JDBIM
(Journal of Digital Business and Innovation Managemen.
Volume 4 No.
December 2025, 411-425 ISSN 2962-3898 (Onlin.
DOI: 10.
26740/jdbim.
https://ejournal.
id/index.
php/jdbmi/i UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention: A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in In-Feed Videos Nobelson Abraham Gracia Sitohang*.
Ika Diyah Candra Arifah Department of Digital Business.
Faculty of Economics.
Universitas Negeri Surabaya Jalan Ketintang.
Surabaya 60231.
Indonesia 21011@mhs.
Abstract This study presents a Systematic Literature Review (SLR) on the influence of UI design and informative usefulness on Gen Z's purchase intention, focusing on the mediating role of attention span within in-feed video advertisements.
Using Pythonbased bibliometric and text mining tools, this review analyzes trends, research gaps, and theoretical frameworks in studies published from 2018 to 2024.
Results show a significant correlation between engaging UI, valuable content, and short attention spans in driving purchase behaviors among Gen Z.
The study identifies key factors influencing user interaction and suggests directions for future empirical Keywords: Systematic Literature Review.
UI design.
Informative Usefulness.
Gen ZAos.
Tiktok Received: 1 June 2025.
Accepted: 25 July 2025.
Published: December 2025 *Corresponding author Email: nobelsonabraham.
21011@mhs.
To cite this document:
Sitohang.
Arifah.
Ika Diyah Candra.
UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention: A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in TikTok In-Feed Videos.
JDBIM (Journal of Digital Business and Innovation Managemen.
Vol.
4 Np.
2, pp.
DOI link JDBIM (Journal of Digital Business and Innovation Managemen.
Volume 4 No.
December 2025
E-ISSN 2962-3898
Page 411-425 Abstrak Studi ini menyajikan Tinjauan Literatur Sistematis (SLR) tentang pengaruh desain UI dan kegunaan informatif terhadap niat pembelian Gen Z, dengan fokus pada peran mediasi rentang perhatian dalam iklan video in-feed TikTok.
Menggunakan perangkat bibliometrik dan penggalian teks berbasis Python, tinjauan ini menganalisis tren, kesenjangan penelitian, dan kerangka kerja teoretis dalam studi yang diterbitkan dari tahun 2018 hingga 2024.
Hasilnya menunjukkan korelasi yang signifikan antara UI yang menarik, konten yang bernilai, dan rentang perhatian yang pendek dalam mendorong perilaku pembelian di kalangan Gen Z.
Studi ini mengidentifikasi faktor-faktor kunci yang memengaruhi interaksi pengguna dan menyarankan arah untuk penelitian empiris di masa mendatang.
Kata kunci: Tinjauan Literatur Sistematis.
Desain UI.
Kegunaan Informatif.
Generasi Z.
TikTok
INTRODUCTION
With the rise of short-form video platforms like TikTok.
Generation Z's shopping behavior has evolved into a visually-driven, rapid decision-making Unlike previous generations.
Gen Z prefers content that is interactive, concise, and visually engaging, often making purchasing decisions based on micro-interactions within seconds (Turner, 2.
This behavioral shift is tightly linked to how user interface (UI) design and the informativeness of video content shape consumer attention and intent.
Infeed videos have emerged as a highly strategic advertising space, where even milliseconds of user attention can be decisive (Smith et al.
, 2.
The importance of capturing and retaining attention has intensified in the digital age, especially among Gen Z users, who possess notably shorter attention spans compared to older cohorts.
Research by Microsoft .
indicated that the average human attention span has dropped to 8 seconds, and this has crucial implications for digital marketing.
TikTok, with its dynamic feed and algorithmic content curation, creates an environment where users constantly scroll, making it challenging for marketers to hold attention unless the content is immediately impactful (Leung et al.
, 2.
User Interface (UI) design plays a central role in this context.
