Students Use of Computers and Mobile Devices for Learning and their Reading Speed on Different Platforms

This research was aimed at the investigation of mobile device and computer use at a higher learning institution. The goal was to determine the current use of computers and mobile devices for learning and the students’ reading speed on different platforms. The research was contextualised in a sample of students at the University of South Africa. Students indicated their use of computers and mobile devices for educational purposes in closed questions. The results of this case study showed that most students preferred reading from university supplied printed materials than from notes downloaded on computers or mobile devices. The percentages of students who use computers and mobile devices were calculated. Students currently use computers more than mobile devices for reading downloaded notes. A mobile eye tracker was used to analyse the students’ reading speed on paper, and on a mobile device. Screen based eye tracking was also used to analyse the participants’ reading speed when reading on a desktop screen. Participants who read on paper had the fastest reading speed than those who read on mobile device or computer screen.


Introduction
The increased availability and evolution of technology has made it easier for computers and mobile phones to be accessible at educational institutions, homes and workplaces (Wei, Moldovan and Muntean, 2009).More students now have access to the Internet on both computers and mobile phones.E-learning refers to learning where learners and tutors are separated by distance, time or both (Raab, Ellis & Abdon, 2002;Cantoni, Cellario & Porta, 2004).It is the use of the Internet to deliver learning, training, or educational material (Stockley, 2003; Sun, Tsai, Finger, Chen and Yeh, 2008) and has decreased the distance learning limitation of learning location (Blocher, De Montes, Willis and Tucker, 2002).It also includes learning through other kinds of electronic mechanisms, e.g. computer based learning material distributed on CDs, video tape, TV, DVD, intranet, extranet, satellite broadcasts and personal organisers (Kahiigi, Kigozi, Ekenberg, Hansson, Tusubira and Danielson, 2008).
The University of South Africa (UNISA) is an open distance learning institution.A paper based education has been UNISA's main delivery mechanism for many decades but the university's educational content can now be delivered on computers and on mobile devices.The purpose of this study was to investigate the use of mobile devices and computers for learning.Comparison of the reading speed on mobile device, paper and computer screen was also undertaken.

Distance Education and E-Learning
Distance education consists of processes and methods of delivering educational instruction on an individual basis to students who are physically separated from the learning institution, tutors as well as other students (Adams, 2006;Unisa, 2008).Distance education began in 1728 when Caleb Phillips advertised weekly shorthand lessons by post to students in their country (Tejeda-Delgado, Millan and Slate, 2011).This type of learning was stimulated by the development of the postal service in the 19th century (Stefanescu, Dumitru and Moga, 2009).Isaac Pitman taught shorthand by correspondence in Bath, England in the 1840s.The University of London was the first university to offer distance learning degrees in 1858.Universities used correspondence courses in the first half of the 20th century, which benefited mostly rural students (Tejeda-Delgado, MilLan, & Slate, 2011).E-learning enables geographically dispersed students from different backgrounds to study without leaving their employment or homes (Blocher, De Montes, Willis, & Tucker, 2002).

Theoretical Framework
Learning theories have been used to provide a basis on which to propose and evaluate different ways of teaching to meet the needs of learners.Davis (1989) presented the Technology Acceptance Model to model technology acceptance within organisations.

Figure 1. Technology Acceptance Model
The model proposes the following factors (Davis, 1989; Wang, Park, Chung, & Choi, 2014);  Perceived ease of use affects the adoption of a system.It is the degree of a user's belief that a certain system can be used easily without assistance. Perceived usefulness represents the degree of belief that a certain system will help them perform their job better. External variables, such as users' characteristics affect perceived usefulness and perceived ease of use. Attitude towards use is the user desirability of using a system and it increases if the system is perceived to be easy to use and useful. Behavioural intention is predicted by attitude towards use and perceived usefulness of a system. Actual use of a system is affected by the behavioural intention.
These factors may be used to explain and determine the use of mobile devices and computers for educational purposes.In this study, the researcher proposes a model for the design of content suitable for a specific platform.The Content Platform Technology Acceptance Model (CPTAM), shown in Figure 2, proposes that e-learning content designers must implement the best design strategies to suit the specific platform so that e-learning could be carried out effectively.Students may utilise tools that support e-learning, e.g.online tutorials and e-books, digital library, email, discussion forums, blogs, and the announcements area.

