Free Exploration Research Articles

The affordances of art for making technologies.

With this inaugural lecture as Socrates Professor on the topic of Making Humane Technologies, I aim to show that artistic practices afford embedding technologies better in society. Analyzing artworks made at RAAAF, an art collective that makes visual art and experimental architecture, I will describe three aspects of making practices that may contribute to improving the embedding of technology in society: (1) the skill of working with layers of meaning; (2) the skill of creating material playgrounds that afford free exploration of the potential of new technologies and artistic experiments; and (3) the skill of openness to the possibility of having radically different socio-material practices. I will use images of several RAAAF projects to make these skills involved in making more tangible. It is artistic skills like these that can contribute to a better societal embedding of technologies.

Sleep facilitates spatial memory but not navigation using the Minecraft Memory and Navigation task

Sleep facilitates hippocampal-dependent memories, supporting the acquisition and maintenance of internal representation of spatial relations within an environment. In humans, however, findings have been mixed regarding sleep's contribution to spatial memory and navigation, which may be due to task designs or outcome measurements. We developed the Minecraft Memory and Navigation (MMN) task for the purpose of disentangling how spatial memory accuracy and navigation change over time, and to study sleep's independent contributions to each. In the MMN task, participants learned the locations of objects through free exploration of an open field computerized environment. At test, they were teleported to random positions around the environment and required to navigate to the remembered location of each object. In study 1, we developed and validated four unique MMN environments with the goal of equating baseline learning and immediate test performance. A total of 86 participants were administered the training phases and immediate test. Participants' baseline performance was equivalent across all four environments, supporting the use of the MMN task. In study 2, 29 participants were trained, tested immediately, and again 12 h later after a period of sleep or wake. We found that the metric accuracy of object locations, i.e., spatial memory, was maintained over a night of sleep, while after wake, metric accuracy declined. In contrast, spatial navigation improved over both sleep and wake delays. Our findings support the role of sleep in retaining the precise spatial relationships within a cognitive map; however, they do not support a specific role of sleep in navigation.

Stable Working Memory and Perceptual Representations in Macaque Lateral Prefrontal Cortex during Naturalistic Vision.

Primates use perceptual and mnemonic visuospatial representations to perform everyday functions. Neurons in the lateral prefrontal cortex (LPFC) have been shown to encode both of these representations during tasks where eye movements are strictly controlled and visual stimuli are reduced in complexity. This raises the question of whether perceptual and mnemonic representations encoded by LPFC neurons remain robust during naturalistic vision-in the presence of a rich visual scenery and during eye movements. Here we investigate this issue by training macaque monkeys to perform working memory and perception tasks in a visually complex virtual environment that requires navigation using a joystick and allows for free visual exploration of the scene. We recorded the activity of 3950 neurons in the LPFC (areas 8a and 9/46) of two male rhesus macaques using multielectrode arrays, and measured eye movements using video tracking. We found that navigation trajectories to target locations and eye movement behavior differed between the perception and working memory tasks, suggesting that animals used different behavioral strategies. Single neurons were tuned to target location during cue encoding and working memory delay, and neural ensemble activity was predictive of the behavior of the animals. Neural decoding of the target location was stable throughout the working memory delay epoch. However, neural representations of similar target locations differed between the working memory and perception tasks. These findings indicate that during naturalistic vision, LPFC neurons maintain robust and distinct neural codes for mnemonic and perceptual visuospatial representations.SIGNIFICANCE STATEMENT We show that lateral prefrontal cortex neurons encode working memory and perceptual representations during a naturalistic task set in a virtual environment. We show that despite eye movement and complex visual input, neurons maintain robust working memory representations of space, which are distinct from neuronal representations for perception. We further provide novel insight into the use of virtual environments to construct behavioral tasks for electrophysiological experiments.

Sharing outer space

D.C. Fontana’s contributions to the Star Trek franchise test the epistemological consequences of sharing space. Fontana wrote screenplays for various Star Trek series from 1966 until 2006. Her scripts challenge cultural readings of progress driven by absolute individual freedom, which is an obstacle to functional community. The franchise, in idealizing free exploration, tends to celebrate the infinite accumulation of knowledge, but Fontana’s narratives destabilize and limit knowledge instead. She writes stories about cohabitation and symbiotic relationships that enable collaborative futures.