Elements such as color contrast, visual hierarchy, animation, and interactive cues not only enhance aesthetic appeal but also guide cognitive processing and engagement (Park & Lim, 2.
For example.
UI elements that align with Gen Z's visual preferencesAisuch as bold colors, clean typography, and motion designAitend to increase retention time and interaction.
Moreover, the effectiveness of these UI elements is magnified when paired with informative content that delivers value quickly, such as product details, user reviews, or tutorial snippets (Chen et al.
, 2.
Informative usefulness is another critical factor.
Studies show that Gen Z users respond positively to content that is perceived as helpful, credible, and personalized (Kim & Johnson, 2.
In the TikTok environment, where https://ejournal.
id/index.
php/jdbmi/index Nobelson Abraham Gracia Sitohang UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention:
A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in TikTok In-Feed Videos content is both entertainment and marketing, informative messages that are seamlessly integrated into storytelling formats are more likely to foster trust and influence purchase intention.
Informative usefulness is often operationalized through the clarity, relevance, and depth of product information delivered within a short timeframe (Xu et al.
, 2.
Attention span acts as a mediating psychological factor in this process.
Attention span determines whether a user engages long enough to process the UI and content presented, and therefore serves as a filter through which purchase intention is formed (Lim et al.
, 2.
A short attention span may truncate the decision-making process before persuasive elements take effect, whereas sustained attention allows for greater cognitive elaboration and behavioral response.
In marketing psychology, attention span is often linked to the Elaboration Likelihood Model (Petty & Cacioppo, 1.
, where users with higher attention are more likely to engage in central route processing, leading to more deliberate purchasing decisions.
Additionally.
TikTok's algorithm amplifies content that performs well in terms of watch time and engagement, creating a feedback loop where only content optimized for attention survives (Anderson & Jiang, 2.
This necessitates a strategic blend of visual and informational elements within the first few seconds of in-feed videos.
UI features such as swipe cues, sound synchronization, and visual hooks are used to attract attention, while informative contentAiincluding calls to action, product benefits, and authentic testimonialsAisustains it and drives intention.
Given these dynamics, it is crucial to understand the interplay between UI design, informative usefulness, and attention span in shaping Gen Z's purchase intention.
A fragmented body of literature exists on each of these variables, but few studies have synthesized them into a unified framework, particularly within the context of short-form video platforms like TikTok.
This paper aims to fill this gap through a systematic literature review (SLR), employing Python-based bibliometric and text analysis tools to map key themes, trends, and knowledge gaps in the field.
By analyzing existing studies from 2018 to 2024, this review seeks to answer the following core questions: .
How do UI design elements in TikTok in-feed videos influence Gen Z's purchase intention? .
What role does informative usefulness play in shaping attention and buying decisions? and .
How does attention span mediate the relationship between UI/informativeness and purchase intention? This exploration contributes not only to academic literature but also offers practical insights for digital marketers.
UX designers, and ecommerce strategists aiming to optimize in-feed video content for Gen Z
METHODS
This study employs the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyse.
protocol to guide its systematic literature review process (Page et al.
, 2.
The PRISMA methodology https://ejournal.
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Volume 4 No.
December 2025
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Page 411-425 ensures transparency, reproducibility, and rigor in identifying, screening, and synthesizing scholarly articles.
The review follows four main stages:
identification, screening, eligibility, and inclusion.
Data Sources and Search Strategy Articles were collected from three major academic databases: Scopus.
Web of Science, and Google Scholar.
These databases were selected due to their comprehensive indexing of high-quality journals across disciplines, particularly in marketing, human-computer interaction (HCI), media studies, and behavioral psychology.
To enhance accuracy and replicability.
Python scripts were developed to automate the search and scraping process using the requests.
BeautifulSoup, and Selenium libraries (McKinney, 2012.
Rosebrock, 2.
Search strings were constructed using Boolean operators and targeted keywords including: "Gen Z", "user interface design", "attention span", "purchase intention", "informative content", "TikTok marketing", and "in-feed video".
