Touchscreen Mobile Devices Research Articles

Methodological Problems With Online Concussion Testing.

Reaction time testing is widely used in online computerized concussion assessments, and most concussion studies utilizing the metric have demonstrated varying degrees of difference between concussed and non-concussed individuals. The problem with most of these online concussion assessments is that they predominantly rely on consumer grade technology. Typical administration of these reaction time tests involves presenting a visual stimulus on a computer monitor and prompting the test subject to respond as quickly as possible via keypad or computer mouse. However, inherent delays and variabilities are introduced to the reaction time measure by both computer and associated operating systems that the concussion assessment tool is installed on. The authors hypothesized systems that are typically used to collect concussion reaction time data would demonstrate significant errors in reaction time measurements. To remove human bias, a series of experiments was conducted robotically to assess timing errors introduced by reaction time tests under four different conditions. In the first condition, a visual reaction time test was conducted by flashing a visual stimulus on a computer monitor. Detection was via photodiode and mechanical response was delivered via computer mouse. The second condition employed a mobile device for the visual stimulus, and the mechanical response was delivered to the mobile device's touchscreen. The third condition simulated a tactile reaction time test, and mechanical response was delivered via computer mouse. The fourth condition also simulated a tactile reaction time test, but response was delivered to a dedicated device designed to store the interval between stimulus delivery and response, thus bypassing any problems hypothesized to be introduced by computer and/or computer software. There were significant differences in the range of responses recorded from the four different conditions with the reaction time collected from visual stimulus on a mobile device being the worst and the device with dedicated hardware designed for the task being the best. The results suggest that some of the commonly used visual tasks on consumer grade computers could be (and have been) introducing significant errors for reaction time testing and that dedicated hardware designed for the reaction time task is needed to minimize testing errors.

Hogyan hat a mobileszköz-használat az óvodások figyelmére és társas-kognitív készségeire?

Az érintőképernyős mobileszközöket (ÉKM: okostelefonok és tabletek) egyre többet és egyre fiatalabb korban használják a gyerekek. Ekkor az agy még nagyon plasztikus, így az ÉKM-használat befolyásolhatja a kognitív fejlődést, ami új kihívásokat támaszt a szülőkkel és pedagógusokkal szemben. Egy keresztmetszeti vizsgálatban összehasonlítottuk az ÉKM-eszközöket gyakran használó és az ilyen eszközöket nem használó óvodás korú gyerekek (szelektív és megosztott) figyelmi és szociokognitív képességeit. Majd kísérletesen vizsgáltuk, hogy miképp befolyásolja a gyerekek figyelmi teljesítményét, ha előzőleg (előkezelés) egy gyors vagy lassú sebességű digitális játékkal vagy egy nem digitális játékkal játszanak. A szelektív figyelmi feladatban a gyerekek figyelmére (ÉKM-használattól függetlenül) a globális fókusz volt jellemző (jobban teljesítettek, ha az egészre kellett figyelni, mint ha a részletre), a megosztott figyelmi feladatban azonban az ÉKM-használók atipikus, lokális fókuszt mutattak (jobban teljesítettek, amikor a kis ábra volt a célinger, mint amikor a nagy), és teljesítményük a globális próbákban elmaradt az ÉKM-eket nem használó gyerekekétől. Az ÉKM-használók gyengébb tudatelméleti teljesítményt mutattak, viszont az érzelmek felismerésében nem különböztek az ÉKM-et nem használóktól. Az előkezelésen alapuló vizsgálatunk a figyelmi működéssel kapcsolatos eredményeket kísérletesen is megerősítette: a tesztet megelőzően digitális játékkal játszó gyerekek globális fókuszt mutattak a szelektív feladatban és lokális fókuszt a megosztott figyelmi feladatban, a nem-digitális játék után viszont mindkét feladatban globális fókusz volt jellemző. Míg a nem-digitális és a lassú digitális játékkal játszó gyerekek a szelektív figyelmi feladatban jobban teljesítettek, mint a megosztottban, addig a gyors digitális játékkal játszók nem mutattak ilyen előnyt a szelektív figyelmi feladatban. Eredményeink azt mutatják, hogy az ÉKM-eszközök rövid- és hosszútávú használata és azon belül a digitális játékokkal való játék lokális figyelmi fókuszhoz vezet, talán azért, mert a digitális képernyők lokális információkban gazdagok, és ritkán látszódik egyben az egész kép. A gyors digitális játék, azáltal, hogy párhuzamosan több ingerre kell figyelni, a megosztott figyelmet fejleszti, de a szelektív figyelmet nem. Az ÉKM-használat elveszi az időt a társas tevékenységektől, ami magyarázhatja, hogy az ÉKM-használóknak nehézségeik vannak a komplexebb szociokognitív képességek terén (tudatelmélet). Eredményeink fontos ismereteket nyújtanak és irányt mutatnak a pedagógia és a pszichológia számára.