Decrease in the rewarding value of spatial novelty due to the contamination of the stimulus field with light – Evidence from a free exploration test involving rats

It has been shown that rearranging the spatial properties of a familiar environment consistently elicits a positive response in rats directed toward the source of novelty. Previous studies have been conducted under red light or darkness. The purpose of this study was to test the effect of rearranging the spatial properties of a familiar environment in conjunction with a change in lighting conditions. The results have shown specific effects of the light presence and its intensity on different behavioral measures. We propose that this study provides a basis for hypothesizing a two-way mechanism of the behavioral response to light regulation in rats. The first is based on ON/OFF states. This level may be related to fundamental, evolutionarily early, emergent components of behavioral antipredator adaptations. Another level of behavioral regulation involves mechanisms sensitive to light intensity. These appear to be involved in the regulation of more advanced behavioral acts, such as exploratory responses. This may suggest that light intensity analysis may require the involvement of more advanced cognitive components in the behavioral regulation system.

Hand explorations are determined by the characteristics of the perceptual space of real-world materials from silk to sand

Perceiving mechanical properties of objects, i.e., how they react to physical forces, is a crucial ability in many aspects of life, from choosing an avocado to picking your clothes. There is, a wide variety of materials that differ substantially in their mechanical properties. For example, both, silk and sand deform and change shape in response to exploration forces, but each does so in very different ways. Studies show that the haptic perceptual space has multiple dimensions corresponding to the physical properties of textures, however in these experiments the range of materials or exploratory movements were restricted. Here we investigate the perceptual dimensionality in a large set of real materials in a free haptic exploration task. Thirty-two participants actively explored deformable and non-deformable materials with their hands and rated them on several attributes. Using the semantic differential technique, video analysis and linear classification, we found four haptic dimensions, each associated with a distinct set of hand and finger movements during active exploration. Taken together our findings suggest that the physical, particularly the mechanical, properties of a material systematically affect how it is explored on a much more fine-grained level than originally thought.

Influence of early social isolation on general activity and spatial learning in adult WAG/Rij rats.

The study identifies the critical period of early ontogeny, during which social factors have the greatest influence on the operant behavior with positive reinforcement in adult WAG/Rij rats. Individual social isolation of rats from dam and siblings was performed daily for 3h during postnatal day (PND) 2-8, 9-15, and 16-22. General activity and water consumption were examined using the IntelliCage (IC) in adulthood. The operant behavior training was performed in four consecutive sessions: free exploration of the IC environment (adaptation), learning to retrieve water by nosepoking (nosepoke adaptation), spatial learning to retrieve water in the specific corner (place learning), and retraining with a change of a place preference (reversal learning). Social isolation during PND16-22 led to the greatest behavioral changes in all sessions of the experiment. These rats were more active, consumed more water, demonstrated a higher ratio of visits with drinking to the total number, and relearned faster after changing the location of the rewarded corner. Thus, the postnatal period between days 16 and 22 in WAG/Rij rat pups is more sensitive to social isolation for change of adaptive behavior in the IC in adulthood.

Exploring the Experience of Traveling to Familiar Places in VR: An Empirical Study Using Google Earth VR