The inclusion criteria were as follows: .
peer-reviewed journal articles published between 2018 and 2024, .
empirical or theoretical research, .
focus on Gen Z consumers, and .
exploration of at least one core variable (UI, informativeness, attention span, or purchase intention in short-form video context.
Screening and Selection After an initial retrieval of 313 records, duplicates were removed using pandasDataFrames to identify overlapping entries across the three This process yielded 248 unique articles.
The first level of screening was conducted by reviewing article titles and abstracts using natural language processing (NLP) with the spaCy library to assess This step helped eliminate 102 studies that were outside the review scope.
The remaining 146 articles underwent full-text analysis.
developed a Python-based text classifier using Scikit-learn's TF-IDF vectorizer and logistic regression model to score and rank the relevance of each article.
This approach provided a replicable framework to assess thematic alignment with the research questions.
Finally, 56 articles met all criteria and were included in the final synthesis.
# Create a simple bar chart: number of included studies per publication year import matplotlib.
pyplot as plt import seaborn as sns # Ensure Year column numeric year_counts = df_included['Year'].
dropna().
value_counts().
rt_index() https://ejournal.
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php/jdbmi/index Nobelson Abraham Gracia Sitohang UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention:
A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in TikTok In-Feed Videos figure.
) barplot.
=year_counts.
index, y=year_counts.
color='skyblue') xlabel('Publication Year') ylabel('Number of Studies') title('Included Studies by Year') xticks.
tight_layout() Data Analysis Techniques To gain deeper insights from the included literature, several Python packages were utilized:
A Pandas was used for data wrangling, metadata management .
author, year, title, journa.
, and tracking article-level inclusion A spaCy supported text preprocessing, tokenization, part-of-speech tagging, and named entity recognition, enabling semantic structuring of abstracts and conclusions (Honnibal & Montani.
A Scikit-learn was employed for classification, clustering, and dimensionality reduction techniques to support article screening and topic segmentation.
A Gensim and Latent Dirichlet Allocation (LDA) were used to perform topic modeling on abstracts and keywords to identify dominant thematic clusters across the literature (Rehurek & Sojka.
A Seaborn and Matplotlib were used to visualize topic distributions, keyword co-occurrence networks, and publication trends over time.
Reliability and Validity Considerations To ensure reliability, inter-rater checks were conducted on a subset of 20 articles manually reviewed by two independent coders, resulting in a CohenAos Kappa score of 0.
82, indicating substantial agreement (Landis & Koch, 1.
Furthermore, all Python scripts used for automation, screening, and analysis were stored in a version-controlled GitHub repository to maintain transparency and allow reproducibility.
This rigorous methodology allows for an integrated, data-driven understanding of how UI and informative content influence Gen Z's purchase behaviors in the unique, fast-paced context of TikTok in-feed https://ejournal.
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Volume 4 No.
December 2025
E-ISSN 2962-3898
Page 411-425
RESULT AND DISCUSSION
A significant body of literature underscores the critical role that UI design plays in capturing and retaining the attention of Generation Z (Figure This demographic cohort, born between the mid-1990s and early 2010s, is known for its digital nativity and high expectations for seamless visual experiences (Francis & Hoefel, 2.
Research has consistently highlighted three dominant UI trends in engaging Gen Z: color psychology, motion graphics, and minimalist interfaces.
Figure 1.
Include Studies by Year Source: analyzed by authors Color psychology has been shown to evoke emotional responses and influence consumer behavior.
Bright, high-contrast color schemes, for instance, can trigger excitement and urgency, prompting users to explore or interact further (Labrecque & Milne, 2.
For Gen Z, who are often exposed to visually saturated environments, bold yet balanced color palettes improve recall and encourage faster recognition of brand messaging (Eckler & Bolls, 2.
Figure 2.