User-Silicon Entangled Mobile Identity Authentication

We explore mobile device touchscreen characteristics to build a user-device (UD) biometric physical unclonable function (PUF). Human user touchscreen interaction induces dynamic capacitive differences. Sensors detect current differences which are a function of both (1) a human biometric of how a shape is traced and (2) silicon foundry process transistor-level variability embedded in the touchscreen grid. This forms a physical function with input x defining a shape and output y abstracted from the measured current value stream. We argue and establish that this physical function has PUF attributes. Moreover, it provides a robust user-device biometric-based authentication mechanism. Authentication is based on geometric shapes (challenges) drawn on the touchscreen. Users trace them. The authentication layer creates a response abstract, and validates it against a user profile. Authentication accuracy is affected by the complexity of geometric shapes as well as the validation algorithm. We consider polyline shapes (simple gestures) and complex closed geometric shapes (complex gestures). Complex gestures offer higher response entropy, but are computationally less efficient with a slightly lower validation accuracy. Complex gestures achieve 99.6% accuracy compared with 100% for simple gestures. User profiles exhibit physical unclonable function (PUF) properties. Touchscreen gestures are quantized into binary strings. Gesture hamming distance is 60+ bits for 128-bit strings for different user-device profiles; it is 0 bits for the same profile. This demonstrates variability and reproducibility respectively. Montreal TestU01 tests binary string pseudorandom characteristics; the majority of tests pass showing pseudorandom number generator (PRG) characteristics.

Isolation of Gram-Positive, Antibiotic-Resistant Bacteria from Tactile Mobile Phones in a Northwestern Mexican City.

The widespread use of touch-screen mobile devices renders them potential fomites for the transmission of bacterial pathogens among users of different ages. The objectives of the present research were to isolate bacteria from mobile phones, perform molecular and phylogenetic identification, and determine the antibiotic resistance profiles. The surfaces of 50 touch-screen mobile devices owned by bystanders were sampled in the city center of Culiacan, Sinaloa, Mexico. The samples were cultured on nutritive agar; 13 bacterial colonies were isolated and characterized based on their macroscopic and microscopic characteristics and then identified using PCR amplification and sequencing of the 16S rRNA gene V4 and V6 regions. Their taxonomic relationships were determined via a Bayesian inference approach. Antimicrobial resistance was evaluated via disc diffusion and broth microdilution assays. Species of the genera Staphylococcus, Bacillus, and Enterococcus were identified on 84.6, 7.7, and 7.7% of the mobile phones, respectively. A unique subgroup of Staphylococcus epidermidis was identified in strains FBOPL-23, CAEPL-28, and FREPL-28. Staphylococcus hominis novobiosepticus was also identified on mobile phones for the first time. Of the isolated bacteria, 92.3% were resistant to erythromycin, 76.9% to ampicillin and penicillin, 61.5% to dicloxacillin, 38.5% to cephalothin and 7.7% to cefotaxime and ceftriaxone. The presence of antibiotic-resistant bacteria of clinical relevance poses potential risks to users' health and the dissemination of antibiotic resistance mechanisms throughout the community; thus, we recommend regular cleaning to prevent cross-infection by multidrug-resistant bacteria when using touch-screen mobile devices.

Layout Transposition for Non-Visual Navigation of Web Pages by Tactile Feedback on Mobile Devices.

In this paper, we present the results of an empirical study that aims to evaluate the performance of sighted and blind people to discriminate web page structures using vibrotactile feedback. The proposed visuo-tactile substitution system is based on a portable and economical solution that can be used in noisy and public environments. It converts the visual structures of web pages into tactile landscapes that can be explored on any mobile touchscreen device. The light contrasts overflown by the fingers are dynamically captured, sent to a micro-controller, translated into vibrating patterns that vary in intensity, frequency and temperature, and then reproduced by our actuators on the skin at the location defined by the user. The performance of the proposed system is measured in terms of perception of frequency and intensity thresholds and qualitative understanding of the shapes displayed.

