The impact of usable system for regression analysis in higher education
© The Author(s) 2016
Received: 18 December 2015
Accepted: 14 January 2016
Published: 3 March 2016
In Mexico, both universities and professors are changing the teaching-learning process in order to improve the conditions that prevail in the classroom. These modifications are making instructors include the usage, planning, organization, and construction of various technological applications in their activities. This research proposes the design and implementation of System Usable for Regression Analysis (SUAR), the purpose of which is to customize the audiovisual content taking into account the characteristics and abilities of the students. In particular, this system adjusts the information considering the level of knowledge of the estimation of prediction and visual or auditory learning styles by the adaptation, content, and evaluation modules. This study is based on the quantitative approach to analyze the academic performance of 14 students taking the System Design course during the school year 2015-I. The ANOVA method with the significance level of 0.05 and 0.025 assess the impact of SUAR during this course accomplished at a university in the south of Mexico City. Finally, this investigation proposes to build web systems that consider SUAR architecture and usability to enhance the educational context.
KeywordsComputer-assisted instruction Online learning Distance learning Usability
Today, universities in Mexico are modifying their activities, methodologies and processes of teaching-learning in order to meet the demands of the students in the XXI century. To perform these transformations efficiently, the colleges analyze the prevailing conditions in the environment to redefine the people’s profile involved in education. In particular, Monereo & y Domínguez (2014, p.86) state that the teacher should develop “innovation competition which includes actions such as the inclusion of changes that optimize the educational process, analysis, inquiry and reflection on one’s own experience or participation in projects and quality improvement”.
According to Vázquez García (2015), one of the global trends that is influencing higher education is the online component, which involves the use of the network, Internet and new technologies for personalized information. Similarly, Ariza and Quesada (2014) explain that there is a growing tendency among professors regarding the use of technological tools which highlights the importance of the digital material’s design (videos, tutorials and assessment questions banks) to acquire and to achieve lasting and transferable knowledge.
Hepp, Prats Fernández, and Holgado Garcia (2015) established that the new learning scenarios have a transformative perspective that includes the training of tutors in relation to the educational innovations and technology where digital, open, flexible, creative, real, and participatory projects are incorporated. Also, Ongun and Demirag (2015) claim that students using multimedia resources can significantly plan their tasks through the use of visual and audio tools.
In fact, instructors get involved every day in the aspects of planning, evaluation and implementation of various software applications used in the classroom, where the aspect of usability has a preponderant importance to facilitate the assimilation and reuse of knowledge.
With this background in mind, during the 2015-I cycle, the “Systems Design” course educator has decided to build the System Usable for Regression Analysis (SUAR) in order to evaluate the teaching-learning process about the design of intelligent applications.
This study is structured as follows: the importance of usability is reviewed in the first section and the following sections describe the methodology, results, and conclusions of this investigation.
González and Farnós (2009) mention that usability refers to the degree of ease in the use of a type of product (technology) and satisfaction generated in the people characterized by the speed of access and understanding. Similarly, Ruiz et al., (2006 p.27) explain that the ISO/IECE 9126 rule states that “usability is the ability of a software product to be understood, learned and attractive to the people when it is employed under specific conditions”.
Dimensions for usability analysis
Moving between pages of the site
Types of messages
Links and labeling
Content adjusted to the pedagogical level
Ease of user location
Simple and intuitive
Links to information sources
Ease of sending and receiving
Name and credentials of the author
Visible and easily identifiable options
Little physical effort
Content in perspective and without distortion
Minimization of the use of notifications
Previous knowledge required
Stages of usability engineering
It is done to identify the users and their tasks, and the way they carry them out
It is a set of techniques used to determine how users perform a specific task
It refers to a series of usability specifications
It includes a conceptual system and a visual interaction design
Precise system prototypes are used to be easily understood by the user
The participation at this stage can vary according to the degree of involvement, providing a User Centered Design (UCD) or Participatory Design (PD)
It shows the user a set of tasks to be performed with the previously designed prototype, compiling their actions and evaluation to be analyzed later
This evaluation is based on experience of design or usability guidelines to point out the mistakes in the system
Finally, Leavitt and Shneiderman (2006) explain that the guidelines of the US Department of Health and Human Services (HHS) contain the most important features of international standards of usability for web design. In particular, the category called Process of design and evaluation allows one to analyze the use of the content for the audience, to identify the needs of the last user, to determine the interaction with the user and to assess the technological advances.