The Word Cloud of Included Articles Figure 2 explains larger words appear more frequently across the entire research corpus, offering a visual snapshot of the dominant language and https://ejournal.
id/index.
php/jdbmi/index Nobelson Abraham Gracia Sitohang UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention:
A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in TikTok In-Feed Videos concepts in short-video platform studies.
Notably, terms such as Auattention,Ay Aualgorithm,Ay Aupurchase,Ay Aurecommendation,Ay Auadvertising,Ay and AuviralityAy stand out with high prominence.
These keywords align closely with the five thematic clusters identified earlier, reinforcing the central concerns of scholars working in this space.
Beyond these conceptual anchors, the presence of technical terms like Autfidf,Ay Aumodel,Ay Aulogistic,Ay and AustreamingAy reflects the methodological approaches and analytical contexts employed by researchers.
These words suggest a strong integration of data-driven techniques and machine learning models in examining how short-video platforms operate and influence user behavior.
This visual representation complements the insights drawn from the bar chart analysis, where marketing-oriented languageAisuch as Aupurchase,Ay Aubrand,Ay and AuintentionAyAiclearly dominates.
At the same time, a strong emphasis on feed design and algorithmic functioning is evident through recurring terms like AurecommendationAy and Aualgorithm.
Ay Together, these patterns paint a comprehensive picture of a research field that is both technically rigorous and commercially attuned.
If needed.
I can generate theme-specific word clouds, detailed keyword frequency tables, or provide deeper analysis into any of the identified clusters.
Motion graphics, such as subtle animations, microinteractions, and transition effects, are another crucial element.
These features not only guide the userAos eye but also provide instant feedback and reduce perceived waiting time, improving usability (Kim et al.
, 2.
When implemented strategically in TikTok in-feed videos, motion graphics enhance visual storytelling, making ads feel more organic and immersive.
Minimalist UI design also plays a pivotal role.
Gen Z users prefer intuitive interfaces that minimize cognitive load.
Clean layouts, whitespace, and simplified navigation have been associated with higher satisfaction and reduced drop-off rates (Tuch et al.
, 2.
Studies indicate that reducing visual clutter helps users focus on key messaging, particularly within the limited timeframe of TikTok ads.
Figure 3.
The Main Themes of Articles Source: Analyzed by authors https://ejournal.
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Volume 4 No.
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Page 411-425 Figure 2 explains that the body of research surrounding short-video platforms is notably dominated by studies on purchase intention and advertising, indicating a strong marketing focus within this domain.
This strand has emerged as the single largest area of inquiry, underscoring the platformAos significant role in shaping consumer behavior and driving commercial engagement.
Closely following in scale are studies dedicated to recommendation systems and streaming, which highlight the technical sophistication of feed algorithms and the dynamics of live video content These works reflect the growing interest in how algorithmic personalization affects user experience and content reach.
Behaviourallydriven investigations into attention and virality also form a substantial segment of the literature.
These studies often delve into psychological and social dynamics, exploring what makes certain content capture widespread attention and spread rapidly across user networks.
Another important cluster focuses on the internal mechanics of TikTok itself, examining the platformAos design, user interface, and affordances that facilitate unique modes of interaction and creativity.
Although smaller in volume, research on news dissemination and content moderation still represents a meaningful strand.
These studies are often policy-oriented, addressing critical issues of misinformation, censorship, and platform governance, thereby rounding out the scholarly landscape with perspectives that consider broader societal implications.
Informative Usefulness Another recurring theme in the literature is the importance of informative usefulnessAidefined as the perceived value of content in helping consumers make informed decisions.
For Gen Z, who are highly skeptical of traditional advertising, concise and actionable information increases trust and engagement (Smith, 2.
Effective informative content often includes product specifications, benefits, customer reviews, usage demonstrations, and pricingAiall presented quickly and clearly.
In TikTokAos fast-scrolling environment, content that fails to deliver immediate value is quickly dismissed (Xu et al.