Mobile Devices in E-Learning
Mobile learning is a form of distance learning where the sole technologies are handheld or palmtop devices.Educational content is delivered on devices such as mobile phones, smartphones, personal digital assistants (PDAs) and tablet devices e.g.iPads.Mobile phones are portable, have advanced capabilities and can be used for situated learning.In the situated learning approach, knowledge and skills are acquired in the same context in which they are applied.Some mobile phones have components such as a keyboard, touch screen, built in camera and secure email facilities (Traxler, 2005).Educators are considering mobile devices for the delivery of study materials due to their spontaneous access to online resources and their low cost compared to desktop computers and notebooks.Mobile devices can be used alongside paper and pencil due to their small size.

Eye Tracking of Paper, Computer Screen and Mobile Device Readers
Eye tracking is a process of measuring the location and sequence of eye movements.An eye tracker is used to record eye movements and eye fixations and to evaluate usability issues and understand human performance (Conati & Merten, 2007).An eye tracker can be a head mounted or a table mounted system (Almeida, Veloso, Roque, & Mealha, 2011).These eye trackers use infrared light that is reflected from the cornea and the retina to obtain data on participants' eye movements (Cantoni, Perez, Porta, & Ricotti, 2012).
The application areas of eye tracking include usability research and market research.An analysis of user reaction to placement and variations of advertisements and products is done in order to design better products and advertisements (Morimoto & Mimica, 2005).In the automotive industry, eye tracking can be used to detect drowsiness or distraction.A controller triggers an alarm if the head position drops or if eyes close (Dasgupta & George, 2013).In a study, eye tracking technology was used to investigate the association between cognitive abilities and the complexity of a web page.Tasks were performed on simple, medium and complex Web pages.The results were used to model human behaviour by designing suitable and adaptive environments based on the assumption that individuals interact differently in web pages of different complexity (Nisiforou, Michailidou, & Laghos, 2014).Eye tracking has also been used to monitor expert and non-expert students completing tasks on a Learning Management System (LMS).The results indicated usability problems faced by the students when using the LMS (Pretorius, van Biljon, & de Kock, 2010).

Research Questions and Objectives
The objective of this research was to study how students currently use computers and mobile devices for educational purposes.The research also sought to investigate if there were differences in reading speed on paper, mobile device and computer screen.

Research Design
The data collection methods included questionnaires and eye trackers.Pre-test questionnaires were designed to collect the participants' profile data, see Table 1.Thirty participants took part in this case study.Seventeen were male and thirteen were female.One participant was below the age of 21, eleven were between the ages of 21 and 25, eleven participants were between the ages of 26 and 30 and only one participant was aged between 31 and 40.Fifteen participants indicated that they had average computer skills; thirteen reported they had high level computer skills and two stated that they had very high level computer skills.Almost all participants reported using computers and/or mobile devices for receiving and sending emails, downloading music and for communicating using Facebook and Twitter.To download music.Games, Facebook, twitter For myUnisa (or other study related Internet access)

For which of the following do you use a cell phone? (You can choose more than one)
To receive or send emails.To browse www and use online applications (e.g.online spreadsheets and presentation tools).
To download music Games, Facebook twitter For myUnisa (or other study related Internet access)

Which of the following best describes your attitude towards the Internet on your phone? ( Choose one)
I find the Internet and the applications very useful My phone has the capabilities but I rarely use them I cannot afford to use the Internet on my phone, but if I could I would.
I am not interested to use the Internet on my phone.

Which of the following best describes how you read your study material
I study from printed material provided by the University.I download the study material and then print it out to read it.I download the study material and then read it on a computer.I download the study material and then read it on a mobile phone.
In this study, quantitative methods were employed to analyse eye tracking results obtained from the experiments and qualitative methods were used to enhance interpretation of the results, thus the study was based on both the positivist and the interpretivist paradigms.
This research was conducted in the context of the University of South Africa (UNISA).In this research, convenience sampling was used.It is the selection of participants from the population using non-random procedures.Convenience sampling is a non-probability sampling technique that involves obtaining responses from people who are available and willing to take part (Kitchenham & Pfleeger, 2002).The researcher sent an invitation email to registered students.Available, accessible and registered UNISA students took part in the study.
The questionnaire comprised a set of questions to investigate the level of the participants' computer skills and the use of computers or mobile devices for educational purposes.Students had to state the platform they used for reading their study material.They were also requested to describe their attitude towards the Internet.

