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Seven points as an estimate of the smallest subjectively experienced decrease in body satisfaction on a one-item

Stephen C Want1, Lilach Dahoah Halevi1, Zahra Vahedi1

  • 1Department of Psychology, Toronto Metropolitan University, Canada.

Body Image
|September 11, 2024
PubMed
Summary

A seven-point change on the Visual Analogue Scale (VAS) helps distinguish body satisfaction changes. This finding provides a clearer metric for understanding media

Keywords:
Effect sizeMedia effectsPersons as effect sizesSmallest subjectively experienced differenceState body satisfactionVisual Analogue Scale (VAS)

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Area of Science:

  • Psychological Measurement
  • Body Image Research
  • Media Psychology

Background:

  • Visual Analogue Scales (VASs) are widely used for measuring state body satisfaction.
  • Current VAS metrics lack easily interpretable effect sizes, leading to overestimation of practical significance.
  • There is a need for a standardized metric to quantify subjective changes in body satisfaction.

Purpose of the Study:

  • To estimate the smallest subjectively experienced difference on a one-item body satisfaction VAS.
  • To establish a practical effect size metric for interpreting changes in body satisfaction.
  • To aid researchers in analyzing and communicating the impact of media influences on body satisfaction.

Main Methods:

  • Administered a one-item body satisfaction Visual Analogue Scale (VAS) to participants.
  • Calculated the smallest subjectively experienced difference by analyzing changes between two timepoints.
  • Compared participants who reported no change versus those reporting a decrease in body satisfaction.

Main Results:

  • A seven-point change on the 101-point VAS served as a reliable cut-off.
  • This seven-point difference effectively distinguished between participants experiencing no change and those experiencing a decrease in body satisfaction.
  • The smallest subjectively experienced difference provides an interpretable effect size metric.

Conclusions:

  • The smallest subjectively experienced difference, demonstrated by a seven-point change on the VAS, offers a valuable metric for body satisfaction research.
  • This metric facilitates clearer interpretation and comparison of effect sizes, particularly concerning media influences.
  • Implementing this metric can enhance the exploration and communication of short-term effects on state body satisfaction.