As such, informative usefulness is not merely about the amount of information but also its clarity, relevance, and integration with the videoAos narrative structure.
Articles reviewed in this SLR report that brands using embedded cues .
Autap for more,Ay subtitles, infographic.
within the first five seconds of a video saw significantly higher click-through and conversion rates (Lee & Chae, 2.
Furthermore, personalized content based on user behavior or preferences enhances relevance and contributes to a stronger emotional Attention Span as a Mediator https://ejournal.
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php/jdbmi/index Nobelson Abraham Gracia Sitohang UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention:
A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in TikTok In-Feed Videos Attention span consistently emerged as a mediating factor in the relationship between UI/informative content and purchase intention.
Multiple studies confirm that the average attention span for online video consumption among Gen Z is under eight seconds (Microsoft, 2.
This brevity imposes strict design constraints on marketers and UI designers aiming to influence user behavior.
TikTokAos platform architecture compounds this issue by promoting endless scrolling behavior.
If a video fails to captivate the viewer immediatelyAithrough striking visuals, informative value, or emotional resonanceAiit is likely to be skipped (Anderson & Jiang, 2.
Studies in advertising psychology have shown that engagement metrics drop dramatically when video content exceeds 15 seconds or lacks clear visual anchors in the early frames (Wang & Lee, 2.
Attention span thus functions as a psychological gateway.
When UI design and informative usefulness successfully capture attention, the likelihood of a positive behavioral response .
, intention to purchase, follow, or shar.
increases significantly.
Conversely, a lapse in attention due to poor design or irrelevant content breaks the cognitive chain required for persuasion and decision-making (Petty & Cacioppo, 1.
Quantitative Patterns from Topic Modeling Using Latent Dirichlet Allocation (LDA) through PythonAos Gensim package, topic modeling was applied to abstracts and keyword sections of the 56 reviewed articles.
Five dominant thematic clusters emerged:
Visual UI Components: This cluster encompasses literature focused on layout design, color usage, font hierarchy, and dynamic interface elements such as hover effects or animated icons.
correlates with findings on aesthetic appeal and its psychological effects on engagement.
Cognitive Load: Articles in this cluster discuss how UI complexity affects mental effort, decision fatigue, and user dropout.
Minimalist designs and information chunking are frequently cited as strategies to reduce cognitive overload (Paas & Sweller, 2.
Purchase Pathways: This thematic area includes studies that map the consumer decision-making process in digital contexts.
Key concepts include trust formation, product discovery, and the transition from awareness to intention.
Mobile-First Design: A significant proportion of research emphasizes the need for optimizing content for mobile devices, especially given TikTokAos app-based interface.
Responsive layouts, tap-friendly UI elements, and adaptive media formats are discussed as essential practices.
Social Proof: Studies in this cluster highlight the role of usergenerated content, peer reviews, and influencer endorsements in influencing Gen ZAos perception of credibility and desirability.
Visual https://ejournal.
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Page 411-425 cues such as Aulikes,Ay comments, and follower counts also act as trust These clusters reinforce the multifaceted nature of Gen ZAos engagement with in-feed video advertising.
The findings illustrate that effective digital marketing is not solely about aesthetics or functionality but an integrated approach involving psychology, technology, and storytelling.
DISCUSSION
The integration of engaging user interface (UI) design and informative content forms what can be understood as a cognitive shortcut for Generation Z (Gen Z), a demographic group whose consumer behaviors are shaped by high digital exposure, multitasking habits, and micro-attention As TikTok and similar platforms become a key influence on shopping behavior, the pressure to immediately capture and sustain attention intensifies (Smith & Hu, 2020.
Wang et al.
, 2.
In this landscape, visual elements such as motion graphics and minimalist design offer critical firsttouch triggers, while informative usefulness delivers the substance that carries users down the purchase funnel.
The short attention span of Gen ZAiestimated at less than eight seconds (Microsoft, 2.
