Language is multifaceted and includes Vocabulary, grammar, writing and spoken expression. In the past, the prevailing perception was that it was desirable to study the entirety of these aspects concurrently, and since written text contains all of these components, reading was considered an effective way to attain mastery of a language and enrich the learner’s Vocabulary (Read, 2004). However, studies showed that to achieve reasonable reading comprehension, the learner must know 98% of the words in the text (Waring & Nation, 2004). The interdependence between the knowledge of vocabulary and the ability to read meant that vocabulary was deemed a cornerstone in learning a foreign language.
Vocabulary is a reservoir of words at one’s disposal which constitutes the essential key to communicating and understanding social situations. It was found that the size of vocabulary predicts learning skills (Elley & Nation, 2010)..
Computer-Assisted Acceleration of Foreign Language Learning
One of the main questions is how to accelerate the learning process. Accelerated learning can occur when a learning environment meets the learner’s cognitive and emotional needs. The aspect of accelerating the time required to learn a foreign language began to be examined in the research literature in the early 1960s. These years were characterized by demographic changes and massive immigration between countries, creating a need for rapid foreign language learning accordingly.
The accelerated learning method was developed in the 1960’s by Luznov, a Bulgarian psychotherapist, in order to address the main challenge of learning a foreign language, namely, memorization.
Luznov was the first to consider accelerated learning as a teaching technique that places the learner at the center of the experience. This technique viewed the individual in a holistic manner, connecting cognitive and emotional elements during the learning processes in order to overcome negative perceptions that had previously hindered the learning processes, in general, and the learning of foreign languages, in particular (Lozanov, 2005). His approach, which developed from the study of suggestion and its effect on human behavior, included using auditory and visual variables (such as baroque music, aural messages, and measured breathing in a peaceful environment). These background cognitive and emotional stimuli evoke a physical response that creates harmony between the various body systems: heart rate, breathing and brain activity in alpha wave frequency (Bos, 2006).
Throughout the years, continual efforts have been to implement accelerated learning with different methods in the classroom and compare them to conventional learning (Colliander & Fejes, 2020; Kuninori, 2008; Akbiyik & Simsek, 2009; Guclu, Arslan & Ustunyer, 2017). Kuninori (2008) investigated the effects of music, relaxation and suggestion – on the students’ affect and development of communicative competence in Japanese language as a foreign language. Two classes were randomly assigned as a control and an experimental group. No significant effect on language learning between the two groups was found. It was found that teacher’s positive messages (suggestion) influenced students’ affect positively. Also, Akbiyik & Simsek (2009) compared the effect of the learning environment on accelerated learning by comparing two environments: in-class instruction in which the teacher promotes actions that accelerate learning versus computer-based activities that accelerate learning. No differences were found in the achievements between the two groups. In another study (Guclu, Arslan & Ustunyer, 2017), foreign students learnt to speak and read Turkish: the control group learnt through conventional teaching, while the experimental group participated in various activities, such as listening to music and singing. Students from both groups were asked to repeat the words before going to sleep and the following morning. They found that students from the experimental group acquired more new vocabulary than those in the control group.
Hence, accelerated learning through different methods is a practice that eliminates the need for memorization and reduces the period of learning, creating a unique state of retention. In order to reach this state, consideration must be given to how the human brain works during the learning process by using background cognitive and emotional Stimuli.
The principles of accelerated learning and the design of the educational computerized environment included the stimulation of the brain in order to create alpha waves. Alpha waves, with a frequency between 8-13 Hz, are linked to relaxation, mindfulness, and abstract thinking – a state that enhances memory (Bos, 2006). Researchers found that maintaining active stimulation of alpha waves throughout the learning process improves memory performance, similar to our inborn abilities (Nan et al., 2012). Other researchers found that this stimulation reduced the feeling of overload and strengthened the feeling of relaxation (Evans, 2017). Furthermore, researchers recorded how alpha wave activity enables accelerated learning (Meier, 2000). It was further found that the use of alpha waves improves working memory (Antonenko et al., 2010; Gevins & Smith, 2003); decreases the sense of cognitive overload (Antonenko et al., 2010; Gevins & Smith, 2000); enhances processing skills of semantic memory and generates an overall state of relaxation and mental alertness (Bos, 2006).
