Resumo

CERVANTES-LUNA, Brenda Sarahi; ALVAREZ-RAYON, Georgina; GOMEZ-PERESMITRE, Gilda Libia  e  MANCILLA-DIAZ, Juan Manuel. Reliability and constuct validity of the Body Modification Scale in adolescent males. Salud Ment [online]. 2013, vol.36, n.6, pp.487-492. ISSN 0185-3325.

Several countries have noticed not only the adoption of body change strategies by males, but these may respond to different purposes: weight loss, weight gain and increased muscle tone or muscle mass. Nevertheless, instruments that allow the assessment of these aspects in a differentially way are scanty. Therefore, the aim of the present study was to obtain the Spanish version of the Body Modification Scale (BMS), as well as to examine its psychometric properties in adolescent men. The first study included the translation, adjustment and piloting of the BMS; internal consistency and factor structure were evaluated with 270 adolescents (M_age=12.84); 171 of them participated in retest. The second study was conducted to prove, in an independent sample (n=200; M_age=13.46), the adequacy of the factor structure derived from the original. The Spanish version of the BMS indicated to have adequate internal consistency (α=.88) and test-retest reliability (r=.80). The exploratory factor analysis derived initially four factors, showing conceptual overlap between two of them; therefore, it was opted to replicate the analysis performing an extraction to three factors. These explained 44.1% of the variance, grouping 20 of the 24 original items. The loss weight and increased muscle tone or muscle mass factors showed adequate reliability (α>.86; r>.80), resulting substantially lower the weight gain factor (.63 and .74, respectively). The confirmatory factor analysis supported the adequacy of both structures; however, the model here proposed showed a better fit. In general, the Spanish version of the BMS showed adequate psychometric properties in adolescent men. Nevertheless, this should be corroborated not only in other ages, but also in women.

Palavras-chave : Body image; body weight change; reliability; validity; adolescents; men.

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