This research is based on the quantitative approach in order to analyze the academic performance of students before and after using the SUAR in the Systems Design course. According to Giroux and Tremblay (2004), this approach allows for the analyzing of the phenomena through measurement and data analysis with numbers. Furthermore Newbold, Carlson, and Thorne (2008) explained that the quantitative data have measurable meaning, which can be calculated at intervals and reasons.
According to Keller (2012), inferential statistics is the process of making an estimate, prediction, or decision about a population based on a sample. Similarly, Casas Sánchez (2010), p.20) states that “when a sample of a population is selected, a key objective is to make inferences about population characteristics or draw conclusions that are valid for the entire population”.
In this research, the sample consisted of 14 students enrolled in the Systems Design course during the school year 2015-I where SUAR is used to present the content about the regression analysis for the construction of intelligent systems. It is noteworthy that it determines the correlation between different variables in order to estimate the prediction through different types of mathematical models as linear or quadratic (Walpole, Myers, Ye, & y Myers, 2012).
The general objective of this investigation is: design, implement and evaluate the SUAR in the Systems Design course during the 2015-I cycle.
The specific objectives for this research are: design the SUAR considering the aspect of usability, implementing SUAR in the Systems Design course during the school year 2015-I, and assess the impact of SUAR during the process of teaching-learning through the ANOVA method.
Anderson, (Anderson, Sweeney, & Williams, (2008):497) state that the ANOVA method “allows the obtaining of two independent estimates of the common population variance σ2. One estimate of σ2 is based on the variability between the sample means and the variability between each sample data”.
Elements of the questionnaire on usability
Modalities or value
Audiovisual content facilitates the teaching-learning process related to prediction
Customization of audiovisual content facilitate the teaching-learning process
The navigation of the web interface is easy
Neither agree nor disagree
Audiovisual content employing audio in Spanish facilitates the teaching-learning process
Audiovisual content employing audio in English facilitates the teaching-learning process
Null hypothesis (Ho): The SUAR does not facilitate the teaching-learning process related to the design of intelligent systems.
Alternative hypothesis (Ha): The SUAR facilitates the teaching-learning process related to the design of intelligent systems.
Objectives of the design process and evaluation of HHS
Use in SUAR
Provide useful content
Audiovisual content considered the issues related to the regression analysis used in the design of intelligent web systems.
Establish user requirements
The requirements are related to the student’s learning style and his or her level of knowledge.
Consider the diversity of the interface
Programming in HTML5 enables flexibility in the browsers and operating systems used by the student
ANOVA with a significance level of 0.05 and 0.025
Origin of variations
Sum of squares
Degrees of freedom
Critical value for F (α = 0.05)
Critical value for F (α = 0.025)
Table 5 shows that the F (17.27) value is greater than the critical values of 0.05 (4.225) and 0.025 (5.658). Therefore, the null hypothesis is rejected and the alternative hypothesis is accepted, which states that the SUAR improves the process of teaching-learning related to the design of intelligent systems using regression analysis to calculate the prediction.
Results of usability
Strongly agree (1)
Somewhat agree (2)
Neither agree nor disagree (3)
Somewhat disagree (4)
Strongly disagree (5)
Table 6 shows that the prevailing opinion of the14 students regarding the three aspects of usability composed of the utility, navigation, and design categories is in the somewhat agree scale.
Conclusion and discussion
Nowadays, universities face new challenges related to the teaching-learning process where the design and implementation of cutting-edge technology is fundamental to meet the educational demands of the XXI century. Indeed, Pérez and Delgado (2012) mention the importance and necessity of undertaking various educational procedures in order to create competent individuals.
As reported by Rodríguez Aguilar, Castillo González, and y Liria Campos (2013), the success of significant learning through the use of ICT is related to the figures, images, animations and simulations on the web interface. In particular, the adaptation of content refers to the dynamic presentation of web pages (text, audio, sound, video and animation) taking into account the level of knowledge, goals and user characteristics (Kazanidis & Satratzemi, 2007).