Analisis Pengaruh Citra Merek dan Kualitas Produk Terhadap Loyalitas Pengguna Smartphone Android dengan Kepuasan Sebagai Variabel Intervening Di Lingkungan Mahasiswa Universitas Bandung Raya

Abstract : Along with the development of the telecommunications industry in Indonesia, making communication both close and long distance communication becomes easier and smoother. Cellular phone (cellphone) is one of the communication technologies that has developed from year to year. The Android operating system is a Linux-based operating system designed for touch screen mobile devices such as smartphones and tablet computers. By providing a development platform that is open (open source), Android developers offer the ability to build applications that are very rich and innovative and of course very profitable for consumers because it is relatively freeware (most applications are free). This study tries to examine the effect of brand image and product quality on the loyalty of Android-based smartphone users in the University of Bandung Raya environment, both directly and indirectly through satisfaction as an intervening variable. This study uses a survey approach and the nature of this research is explanatory research. The population in this study were Bandung Raya University students who used registered and active Android-based smartphones from 2017 odd semester until 2018. The sampling method used was the non-probability sampling method with a total of 100 people. The sampling technique is done by purposive sampling. Hypothesis testing uses Structural Equation Modeling (SEM) analysis. Through the analysis of indirect influence data, only product quality has a significant effect on loyalty through student satisfaction at the University of Bandung Raya. Whereas through direct influence, obtained only brand image and satisfaction that have a significant effect on loyalty within the University of Bandung Raya students.

The impacts of situational impairment on touch gestures in public spaces: Walking in sunlight

In recent years, the use of touchscreen mobile devices in a variety of places and contexts has been raised. Specific interaction context induced impairment and disabilities that can limit the usage of these devices. For instance, the use of a mobile device while walking in sunlight limits the visual attention and results in performance reduction. In this paper, we present a study that investigates distinctions between the made gestures by individuals in two different situations: while walking in sunlight glare and sitting at a table without visibility impairment. The results show that (1) the individuals tend to draw larger and broader gestures in situational impairment, (2) the variation in the time and speed depended on the user familiarity with the gestures, and (3) there wasn't great different behavior in how to apply strokes.

A software to prevent delirium in hospitalised older adults: development and feasibility assessment.

non-pharmacological interventions to prevent delirium are useful in hospitalised older adults. However, they are poorly implemented in clinical practice. We aimed to develop a software for bedside use by hospitalised older adults and to improve their access to these interventions. a transdisciplinary team composed of healthcare professionals, designers, engineers and older adults participated in the development of the software. Scrum methodology was used to coordinate the work of the team, and the software was evaluated in a feasibility study. a software for touchscreen mobile devices that supports Android 5.0 or later was produced, including modules for time-spatial re-orientation, cognitive stimulation, early mobilisation, sensorial support use promotion, sleep hygiene and pain management optimisation. Horizontal disposition, use of colour contrast and large interaction areas were used to improve accessibility. The software's usability and accessibility were evaluated in 34 older adults (average age 73.2 ± 9.1years) showing that 91.1% of them got access to all the software functions without previous instructions. The clinical feasibility assessment showed that 83.3% of the 30 enrolled hospitalised patients (76 ± 8years) completed the 5-day protocol of software usage during hospitalisation. Software use was associated with a decreased trend in delirium incidence of 5 of 32 (15.6%) at baseline to 2 of 30 (6.6%) after its implementation. a highly accessible and implementable software, designed to improve access to non-pharmacological interventions to prevent delirium in hospitalised older adults, was developed. The effectiveness of the software will be evaluated in a randomised clinical trial.

A prospective longitudinal study of mobile touch screen device use and musculoskeletal symptoms and visual health in adolescents

This study aimed to examine prospective associations of mobile touch screen device (i.e. smartphone, tablet) use and patterns of use with musculoskeletal symptoms and visual health among adolescents. A representative sample of 1691 adolescents in Singapore (51% girls; 10–19 years) completed an online questionnaire at baseline and one-year follow-up. After adjusting for potential confounders, prospective associations were found between baseline smartphone use and follow-up neck/shoulder (OR = 1.61(95%CI = 1.06–2.44)) and low back (OR = 1.86(1.10–3.14)) symptoms; tablet use was also associated with neck/shoulder, low back and arms symptoms (OR = 1.33(1.04–1.71)to1.52(1.18–1.95)). No associations were observed between the duration of smartphone/tablet use and symptoms. Baseline patterns of use (bout length, certain types of activities, multitasking) were associated with follow-up musculoskeletal symptoms. Smartphone/tablet use was not related to visual outcomes (visual symptoms, wearing glasses/contact lenses, myopia) at follow-up. These findings suggest that patterns of smartphone/tablet use (though not the duration of use) can pose a prospective risk for musculoskeletal symptoms.