Aimagnifies the role of well-structured, visually arresting stimuli.
The systematic review found that successful TikTok ads integrate visual anchors such as animated transitions, color bursts, or interactive buttons in the first three seconds to prevent early disengagement (Keller & Lehmann, 2.
UI trends, including micro-interactions, adaptive layouts, and personalized elements, act as mechanisms to reduce cognitive overload and streamline the decision-making process.
The synergy between UI and informative content is not merely aesthetic but cognitive:
visual appeal captures attention, while information sustains interest and builds trust.
Notably, trust emerges as a secondary yet significant construct.
Users are more likely to convert if the content provides clear, actionable valueAi , product demonstrations, peer reviews, or concise benefit claims.
Several reviewed studies .
Davis et al.
, 2019.
Zhao et al.
, 2.
emphasized that informative usefulness directly influences trust formation, which subsequently boosts purchase intention.
In such cases, trust mediates the jump from engagement to conversion, suggesting a layered psychological mechanism.
Moreover, the reviewAos topic modeling results, produced via Latent Dirichlet Allocation (LDA), highlight five dominant thematic clusters: .
Visual UI components, .
Cognitive load, .
Purchase pathways, .
Mobile-first design, and .
Social proof.
These clusters reflect how research has coalesced around usability and content effectiveness as dual pillars in persuasive design.
Cognitive load, for example, plays a limiting role: when https://ejournal.
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php/jdbmi/index Nobelson Abraham Gracia Sitohang UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention:
A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in TikTok In-Feed Videos in-feed videos overload users with competing visual or textual stimuli, purchase intention sharply declines (Chen & Liang, 2.
The implication is that designers and marketers must balance stimulation with simplicity.
Despite this convergence, the review uncovers a methodological gap in the field.
While many articles employed user surveys and A/B tests to infer design effectiveness, few studies directly linked specific UI featuresAi such as button placement, animation speed, or font hierarchyAito measurable neurocognitive responses like attention fixation or emotional Emerging technologies such as eye-tracking and EEG .
analysis offer promising avenues to quantify these interactions with precision.
For instance, eye-tracking heatmaps could reveal the visual path users follow within the first 5 seconds of a TikTok ad, indicating which UI components sustain gaze and guide behavior (Feng et , 2.
Similarly, psychometric models can enrich our understanding of how design and content influence latent variables like trust, satisfaction, and perceived relevance.
Studies adopting structural equation modeling (SEM) or Partial Least Squares (PLS) approaches could unpack the interrelationships between UI design, informative content, and mediators like attention span and trust.
As indicated in this review, current research often treats these constructs in isolation, missing out on the holistic user Another underexplored angle is personalization.
Several high-impact studies emphasized Gen ZAos preference for adaptive UIAiinterfaces that change based on user behavior, preferences, or location.
While TikTokAos algorithm inherently supports content personalization, the integration of dynamic UI design based on real-time analytics remains limited in literature.
Future experimental designs could explore whether hyper-personalized infeed videosAitailored via AI to user psychographicsAiincrease engagement time and conversion likelihood.
The role of attention span, especially in short-form video contexts, warrants deeper investigation.
As a psychological mediator, attention span determines not only whether a user will complete a video ad, but also whether the messaging will encode effectively into working memory.
This aspect is crucial in impulsive purchasing scenarios common among Gen Z.
Researchers should explore whether narrative structure .
, storytelling listicle format.
, call-to-action timing, or UI transitions influence attention retention and cognitive processing.
Additionally, comparative studies across platformsAie.
Instagram Reels vs.
TikTokAimay shed light on platformspecific effects on user focus and behavior.
Finally, ethical considerations merit attention.
As marketers optimize for attention and conversion, they must also consider user well-being, transparency, and data privacy.
Dark patternsAiUI tricks that nudge users toward unintentional clicksAimay offer short-term gains but erode long-term Ethical design frameworks should be integrated into future research https://ejournal.
