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Open Access Research

TV parenting practices: is the same scale appropriate for parents of children of different ages?

Tzu-An Chen*, Teresia M O’Connor, Sheryl O Hughes, Leslie Frankel, Janice Baranowski, Jason A Mendoza, Debbe Thompson and Tom Baranowski

Author Affiliations

USDA/ARS Children’s Nutrition Research Center, Baylor College of Medicine, 1100 Bates Street, Rm. 4012, Houston, TX, USA

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International Journal of Behavioral Nutrition and Physical Activity 2013, 10:41  doi:10.1186/1479-5868-10-41

Published: 2 April 2013

Abstract

Purposes

Use multidimensional polytomous item response modeling (MPIRM) to evaluate the psychometric properties of a television (TV) parenting practices (PP) instrument. Perform differential item functioning (DIF) analysis to test whether item parameter estimates differed across education, language, or age groups.

Methods

Secondary analyses of data from three studies that included 358 children between the ages of 3 and 12 years old in Houston, Texas. TV PP included 15 items with three subscales: social co-viewing, instructive parental mediation, and restrictive parenting. The multidimensional partial credit model was used to assess the performance. DIF was used to investigate the differences in psychometric properties across subgroups.

Results

Classical test theory analyses revealed acceptable internal consistency reliability (Cronbach’s α: 0.72 to 0.83). More items displaying significant DIF were found across children’s age groups than parental education or language groups. A Wright map revealed that items covered only a restricted range of the distribution, at the easier to respond end of the trait.

Conclusions

TV PP scales functioned differently on the basis of parental education, parental language, and child age, with the highest DIF among the latter. Additional research is needed to modify the scales to minimize these moderating influences. Some items may be age specific.

Keywords:
TV; Parenting practices; Multidimensional; Item response modeling; Differential item functioning