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Background: Though pedagogical artificial agents are expected to play a crucial role in the years to come, earlier studies provide inconsistent results regarding their effect on learning. This might be because their potential for exhibiting subtle nonverbal behaviours we know from human teachers has been untapped. What is more, there is little evidence of the processes underlying the effect of nonverbal behaviours of teachers (either human or artificial) on learning, so as to better guide their practical application. Objectives: The aims of the current research were threefold: firstly, to examine the effect of an artificial agent's vocal expressiveness on non‐verbal immediacy (teachers' ability to increase psychological closeness through nonverbal communication). Secondly, to test whether an artificial agent showing strong vocal expressiveness will enhance affective and cognitive learning (perceived and actual), as compared to an artificial agent that shows weak vocal expressiveness. Thirdly, to examine whether the underlying mechanisms of motivation and attention explain the effect of immediacy (and thereby also of vocal expressiveness) on the two learning outcomes. Methods: The study used a between‐participants design, with the participants being randomly assigned to one of the two experimental conditions: artificial modelling with strong expressiveness and artificial modelling with weak vocal expressiveness. Results and conclusions: Results showed that an artificial agent with strong vocal expressiveness increased affective and perceived cognitive learning. Partial support was found for actual cognitive learning. What is more, our findings revealed that vocal expressiveness is related to affective and perceived cognitive learning because it promotes nonverbal immediacy. Finally, results provided evidence of motivation as a mediator of the path from immediacy to affective learning. Major takeaways: The current findings verify the important role of nonverbal immediacy found in traditional educational settings. However, showing that these results also apply to artificial teachers is essential, given that the educational landscape is changing and reshaping by artificial intelligence. Thus, taking into consideration the role of vocal expressiveness in the development of artificial teachers or voice assistants like Alexa, Siri, and Google assistant, as a way to enhance immediacy and affective experience of learners is of imperative value, since they will be found more and more in our societies. Lay Description: What is currently known about the subject matter: There is a positive effect of nonverbal cues of human teachers on students' learningThe artificial agent's voice is important for learning. What their paper adds to this: Provides strong evidence of the positive effect of vocal expressiveness of artificial agents on learning outcomes.Reveals that vocal expressiveness is related to learning outcomes because it enhances immediacy.Examines the proposed mechanisms of motivation and attention as mediators of the path from immediacy to affective and cognitive learning. Implications of study findings for practitioners: Taking into consideration vocal expressiveness of artificial agents during the design process is essential for increased learning.The combination of the vocal parameters of pitch and speech rate is effective for constructing vocal expressiveness.By showing the underlying mechanisms of artificial agents' nonverbal cues (i.e., vocal cues) on learning, it helps designers to make a better decisions during construction.The study's findings are also pertinent for human teachers in improving students' learning in traditional educational settings. [ABSTRACT FROM AUTHOR]

Background: The increased availability of immersive virtual reality (IVR) has led to a surge of immersive technology applications in education. Nevertheless, very little is known about how to effectively design instruction for this new media, so that it would benefit learning and associated cognitive processing. Objectives: This experiment explores if and how traditional instructional design principles from 2D media translate to IVR. Specifically, it focuses on studying the underlying mechanisms of the redundancy‐principle, which states that presenting the same information concurrently in two different sensory channels can cause cognitive overload and might impede learning. Methods: A total of 73 participants learned through a specifically‐designed educational IVR application in three versions: (1) auditory representation format, (2) written representation format, and (3) a redundancy format (i.e. both written and auditory formats). The study utilized advanced psychophysiological methods of Electroencephalography (EEG) and eye‐tracking (ET), learning measures and self‐report scales. Results and Conclusions: Results show that participants in the redundancy condition performed equally well on retention and transfer post‐tests. Similarly, results from the subjective measures, EEG and ET suggest that redundant content was not found to be more cognitively demanding than written content alone. Implications: Findings suggest that the redundancy effect might not generalize to VR as originally anticipated in 2D media research, providing direct implications to the design of IVR tools for education. Lay Description: What is currently known about the topic: Immersive virtual reality (IVR) applications for learning are on the rise, yet little is known about how to effectively design this medium to impact learning and cognition.Even in IVR, many use traditional learning content of text and audio, and ground instructional design decisions in 2D media design guidelines, such as the Redundancy Principle.Redundancy principle states that presenting the same information concurrently in two different sensory channels can cause cognitive overload and might impede learning. What this paper adds to the field: This study examines if and how the Redundancy Principle translates from traditional 2D media to immersive VR.EEG, Eye‐tracking and objective measures were used to study the underlying mechanisms of redundant information processing. The implications of study findings for practitioners: Results show that the redundancy effect might not generalize to VR as originally anticipated in 2D media research.Study shows that the redundancy group performed equally well on learning outcomes and it wasn't found to be more cognitively loading.The study is amongst the first to reveal that participants spend most of their time reading in the redundancy condition. [ABSTRACT FROM AUTHOR]

The instructional effects of customization features in child learning games have rarely been examined. This value‐added study addresses the existing gap with regards to user‐initiated cosmetic customization of environment elements (i.e., non‐avatar customization). Participants (N = 143; Mage = 9.41) studied a biological topic for about 20 min: either using the experimental version of a learning game with customization features, or from a control version without them. Null results were found as concerns between‐group differences: both for motivation‐related variables and learning outcome measures. These findings indicate that user‐initiated cosmetic customization features can be omitted by game designers, especially in settings where children are assigned specific instructional materials from which to study. Lay Description: What is already known: User‐initiated cosmetic customization (the term user‐initiated is afterwards left out of the text for brevity) refers to making choices about a game's visual or audio attributes without directly affecting the content of gameplay itself.Studies with non‐child learners showed that a sub‐type of cosmetic customization referred to as avatar customization (i.e., customization of learners' game characters) can be potentially beneficial for learning.The instructional efficiency of other sub‐types of cosmetic customization (i.e., customization of other elements, such as environmental ones) in game‐based learning for children is less clear. What this paper adds: Children (Grades 3–4) prefer a game with a cosmetically customizable environment over its non‐customizable counterpart: but only when they can contrast these two versions (not when they cannot contrast them).Children enjoy learning and learn equally from customizable and non‐customizable games. Implications for practice: Game‐based learning with cosmetic customization features of game's environment can be used for learning without risk of harming learning outcomes.However, when children's autonomy in choosing instructional materials is restricted, there is little need to invest in the cosmetic customization of a game's environment elements.Cosmetic customization of a game's environment elements may play a more notable role when children are able to choose learning materials. [ABSTRACT FROM AUTHOR]