Therefore, the responsibilities, functions and activities of the professor are changing in order to improve the teaching-learning process. One aspect that allowed the realization of these modifications is the training of tutors in the aspects related to computer and instructional design.
This research proposes the design of a usable system for regression analysis (SUAR) to facilitate the assimilation and reuse of knowledge about the planning of intelligent systems dedicated to prediction. The adaptation module manages the presentation of the audiovisual content that the student needs through the selection of the level of knowledge, subtitles and audio in Spanish and English.
González Vidal and y Blanco Encinosa (2012) explain that adaptation refers to the ability of a system to meet the needs and requirements of the user. Furthermore, the Content module stores information about the calculation of the prediction and the Questionnaire module evaluates the demands of the student to determine the user’s profile
During the construction of SUAR, the aspect of usability has a fundamental role in improving the educational conditions. According to Salaverría (2005), the great challenge of building web educational systems in the XXI century is to consider the aspect of usability. In this investigation, the needs and characteristics of students are used for analysis and identification, with the objective of personalizing the audiovisual content. On top of that, the web interface design considers factors of navigation to transmit knowledge about regression analysis in a quick, easy and intuitive. Similarly, Buitrón de la Torre M (2004) explains that building web systems is related to the ease of access and interaction through usability, which he considers as fundamental factors associated with people, tasks and context.
Through the quantitative approach, this study argues that the SUAR improves the learning conditions for students. In particular, the ANOVA method with a significance level of 0.05 and 0.025, analyzed 14 students who took the Systems Design course during the 2015-I cycle where a significant change occurred in the grade on the test (dependent variable) regarding the use of case, communication, activities, sequence and package diagrams focused on the prediction. As a matter of fact, Elizondo López (2002) explains that the experimental method is based on the deliberate production of phenomena to analyze their characteristics.
This research recommends building the web interface using HTML5 language to improve access to audiovisual content through the flexibility of the browsers and the operating systems. Meyer (2010) explains that HTML5 is changing the way transmitting information over the Internet is done because media products are efficiently spread throughout various browsers (Internet Explorer, Firefox, Opera, and Chrome) and operating systems (Linux, Mac and Windows).
Similarly, this study suggests considering the characteristics of students (visual or auditory) during the planning of web-based educational systems to present information that meets their needs and expectations. Also, the aspect of usability acquires a fundamental role in the design of the teaching-learning applications because it creates nice, simple and useful virtual spaces for pupils. As Rubin and y Chisnell (2008) mentioned, usability is related to the degree to which the user achieves its objectives (utility).
This research suggests that during the design and planning of educational systems Web Adaptation, Content and Evaluation modules should be considered in order to facilitate the assimilation and reuse of knowledge. In particular, the Adaptation module presents the information according to the characteristics and needs that students have, the content module stores the data of the course and the evaluation module determines the material that the student needs through the questionnaire. Also, usable web interface allows users to receive information demanded by the customizing audiovisual content. During the system construction, it is necessary the aspects of usability related to the utility, navigation and design to be analyzed in order to create a web interface that meets the requirements of individuals. In this study, the utility is linked to content and personalization, navigation refers to the web interface and design refers to the use of Spanish and English language. 35.71 % of students consider that the aspects of utility and navigation are in Category 1 (strongly agree) while 28.57 % placed the design in this classification.
Note that in this investigation, the results related to usability for SUAR show that the utility (42.86 %), navigation (57.14 %) and design (64.29 %) are placed in Category 2 (somewhat agree). Therefore, SUAR architecture will be improved through the use of info graphics in order to increase the percentages obtained in Category 1 (strongly agree). Of the 14 students, 12 pupils improved their qualifications related to the design of intelligent systems and 2 obtained the same results. Through the use of the ANOVA method a value of F (17.27) was obtained, which is greater than the critical values of 0.05 (4.225) and 0.025 (5.658). Therefore, the alternative hypothesis which states that the SUAR improves the process of teaching-learning related to the design of intelligent systems is accepted.
In conclusion, this study examines the design and implementation of the SUAR architecture consisting of the Adaptation, Questionnaire and Content modules to facilitate the transfer, assimilation, and reuse of knowledge explained in the classroom. In particular, this system personalizes audiovisual content in Regression Analysis to improve the teaching-learning process during the construction of intelligent applications.
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