Strengthen user authentication on mobile devices by using user\u2019s touch dynamics pattern

Mobile devices, particularly the touch screen mobile devices, are increasingly used to store and access private and sensitive data or services, and this has led to an increased demand for more secure and usable security services, one of which is user authentication. Currently, mobile device authentication services mainly use a knowledge-based method, e.g. a PIN-based authentication method, and, in some cases, a fingerprint-based authentication method is also supported. The knowledge-based method is vulnerable to impersonation attacks, while the fingerprint-based method can be unreliable sometimes. To overcome these limitations and to make the authentication service more secure and reliable for touch screen mobile device users, we have investigated the use of touch dynamics biometrics as a mobile device authentication solution by designing, implementing and evaluating a touch dynamics authentication method. This paper describes the design, implementation, and evaluation of this method, the acquisition of raw touch dynamics data, the use of the raw data to obtain touch dynamics features, and the training of the features to build an authentication model for user identity verification. The evaluation results show that by integrating the touch dynamics authentication method into the PIN-based authentication method, the protection levels against impersonation attacks is greatly enhanced. For example, if a PIN is compromised, the success rate of an impersonation attempt is drastically reduced from 100% (if only a 4-digit PIN is used) to 9.9% (if both the PIN and the touch dynamics are used).

THE IMPACT OF MOBILE TOUCH SCREEN DEVICE USE ON MUSCULOSKELETAL SYSTEM: A LITERATURE REVIEW

People using mobile touch screen devices (MTSDs) have been exposed to the musculoskeletal disorder because of physical risk factors. As being lightweight; the latest generations of MTSDs are preferred for personal and work purposes as they are comfortable to operate and easy to carry. Furthermore, they have many advantageous facilities compared to conventional devices. This study aims to survey previous researches on the effects of MTSDs use on the musculoskeletal disorder. In this scope; published researches on musculoskeletal disorders, postural problems, and kinematic activities at upper extremities among people who use mobile phones or tablets for daily use are investigated. The articles reviewed were cited based on the research made from Web of Science, Scopus, ProQuest, Elsevier Science Direct, and Google Scholar. The method selected in this study was to review published studies from January 2010 to December 2019 on occurrence of discomfort symptoms in different positions of the body parts and muscular activities in upper extremities among people who use MTSDs.

Statistical Test Methodology for Evaluating Electromagnetic Information Leakage From Mobile Touchscreen Devices

This paper presents a statistical-test-based methodology for evaluating the electromagnetic (EM) emanations from mobile touchscreen devices. These EM emanations potentially contain information that can be exploited to reconstruct screen images of the device remotely. The proposed method evaluates the threat of such EM-based information leakage by performing a statistical test of measured EM waves and environmental noise without performing ad-hoc screen restoration or image processing. In particular, we employ the Kolmogorov–Smirnov test, a nonparametric statistical test method, to compare two distributions of radiated EM waves: one that potentially contains screen information and another with environmental noise. In addition, this paper demonstrates the validity of our methodology via experiments involving authentic tablet devices in real-world settings and discusses a possible method to determine the confidence interval that can be adopted as a criterion for security evaluation depending on the environment.

Mobile touch screen device use and associations with musculoskeletal symptoms and visual health in a nationally representative sample of Singaporean adolescents

