测量母乳喂养移动健康应用程序中用户对劝导设计原则感知的工具的设计和内容验证：一项改良德尔菲研究。

Design and content validation of an instrument measuring user perception of the persuasive design principles in a breastfeeding mHealth app: A modified Delphi study.

机构信息

Faculty of Engineering and Information Science, University of Wollongong, NSW 2522, Australia.

Faculty of Science, Medicine and Health, University of Wollongong, NSW 2522, Australia.

出版信息

Int J Med Inform. 2022 Aug;164:104789. doi: 10.1016/j.ijmedinf.2022.104789. Epub 2022 May 10.

DOI:10.1016/j.ijmedinf.2022.104789

PMID:35597101

Abstract

BACKGROUND

Persuasive design principles are increasingly employed in mHealth apps for motivating users and promoting healthy behaviours among individuals. However, how the persuasive design principles are perceived by the mHealth app users remains unclear.

AIM

To develop and validate the content validity of an instrument designed to measure the user's perceptions of the persuasive design principles assimilated in a breastfeeding mHealth app.

METHODS

A critical review of the literature guided the development of the research instrument. The developed instrument was refined and validated through a two-round modified Delphi process. Ten experts drawn from academic and clinical settings evaluated the items through two content validity indicators, relevance, and clarity and provided narrative feedback. The content validity of the instrument was determined by calculating the Content Validity Index (CVI). Content validity indicators at the scale-level (S-CVI) and item-level (I-CVI) were calculated.

RESULTS

The results demonstrated high content validity index of individual items in the instrument. All items in the instrument reached an excellent I-CVI ≥ 0.78 for both relevance and clarity except one item. The overall content validity index of the instrument using the average approach was moderate to high (S-CVI/Ave was 0.89 and 0.92 for relevance and clarity, respectively). The developed research instrument is composed of 5 constructs representing 24 items: (1) primary task support, (2) dialogue support, (3) system credibility support, (4) social support and (5) perceived persuasiveness.

CONCLUSIONS

Using a modified Delphi approach, the development and validation of the research instrument demonstrated moderate to high content validity for measuring users' perceptions of the persuasive design principles assimilated in a breastfeeding mHealth app. The evidence from this study supports that the research instrument is valid, relevant, and clear.

摘要

背景

在激励用户和促进个体健康行为方面，劝导设计原则越来越多地被应用于移动健康应用程序。然而，移动健康应用程序用户对劝导设计原则的感知如何仍不清楚。

目的

开发并验证一种用于测量用户对母乳喂养移动健康应用程序中整合的劝导设计原则的感知的工具的内容有效性。

方法

文献的批判性回顾指导了研究工具的开发。通过两轮修改后的德尔菲法对开发的工具进行了改进和验证。从学术和临床环境中抽取的 10 名专家通过两个内容有效性指标，即相关性和清晰度，对项目进行评估，并提供了叙述性反馈。工具的内容有效性通过计算内容有效性指数（CVI）来确定。还计算了量表水平（S-CVI）和项目水平（I-CVI）的内容有效性指标。

结果

结果表明，该工具中各个项目的内容有效性指数较高。该工具中的所有项目在相关性和清晰度方面均达到了优秀的 I-CVI≥0.78，除了一个项目。使用平均方法的工具整体内容有效性指数为中度到高度（S-CVI/Ave 分别为 0.89 和 0.92，用于相关性和清晰度）。该研究工具由 5 个代表 24 个项目的构建组成：（1）主要任务支持，（2）对话支持，（3）系统可信度支持，（4）社会支持和（5）感知说服力。