Eye Tracking
The Tobii T120 eye tracker was used to record how participants studied on a computer screen while the Tobii X120 eye tracker was used for the eye tracking of participants reading text in PDF format on paper and on mobile devices.The mobile device, an Apple iPad2, was attached to the mobile eye tracker's stand (see Figure 3).The chair that participants sat on was height-adjustable to accommodate different participants' heights to ensure that the participant's eyes were tracked during reading and that participants were comfortable.The Tobii T120 and X120 eye trackers have an accuracy of 0.5 degrees, a drift that is less than 0.3 degrees, sampling frequency of either 60 or 120 Hz and use infrared diodes to generate patterns on a participant's eyes.Eye tracking is the process of measuring the point of gaze or the motion of an eye relative to the head.Normal reading consists of a series of saccadic eye movements along lines of text, separated by periods of brief fixations during which the eye is relatively stationary and visual information is acquired from the text (Rayner, 2009).The eye tracking data was exported from Tobii Studio™.It is the eye tracking software that allows researchers to record and analyse eye tracking tests.The software supports the calculation of key eye tracking metrics in addition to tables and graphs to enable quantitative analysis and interpretation as well as display of results.The metrics can be exported to text, spreadsheet or to an analysis application.In this study, the researcher exported the statistical data to Microsoft Excel® .The inferential statistical analysis was done using the IBM SPSS Statistics.

Validity or Reliability of the Instruments
Calibration of the participant's eyes was carried out before the eye tracking sessions.Calibration enables the identification of a participant's eye characteristics so as to estimate the gaze point with high accuracy.Eye tracking produces precise eye tracking data, i.e. fixations and saccades.The exported statistics file also includes areas where the eye gaze was lost.The areas are indicated by a validity column whose values range from 0 to 4. If the validity is 0, it implies that the gaze point was computed with high accuracy.If validity is 4, it indicates that the eye tracker was unable to locate the participant's eye gaze.The areas that the eye tracker was not able to measure were not included in the data analysis.
Questions included in the questionnaire were tested for reliability and content and construct validity.
Content validity was done to assess whether the assessment content and composition were appropriate, given what was being measured.The Lawshe formula was used to calculate the content validity ratio.A pre-test that involved a differential groups study, was conducted to test construct validity.There were two different groups, one with the construct and one without.
The Cronbach's internal consistency reliability and testretest reliability were used to assess the reliability of the questions.The Cronbach's reliability test was used to measure internal consistency of a psychometric test.The value of alpha (α) was calculated to test the reliability score.The group was also re-tested at a later date to ensure there was a correlation between the results.

Use of computers and mobile devices for learning
The aim was to determine the current use of computers and mobile devices for learning.Students indicated their use of computers and mobile devices for educational purposes in closed questions that were in the questionnaire, see Table 2.
The students who reported using mobile devices for sending and receiving emails were 83%.Those who indicated using computers for sending and receiving emails were 97%.More students reported reading online applications on computer screen than on mobile device.Those who currently read their online applications on mobile device were 70% whilst 90% of the students read online applications on computer screen.More students use the computer screen for downloading and reading notes that are on myUnisa.Students that read notes from myUnisa on mobile device were 57% and those who currently read on computer screen were 90%.The results indicate that the majority of students currently use computers than mobile devices for reading educational materials.

Reading Speed
The page that was read by participants consisted of seven sections.The participant's reading speed for the whole page was calculated.The average speed for participants who read on paper was 150 words per minute.
Participants who read on computer screen had an average of 106 words read per minute.Those who read on mobile device had an average speed of 110 words per minute, see Table 3.
The results indicated that participants read more words on paper than on computer screen or mobile device.
The One Way Analysis of Variance, (ANOVA) was used to test if the differences in reading speed when reading on different platforms were significant.The p-value was 0.029, which was less than the alpha level of 0.05.This meant that there were statistically significant differences in the reading speed among the groups of participants that read on mobile, paper and computer screen.

Recommendations and Conclusion
The study sought to find out how students use computers and mobile devices for reading.A comparison of the number of words read per minute on the different platforms was undertaken.In this study, more students indicated that they use computers more than mobile devices for reading notes online.In the experiment students read the least words per minute on the computer screen.E-learning designers may split computer screen text into columns in order to increase the reading speed on computer screen.Reading is slightly faster for text in two columns (Dyson, 2004).
Students must be educated on the potential use of computers and mobile technology for learning.Resources and collaborative tools that are available on myUnisa include official study materials, literature search and announcements.Collaborative tools that students may make use of include discussion forums and blogs.
E-learning designers may utilise tools and technologies to improve the usability and the quality of content, such as the annotation tools that provide students the capability to annotate directly on Web documents or pages and highlight sections of digitised books.

Figure 2 .
Figure 2. Model for Content Designed for Different Platforms

For which of the following do you use a computer? (You can choose more than one)
To receive or send emails, read news and notes To browse www and use online applications (e.g.online spreadsheets and presentation tools)

Table 2 .
Current Use of Computers and Mobile Devices

Table 3 .
Number of words read per minute