The effect of user interface on treatment engagement in a self-guided digital problem-solving intervention: A randomized controlled trial,Internet Interventions

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The effect of user interface on treatment engagement in a self-guided digital problem-solving intervention: A randomized controlled trial
Internet Interventions ( IF 3.6 ) Pub Date : 2021-08-20 , DOI: 10.1016/j.invent.2021.100448
Amira Hentati _{1,

2} , Erik Forsell ₁ , Brjánn Ljótsson ₂ , Viktor Kaldo _{1,

3} , Nils Lindefors ₁ , Martin Kraepelien _{1,

2}

Affiliation

Background

Resources are spent worldwide on the development of digital platforms and their user interfaces (UIs) for digital mental health services (DMHS). However, studies investigating the potential benefits of different UIs for DMHS are currently lacking. To fill this knowledge gap, the aim of this study was to investigate differences in treatment engagement between two different UIs for DMHS.

Methods

A total of 397 participants from the Swedish general public were randomized (1:1) to use a self-guided digital problem-solving intervention during one week, either with an optimized UI (N = 198), based on user experience (UX) design principles and with automated features, or a basic UI (N = 199), analogous with a UI used in Swedish regular health care comprising elementary UI features and less automation. Primary outcome measures were self-rated usability, on the System Usability Scale, and treatment credibility, on the Credibility/Expectancy Questionnaire. Secondary outcome measures included behavioral engagement with the intervention.

Findings

There were no significant differences between the UIs in ratings of usability or treatment credibility. However, participants who used the optimized UI were significantly more engaged with the intervention as measured by usage of the intervention at least once (odds ratio 2.54, 95% CI [1.67, 3.85]), total number of generated solutions (mean difference 1.41, 95% CI [0.72, 2.11]), and mean number of generated solutions per initiated problem-solving attempt (mean difference 1.45, 95% CI [1.06, 1.85]). Other findings included participants using the optimized UI rating the intervention as easier to understand, while feeling more overwhelmed, than those using the basic UI.

Interpretation

Our findings indicate that an optimized UI based on UX design principles, in comparison to a basic UI comprising elementary UI features, do not affect overall self-rated usability or treatment credibility but increases some measures of behavioral engagement with a digital intervention.

Funding

Funded by the Government of Sweden, Ministry of Health and Social Affairs.

中文翻译：

用户界面对自我引导数字解决问题干预中治疗参与的影响：一项随机对照试验

背景

全球范围内的资源都用于开发用于数字心理健康服务 (DMHS) 的数字平台及其用户界面 (UI)。然而，目前缺乏调查不同 UI 对 DMHS 的潜在益处的研究。为了填补这一知识空白，本研究的目的是调查 DMHS 的两种不同 UI 之间的治疗参与差异。

方法

来自瑞典公众的 397 名参与者被随机分配 (1:1) 在一周内使用基于用户体验 (UX)的优化 UI ( N = 198) 的自助式数字问题解决干预设计原则和自动化功能或基本 UI ( N = 199)，类似于瑞典常规医疗保健中使用的 UI，包括基本 UI 功能和较少的自动化。主要结果测量是在系统可用性量表上的自我评估可用性和在可信度/期望问卷上的治疗可信度。次要结果测量包括对干预的行为参与。

发现

UI 之间在可用性或治疗可信度评级方面没有显着差异。然而，使用优化 UI 的参与者对干预的参与度显着更高，通过至少一次干预的使用来衡量（优势比 2.54, 95% CI [1.67, 3.85]），生成的解决方案总数（平均差 1.41, 95% CI [0.72, 2.11]）和每次发起的解决问题尝试生成的解决方案的平均数量（平均差 1.45, 95% CI [1.06, 1.85]）。其他发现包括使用优化 UI 的参与者将干预评为比使用基本 UI 的参与者更容易理解，同时感觉更加不知所措。