Bai Yeon K, Dinour Lauren M
1 Department of Nutrition and Food Studies, Montclair State University, Montclair, NJ, USA.
J Hum Lact. 2017 Nov;33(4):658-665. doi: 10.1177/0890334417695205. Epub 2017 Mar 20.
A proper assessment of multidimensional needs for breastfeeding mothers in various settings is crucial to facilitate and support breastfeeding and its exclusivity. The theory of planned behavior (TPB) has been used frequently to measure factors associated with breastfeeding. Full utility of the TPB requires accurate measurement of theory constructs. Research aim: This study aimed to develop and confirm the psychometric properties of an instrument, Milk Expression on Campus, based on the TPB and to establish the reliability and validity of the instrument.
In spring 2015, 218 breastfeeding (current or in the recent past) employees and students at one university campus in northern New Jersey completed the online questionnaire containing demography and theory-based items. Internal consistency (α) and split-half reliability ( r) tests and factor analyses established and confirmed the reliability and construct validity of this instrument.
Milk Expression on Campus showed strong and significant reliabilities as a full scale (α = .78, r = .74, p < .001) and theory construct subscales. Validity was confirmed as psychometric properties corresponded to the factors extracted from the scale. Four factors extracted from the direct construct subscales accounted for 79.49% of the total variability. Four distinct factors from the indirect construct subscales accounted for 73.68% of the total variability.
Milk Expression on Campus can serve as a model TPB-based instrument to examine factors associated with women's milk expression behavior. The utility of this instrument extends to designing effective promotion programs to foster breastfeeding and milk expression behaviors in diverse settings.
在不同环境中对母乳喂养母亲的多维需求进行恰当评估对于促进和支持母乳喂养及其纯母乳喂养至关重要。计划行为理论（TPB）经常被用于测量与母乳喂养相关的因素。TPB的充分应用需要对理论结构进行准确测量。研究目的：本研究旨在开发并验证一种基于TPB的工具“校园挤奶情况”的心理测量特性，并确定该工具的信度和效度。
2015年春季，新泽西州北部一所大学校园的218名正在或近期进行母乳喂养的员工和学生完成了包含人口统计学和基于理论项目的在线问卷。内部一致性（α）和分半信度（r）测试以及因子分析确定并验证了该工具的信度和结构效度。
“校园挤奶情况”作为一个完整量表（α = 0.78，r = 0.74，p < 0.001）和理论结构子量表显示出很强且显著的信度。效度得到确认，因为心理测量特性与从量表中提取的因子相对应。从直接结构子量表中提取的四个因子占总变异的79.49%。从间接结构子量表中提取的四个不同因子占总变异的73.68%。
“校园挤奶情况”可作为一种基于TPB的典型工具，用于检查与女性挤奶行为相关的因素。该工具的效用扩展到设计有效的促进项目，以在不同环境中促进母乳喂养和挤奶行为。