This study aimed to describe contemporary technology use, especially smartphones and tablets (mobile touch screen devices), and examine associations with musculoskeletal symptoms and visual health among adolescents in Singapore. A representative sample of 1884 adolescents (50.4% girls) from grades primary 5 to post-secondary (10–18 years old), recruited from 13 schools, completed an online questionnaire in class. Total technology use was high, with smartphone duration being highest (mean = 264 [SD = 243] min/day). Patterns of use, including multitasking and bout length, were influenced by gender, school level, type of device and activities. Musculoskeletal discomfort and visual symptoms were commonly reported. After adjusting for potential confounders, more hours/day of smartphone use was associated with increased risk of neck/shoulders, upper back, arms and wrist/hand discomfort (OR = 1.04[95%CI = 1.01–1.07] to 1.07[1.03–1.10]) and visual symptoms (OR = 1.05[1.02–1.08]), but was associated with decreased odds of myopia (OR = 0.97[0.94–0.99]). No significant associations were found for tablet use.Practitioner Summary: 1884 adolescents in Singapore completed an in-depth questionnaire regarding their use of technology. The smartphone was the device with the highest usage, and greater smartphone use was associated with increased odds of musculoskeletal and visual symptoms. High use of smartphones has physical health implications for adolescents.

\u201cFrom the moment I wake up I will use it\u2026every day, very hour\u201d: a qualitative study on the patterns of adolescents\u2019 mobile touch screen device use from adolescent and parent perspectives

BackgroundThe use of mobile touch screen devices, e.g. smartphones and tablet computers, has become increasingly prevalent among adolescents. However, little is known about how adolescents use these devices and potential influences on their use. Hence, this qualitative study explored adolescents’ perceptions on their patterns of use and factors influencing use, and perceptions and concerns from parents.MethodsSemi-structured interviews were conducted with adolescents (n = 36; 11 to 18 years) and their parents/caregivers (n = 28) in Singapore recruited to represent males and females across a range of ages from different socioeconomic groups. Prompts covered weekday and weekend use patterns, types of activities, perspectives on amount of use, parental control measures and concerns. Interviews were recorded and transcribed. Transcripts were coded and thematic analysis was carried out.ResultsSmartphone was the most common mobile device owned and used by many of the adolescents, while only some used a tablet. Many adolescents and their parents felt that adolescents’ MTSD use was high, frequent and ubiquitous, with frequent checking of device and multitasking during use. Reported influences of use included functional, personal and external influences. Some of the influences were irresistibility of mobile devices, lack of self-control, entertainment or relaxation value, and high use by peers, family and for schoolwork that contributed to high use, or school/parental control measures and lack of internet availability that limited use. Most adolescents were generally unconcerned about their use and perceived their usage as appropriate, while most parents expressed several concerns about their adolescents’ use and perceived their usage as excessive.ConclusionsThis study has provided rich insights into the patterns and influences of contemporary mobile device use by adolescents. Mobile device use has become an integral part of adolescents’ daily routines, and was affected by several functional, personal and external influences which either facilitated or limited their use. There also seemed to be a strong inclination for adolescents to frequently check and use their mobile devices. There is an urgent need to understand the implications of these common adolescent behaviours to inform advice for wise mobile device use by adolescents.

Mobile Application Development with Android

The Android is mobile platform. It is an open source and free operating system application, by Google it is developed and maintained. It was designed essentially for touch screen mobile devices, such as and tablet, computers, smart phones, watch television, cars etc. Android is one of the most widely used mobile OS. Android is a not only operating system but also key applications and middleware. Android is an open source operating system. It is developed by the open handset Alliance, led by Google, and other companies. Those are used to android studio 2.2.3 version and development the mobile application.

Mobile Application Design Emergency Medical Call for the Deaf using UCD Method

<p>Deaf or hearing loss is a condition of inability to hear something, either totally or partially. Hearing loss greatly affects the life of a person in communicating with the people around him. Deaf people will be very difficult when in a medical emergency, this is because the medical emergency situation requires fast action.</p><p> The Healthy Phone application is a mobile medical emergency call application that can help people with hearing impaired when in emergency situations. With the Healthy Phone application, the user only needs to select an icon that suits the situation encountered in touchscreen mobile device then the message will be sent to the nearest hospital.</p> To search for icons corresponding to emergencies, the User Centered Design (UCD) method is used. This application is very helpful for deaf people because this application does not require audio communication and user location is also sent automatically to the nearest hospital. The results were analyzed using four emergency event scenarios with a total score of 87% and an average user time of less than 0:42 sec indicating that the study was successful in designing a mobile medical emergency call application according to user requirements.