One of the mechanisms we used to stimulate the brain in alpha frequency activity was measured breathing. Measured breathing has been found to induce relaxation by diverting attention from distractions while focusing on the breathing rhythm. Hence, our system sought to focus the learner’s attention on measured breathing instead of the effort required to receive and process new words (Bos, 2006; Côté & Gaffney, 2021).
Binaural frequencies were the second mechanism we used to stimulate the brain in alpha-frequency activity. A binaural frequency is created when a different frequency is played in each ear, and the processing of each frequency creates a third frequency, which results from the gap between the two frequencies and is lower than the range of hearing (Draganova et al., 2008). Adjusting the frequency creates the binaural beat in brain wave activity, making it possible to influence cognitive functions such as concentration, focus, information processing, etc. (Wahbeh et al., 2007). Indeed, various studies observed the effect of altering binaural frequencies on cognitive abilities and working memory (Kraus & Porubanova, 2015). In addition, long-term memory (Garcia-Argibay et al., 2017), recall, and retention abilities (Freunberger et al., 2011) were also found to be affected as they reduce mental overload (On et al., 2013).
To stimulate the alpha frequency in the brain, we utilized music as a third mechanism. Music has a broad effect on altering thoughts concerning the functioning of numerous variables and is even capable of temporarily regulating cognitive functions (Thaut, 2005). Music converts mechanical energy into electrical signals of different wavelengths and stimulates several systems simultaneously: the auditory system, sight, cognition, emotion, memory, and the motor system, leading to coordination and synchronization (Ellis & Thayer, 2010; Hodges, 2000; Patel, 2010). As the brain strives for harmony and synchronization, it tends to calculate cyclic and rhythmic movement. Various studies have found this activity to affect cognitive functions and motor performance while anticipating and predicting the next auditory cycle (Reybrouck et al., 2019; Thaut, 2005).
Among the various types of music, Baroque music was found to be advantageous for learning. Baroque music, which maintains a constant rate of 50-70 beats per minute, creates a rhythmic pattern that affects physiological states such as heart rate, pulse, and breathing (Thaut, 2005). The synchronization created between the rhythm of the music and the body contributes to relaxation and stimulates thought (Peterson & Thaut, 2007). Furthermore, it was found that listening to Baroque music reduces cognitive overload, thereby improving working memory, concentration, recall, and comprehension ( De Groot, 2006). Finally, Baroque music was found to reduce tension and lower the stress level during the learning process (Hodges, 2000; Stansell, 2005).
An additional background stimulus was the use of auditory messages. The vocabulary (words and expressions) were played at a frequency above150Hz(audible) while simultaneously at 60 Hz (barely audible). Messages can be visual or auditory, visible or masked, or transmitted below the threshold of hearing or sight. Mitchell et al. (2002) presented subliminal messages of words and found that these messages automatically activate various strategies that affect the memory’s retention ability. The use of auditory subliminal messages started at the beginning of the twentieth century and continues to this day, though its effect remains controversial in the research literature (Filimon, 2010). When Mitchell et al. (2002) presented written subliminal messages, he found that they affect knowledge acquisition and retention.
More recent studies integrated subliminal stimuli messages within a learning system in a virtual environment. The assumption was that an environment of immersion that contributes to a sense of ease and removes emotional barriers will allow messages to be processed and absorbed effectively, resulting in improved and accelerated learning. Chalfoun & Frasson (2008) utilized messages which served as background cognitive stimuli and supported learning. It was found that in addition to the shortened learning period, the participants’ motivation increased in accordance with their sense of relaxation, thereby having a positive effect on their performance. To enable messages to be processed and absorbed, we integrated barely audible stimuli messages into the learning system.
However, despite the numerous studies conducted in this field that combine foreign language learning and technology, the implementation of accelerated learning in a computerized environment is still in its infancy. In the current research, we inserted emotional and cognitive background elements to teach words and to determine how a cluster of stimuli in the background, present in most learning settings, affects the speed of the learning process. The novel aspect of this study is the evaluation of specific cognitive and emotional components within a learning setting that accelerates learning a new language.
