Maihofner C . Impaired hand size estimation in CRPS. J Pain. 2011; 12(10):1095-101. DOI: 10.1016/j.jpain.2011.05.001. View

17.

Linkenauger S, Wong H, Geuss M, Stefanucci J, McCulloch K, Bulthoff H . The perceptual homunculus: the perception of the relative proportions of the human body. J Exp Psychol Gen. 2014; 144(1):103-13. DOI: 10.1037/xge0000028. View

18.

Tovee M, Benson P, Emery J, Mason S, Cohen-Tovee E . Measurement of body size and shape perception in eating-disordered and control observers using body-shape software. Br J Psychol. 2003; 94(Pt 4):501-16. DOI: 10.1348/000712603322503060. View

19.

Wand B, Elliott R, Sawyer A, Spence R, Beales D, OSullivan P . Disrupted body-image and pregnancy-related lumbopelvic pain. A preliminary investigation. Musculoskelet Sci Pract. 2017; 30:49-55. DOI: 10.1016/j.msksp.2017.05.003. View

20.

Gilpin H, Moseley G, Stanton T, Newport R . Evidence for distorted mental representation of the hand in osteoarthritis. Rheumatology (Oxford). 2014; 54(4):678-82. PMC: 4372676. DOI: 10.1093/rheumatology/keu367. View