A Comparative Evaluation of Spatial Targeting Behaviour Patterns for Finger and Stylus Tapping on Mobile Touchscreen Devices

Models of 2D targeting error patterns have been applied as a valuable computational tool for analysing finger touch behaviour on mobile devices, improving touch accuracy and inferring context. However, their use in stylus input is yet unexplored. This paper presents the first empirical study and analyses of such models for tapping with a stylus. In a user study (N = 28), we collected targeting data on a smartphone, both for stationary use (sitting) and walking. We compare targeting patterns between index finger input and three stylus variations -- two stylus widths and nib types as well as the addition of a hover cursor. Our analyses reveal that stylus targeting patterns are user-specific, and that offset models improve stylus tapping accuracy, but less so than for finger touch. Input method has a stronger influence on targeting patterns than mobility, and stylus width is more influential than the hover cursor. Stylus models improve finger accuracy as well, but not vice versa. The extent of the stylus accuracy advantage compared to the finger depends on screen location and mobility. We also discuss patterns related to mobility and gliding of the stylus on the screen. We conclude with implications for target sizes and offset model applications.

Investigating the association between children’s screen media exposure and vocabulary size in the UK

Children are growing up in a digital age with increasing exposure to television and touchscreen devices. We tested whether exposure to screen media is associated with children’s early language development. One hundred and thirty-one highly educated caregivers of UK children aged 6–36 months completed a media exposure questionnaire and vocabulary measure. 99% of children were read to daily, 82% watched television, and 49% used mobile touchscreen devices daily. Regression analyses revealed that time spent reading positively predicted vocabulary comprehension and production scores at 6–18 months, but time spent engaging with television or mobile touchscreen devices was not associated with vocabulary scores. Critically, correlations revealed that time spent reading or engaging with other non-screen activities was not offset by time spent engaging with television or mobile touchscreen devices. Thus, there was no evidence to suggest that screen media exposure adversely influenced vocabulary size in our sample of highly educated families with moderate media use.

The associations of mobile touch screen device use with musculoskeletal symptoms and exposures: A systematic review.

BackgroundThe use of mobile touch screen devices (MTSDs) has increased rapidly over the last decade, and there are concerns that their use may have negative musculoskeletal consequences; yet evidence on the association of MTSD use with musculoskeletal symptoms and exposures is currently dispersed. The aim of this study was to systematically review available literature on musculoskeletal symptoms and exposures associated with MTSD use. The synthesised information may facilitate wise use of MTSDs and may identify areas in need of further research.MethodsEMBASE, Medline, Scopus, PsycINFO and Proquest electronic databases were searched for articles published up to June 2016, using keywords describing MTSD, musculoskeletal symptoms (e.g. pain, discomfort) and musculoskeletal exposures (e.g. posture, muscle activity). Two reviewers independently screened the articles, extracted relevant data and assessed methodological quality of included studies. Due to heterogeneity in the studies, a meta-analysis was not possible and a structured narrative synthesis of the findings was undertaken.ResultsA total of 9,908 articles were screened for eligibility with 45 articles finally included for review. Included articles were of cross-sectional, case-control or experimental laboratory study designs. No longitudinal studies were identified. Findings were presented and discussed in terms of the amount, features, tasks and positions of MTSD use and its association with musculoskeletal symptoms and musculoskeletal exposures.ConclusionsThere is limited evidence that MTSD use, and various aspects of its use (i.e. amount of usage, features, tasks and positions) are associated with musculoskeletal symptoms and exposures. This is due to mainly low quality experimental and case-control laboratory studies, with few cross-sectional and no longitudinal studies. Further research is warranted in order to develop guidelines for wise use of MTSDs.

Affordance Access Matters: Preschool Children’s Learning Progressions While Interacting with Touch-Screen Mathematics Apps

The purpose of this study was to contribute to the research on mathematics app use by very young children, and specifically mathematics apps for touch-screen mobile devices that contain virtual manipulatives. The study used a convergent parallel mixed methods design, in which quantitative and qualitative data were collected in parallel, analyzed separately, and then merged. During the study, 35 children, ages 3–4, interacted with four touch-screen mathematics apps on iPad devices during one-on one clinical interviews while learning seriation and counting. Researchers administered pre and post assessments of learning during the interviews. Each interview was videotaped using a wall-mounted camera and a GoPro camera to provide different views of the interview. Videos were analyzed to examine children’s learning progressions, access of affordances, and patterns of behavior while interacting with the mathematics apps. The results suggest that different affordances of the individual apps were perceived in different ways, depending on the age of the child, and that these perceptions were observable in young children’s patterns of behavior. Implications are discussed for iPad app use in young children’s educational settings.