Learning a Foreign Language Using a Virtual Reality Interface
We conducted the study in a 2D computerized and Virtual Reality Headset (VRH) environment. The use of VRH in an educational framework, in general, and foreign language learning, in particular, enables the learner to interactively immerse in experiential learning situations and active learning, which is beneficial for language acquisition (Schwienhorst, 2002). In addition, the VRH environment creates a learning experience that simulates real-world situations which are dynamic and communicative and include speaking, reading, writing, and interpretation of facial expressions as opposed to traditional learning that breaks language down into the components of speaking-reading-writing (Lin & Lan, 2015; Peeters, 2019; Peixoto et al., 2019; Tandel & Dhimar, 2017). For example, one study used typical everyday scenarios, such as a visit to a virtual restaurant where the participants enacted the roles of attendants serving customers (Ebert et al., 2016). This option presented the opportunity to review this lesson numerous times, and teachers have found this to be an effective tool (Lin & Lan, 2015; Peixoto et al., 2019; Schwienhorst, 2002). In addition to the pedagogical advantages, the VRH environment of language learning was found to reduce anxiety and emotional barriers (Slater et al., 1999), alleviate boredom, minimize distractions (Dalim et al., 2020), and provide flexibility in adapting the learning environment to the specific needs of each pupil (Chen et al., 2018).
Tai et al. (2020) found that an interactive learning environment with the assistance of VRH motivates vocabulary learning to a greater extent than a 2D learning environment. The study examined two groups: one group took part in an interactive VRH environment that simulated daily life, and the second group passively observed this scenario. In a 35-minute lesson that introduced 25 new words, the first group (VRH) achieved markedly better results. It was further found that retention of information increased when a VRH environment was utilized (Krokos et al., 2019). In other words, using VRH enables a more effective learning experience and plays a significant role in retaining the learned information.
In sum, research findings regarding the effect of background cognitive and emotional stimuli on accelerated learning led us to hypothesize that (1) the implementation of background cognitive and emotional stimuli significantly increases the scope of knowledge in both the 2D computerized and the VRH environments. In light of the research findings regarding the VHR environment, we also (2) hypothesized that learning achievements in the VRH environment would be better than those in a 2D computer environment.
Learning Processing
Another aspect of the learning process deals with the depth of processing new information and its retention. According to Fabio’s dual coding studies, it was found that using two forms of representational information – verbal and visual – leads to long-term information retention (Clark & Paivio, 1991). In our study, we utilized visual and verbal representations of the learned words while integrating the background cognitive and emotional stimuli.
In addition, according to the model of the levels of processing, the differences between the various types of memory (short-term, long-term, and working memory) become evident by the volume of information processed. Instead of separating the types of memory, the model suggests referring to them as different levels that are part of a continuing process of information retention (Laufer & Goldstein, 2004).
When discussing knowledge of vocabulary, it is customary to distinguish between the size of the vocabulary (number of known words) and the depth of vocabulary knowledge. Nation (2001) described several aspects of ‘word knowledge’ and divided it into three categories: the form of the word, its meaning, and the ability to use it. This distinction differentiates between the ability to recall the word from memory (form) and the need for a clue to identify the meaning. Laufer and Goldstein (2004) added a distinction between the ability to retrieve a word from an internal association, which depends on the meaning one wishes to express, constituting active knowledge, versus the ability to recognize the word, which is passive knowledge. Using this distinction, they tested the level of knowledge and its strength and created a corresponding scale representing different types of associative knowledge. They differentiated between the ability to recall and recognize the word actively or passively. We based our study on this set of principles.
Thus, our (3) third hypothesis was that participants would achieve higher recall scores in questions than in recognition questions.
In conclusion, our study aimed to evaluate if accelerated learning occurred within a short time frame. The accelerated learning method, which includes background cognitive and emotional stimuli promotes accelerated foreign language learning in a relaxed, less stressful environment. We employed this accelerated learning method in both 2D computerized and VRH environments to examine their impact on the learning process.