Considered to be an emerging topic in tourism research, traveling to familiar places benefits both the travelers and destinations. However, the current development of familiar tourism is severely affected by the epidemic. Recognizing the potential of virtual reality (VR), this research aims to explore VR’s relevance in the application of visiting familiar places and the empirical features of VR beyond on-site familiar tourism. We first reviewed the literature and developed an experience framework. Secondly, we conducted an exploratory activity in which participants (N = 16) used Google Earth VR to travel to their familiar places with two conditions (free exploration and task-oriented travel). In the activity, we employed think-aloud protocols, a scale, and semi-structured interviews. With our framework, we categorized findings into five dimensions and indicated the similarities and differences between familiar tourism in VR and that in actual places. Particularly, three empirical features (the sense of distance, multi-view space, and montage time) were recognized and formed VR’s opportunity to outperform on-site travel. We conclude by discussing the impacts of VR on familiar tourism and providing implications, including designing the timeline, sounds, tasks, and virtual guides. These suggestions inspire designers to acknowledge VR limitations and identify directions for future tourism applications. As a beginning of empirical investigation on VR familiar tourism, this study opens up a new field of discussion around VR tourism experience. We invite the Human-Computer Interaction (HCI) community to collectively probe into the VR experience and design of visiting familiar places. Efforts in this area will stretch beyond the current understandings of various forms of tourism and contribute to crafting rich travel experience by immersive technologies.

Predicting Dyslexia in Adolescents from Eye Movements during Free Painting Viewing.

It is known that dyslexics present eye movement abnormalities. Previously, we have shown that eye movement abnormalities during reading or during saccade and vergence testing can predict dyslexia successfully. The current study further examines this issue focusing on eye movements during free exploration of paintings; the dataset was provided by a study in our laboratory carried by Ward and Kapoula. Machine learning (ML) classifiers were applied to eye movement features extracted by the software AIDEAL: a velocity threshold analysis reporting amplitude speed and disconjugacy of horizontal saccades. In addition, a new feature was introduced that concerns only the very short periods during which the eyes were moving, one to the left the other to the right; such periods occurred mostly during fixations between saccades; we calculated a global index of the frequency of such disconjugacy segments, of their duration and their amplitude. Such continuous evaluation of disconjugacy throughout the time series of eye movements differs from the disconjugacy feature that describes inequality of the saccade amplitude between the two eyes. The results show that both AIDEAL features, and the Disconjugacy Global Index (DGI) enable successful categorization of dyslexics from non-dyslexics, at least when applying this analysis to the specific paintings used in the present study. We suggest that this high power of predictability arises from both the content of the paintings selected and the physiologic relevance of eye movement features extracted by the AIDEAL and the DGI.

Enhancing touch sensibility by sensory retraining in a sensory discrimination task via haptic rendering.

Stroke survivors are commonly affected by somatosensory impairment, hampering their ability to interpret somatosensory information. Somatosensory information has been shown to critically support movement execution in healthy individuals and stroke survivors. Despite the detrimental effect of somatosensory impairments on performing activities of daily living, somatosensory training—in stark contrast to motor training—does not represent standard care in neurorehabilitation. Reasons for the neglected somatosensory treatment are the lack of high-quality research demonstrating the benefits of somatosensory interventions on stroke recovery, the unavailability of reliable quantitative assessments of sensorimotor deficits, and the labor-intensive nature of somatosensory training that relies on therapists guiding the hands of patients with motor impairments. To address this clinical need, we developed a virtual reality-based robotic texture discrimination task to assess and train touch sensibility. Our system incorporates the possibility to robotically guide the participants' hands during texture exploration (i.e., passive touch) and no-guided free texture exploration (i.e., active touch). We ran a 3-day experiment with thirty-six healthy participants who were asked to discriminate the odd texture among three visually identical textures –haptically rendered with the robotic device– following the method of constant stimuli. All participants trained with the passive and active conditions in randomized order on different days. We investigated the reliability of our system using the Intraclass Correlation Coefficient (ICC). We also evaluated the enhancement of participants' touch sensibility via somatosensory retraining and compared whether this enhancement differed between training with active vs. passive conditions. Our results showed that participants significantly improved their task performance after training. Moreover, we found that training effects were not significantly different between active and passive conditions, yet, passive exploration seemed to increase participants' perceived competence. The reliability of our system ranged from poor (in active condition) to moderate and good (in passive condition), probably due to the dependence of the ICC on the between-subject variability, which in a healthy population is usually small. Together, our virtual reality-based robotic haptic system may be a key asset for evaluating and retraining sensory loss with minimal supervision, especially for brain-injured patients who require guidance to move their hands.

Agency enhances temporal order memory in an interactive exploration game.

