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[Tripartite Influence Scale (TIS) applied to university students: validation study and application].

Wanderson Roberto da Silva1, João Marôco2, Juliana Alvares Duarte Bonini Campos1

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Summary

The refined Tripartite Influence Scale (TIS) demonstrates valid and reliable measurement of social influences on body image among university students. Women reported greater media and peer influence than men.

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Area of Science:

  • Psychology
  • Sociology
  • Public Health

Background:

  • The Tripartite Influence Scale (TIS) measures social and family influences on body image.
  • Evidence for the TIS construct's validity is limited.
  • Understanding these influences is crucial for body image research and interventions.

Purpose of the Study:

  • To evaluate the psychometric properties of the TIS in a university student population.
  • To determine the extent of media, parent, and peer influence on body image.
  • To explore how various characteristics relate to these influences.

Main Methods:

  • Confirmatory factor analysis was used to assess TIS psychometric indicators for both sexes.
  • Mean scores and prevalence rates of influence were calculated.
  • Multivariate regression analyzed relationships between characteristics and TIS scores.

Main Results:

  • The TIS required refinement for adequate fit but demonstrated good validity and reliability post-refinement.
  • Significant sex differences in mean scores and influence prevalence were found, with most students reporting low influence.
  • Work, supplement use, age, BMI, diet, and physical activity were related to TIS factors.
  • Women experienced greater media and peer influence than men.

Conclusions:

  • The refined TIS is a valid and reliable tool for assessing body image influences in university students.
  • Specific demographic and lifestyle factors are associated with body image influences.
  • Findings can inform clinical and research protocols addressing body image concerns.