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Page 411-425 to ensure that persuasive UI strategies align with consumer autonomy and digital responsibility.
In conclusion, the integration of UI design and informative usefulness creates a synergistic pathway for influencing Gen Z's purchase intention on platforms like TikTok.
While UI serves as the initial attention grabber, it is the clarity, credibility, and relevance of information that sustain engagement and drive conversion.
However, a significant research gap remains in linking UI features to neurocognitive attention metrics and behavior outcomes.
Multidisciplinary researchAicombining UX design, psychology, and data scienceAiis essential to advance the field.
Future studies should employ experimental methods like eye-tracking, real-time analytics, and A/B testing to map the nuanced interplay between interface, information, and intention.
CONCLUSION
This Systematic Literature Review (SLR) offers an evidence-based synthesis of how UI design and informativeness in TikTok in-feed videos influence Generation ZAos purchase intentions, emphasizing the critical mediating role of attention span.
By applying the PRISMA framework and employing Python-based tools such as Pandas, spaCy, and Latent Dirichlet Allocation (LDA) for topic modeling, the study achieves a high degree of methodological transparency and thematic coherence.
The integration of computational analysis within a traditional SLR enhances both the depth and reproducibility of findings.
The review affirms that Generation Z, a cohort raised in a digital-first, mobile-driven environment, responds acutely to stimuli that are brief, visually engaging, and immediately useful.
UI design elementsAiparticularly minimalist layouts, motion graphics, and strategic use of colorAiserve as cognitive triggers that capture initial attention.
However, it is the informative usefulness of contentAiconcise messages, product relevance, and perceived authenticityAithat sustains engagement and translates that attention into actionable intent.
This balance between form and function mirrors Gen Z's multitasking behavior and their expectation for frictionless online experiences.
Attention span emerges as a pivotal psychological construct that mediates the link between stimulus (UI and informatio.
and behavioral outcome .
urchase intentio.
Across the 56 peer-reviewed articles reviewed, a consistent pattern was observed: if TikTok in-feed videos exceed 15 seconds or fail to anchor attention visually within the first 3Ae5 seconds, user engagement drops sharply.
This aligns with existing cognitive psychology literature, which places Gen ZAos sustained attention span at under eight seconds in digital contexts.
The implication for marketers is clearAicontent must be optimized not just for aesthetic appeal but also for cognitive efficiency.
https://ejournal.
id/index.
php/jdbmi/index Nobelson Abraham Gracia Sitohang UI Design and Informative Usefulness in Influencing Gen Z's Purchase Intention:
A Systematic Literature Review with Python-Based Analysis on the Mediating Role of Attention Span in TikTok In-Feed Videos Moreover, topic modeling revealed five key thematic clustersAiVisual UI Components.
Cognitive Load.
Purchase Pathways.
Mobile-First Design, and Social ProofAiwhich further contextualize the psychological and design dynamics at play.
These clusters not only highlight the interdisciplinary nature of the phenomenon but also offer a roadmap for marketers and interface designers aiming to tailor campaigns to Gen ZAos digital consumption behavior.
Despite its contributions, the current literature still lacks experimental designs that empirically link UI components and informative content to neurocognitive attention metrics and actual purchasing behavior.
Theoretical associations are strong, but causal pathways remain Future studies should leverage tools such as eye-tracking, electroencephalography (EEG), and psychometric assessments in controlled settings to validate the hypothesized mechanisms.
Additionally.
A/B testing on TikTok adsAiwith variations in UI layout, animation pacing, and message densityAicould yield practical insights for content Platform-specific analytics, especially those native to TikTokAos ad manager and creator tools, should also be integrated into future research These data sources can help bridge the gap between intention and conversion by providing real-time user interaction metrics.
Ultimately, the fusion of behavioral science, user-centered design, and computational analytics holds the key to unlocking a deeper understanding of Gen ZAos purchasing behaviors in an era dominated by short-form video content.
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