Agency has been shown to facilitate episodic memory. However, most paradigms use simple list-learning tasks, which preclude the ability to characterize more associative forms of memory, such as binding of items into spatial and temporal context. Across two studies, we characterize the role of agency on associative memory formation. We delineate agentive from passive memory encoding by allowing agency participants to play an online text-based game meant to simulate free exploration of objects in different rooms and yoking each passive participant's trajectory to an agentive participant, thus equating their exposure to the stimuli. To assess memory differences, we gathered three measures: item descriptions, spatial location, and temporal order. While memory for spatial location and item features did not differ between groups, there was a marked enhancement of temporal order memory in the agentive group across two independent samples. These findings support a model of self-directed learning, in which agency facilitates the binding of items into a temporal context, which allows for the sequential binding of information into continuous narratives.

Making-be of expressions

Although children’s inputs are actively implemented in co-creation processes, their young age calls on design researchers to apply deeper dimensions of sensitivity-in-practice to understand the voice of these very young participants. This study explores how a participatory design process can allow pre-schoolers to express their intuitive experiences of materials and demonstrate what they, using self-reliance, can do with these. This investigation is centred around materials and crafting to let children’s repertoire of expressions come forth rather than following the lead of adults. Two case studies incorporated pre-schoolers’ need for playful body sensory stimulations by triggering experimental aesthetic experiences in a three-step design process. Results identified a pre-schooler’s well-being and motivation for expression as linked to relations of self-awareness – the experience of having a role as an individual and as part of a group. Also, the distinct intuitive sensitivity of pre-schoolers to their environments resulted in understanding the meaning of free exploration of materials for child expressions in design research. This study contributes a dialogue tool mapping the sensations and connections of how children create tangible expressions as their ‘voice’. Further research should investigate improvements in well-being brought about by this tool in different high-risk groups with lower levels of well-being.

Ecumenism to Ontology: Stoker’s Theology of the Host

Abstract Bram Stoker’s novel Dracula is replete with religious symbolism, from devotional objects to sacred imagery. Despite the novel’s theological richness, little has been written on Stoker’s theology, and most criticism has focused on interpreting the novel as an affirmation of either Anglicanism or Catholicism. Building on Alison Milbank’s argument in God and the Gothic, this essay shows how Stoker’s theology eschews the boundaries of rigid dogmatism, seeking instead an ecumenical and eccentric theology. It is through such theological exploration, I argue, that the novel discovers and frames questions of ontological hierarchy. Stoker’s use of the Host, in particular, enables him to engage with sacramental presence, and to subvert tropes associated with the Gothic in a manner which plunges the novel into a mode of free theological exploration grounded in the physicality of both sinfulness and grace. Focusing on the implications of the Host in the novel, this article provides an in-depth analysis of theological meaning, showing how the novel’s premise refuses to fit into any particular doctrinal framework, and demonstrates that what lies at the core of Stoker’s vision is an ontological system which reaffirms divine primacy over the human.

Virtual Reality to Evaluate the Impact of Colorful Interventions and Nature Elements on Spontaneous Walking, Gaze, and Emotion

Green environments are said to have a positive impact on spontaneous physical activity and well-being. However, high quality psychological measures in natural settings are difficult to collect. In the present study, we offer a detailed report on how virtual reality may provide a controlled environment for immersive user testing. Virtual Reality (VR) was here used to test the impact of colorful floor markings on the spontaneous speed of walking, gaze behaviour, as well as perceived changes in and physiological mesures of affective states. The reactions of 36 adult participants were evaluated in Grey and Green VR environments of an urban university campus. Results in VR revealed similar results than that reported in natural settings: participants walked slower and had higher heart rates in Green than in Grey urban settings, indicating more pleasurable experiences. VR results provided nevertheless more detailed description of user experience with the possibility to quantify changes in gaze strategy as a function of the presence or absence of color designs. Spontaneous walking was slower with colorful designs than without. Gaze behaviour presented longer fixation times with colorful designs than without. Finally, physiological responses indicated that mean heart rates were similar across environments and predicted the physical effort of the task. However, greater means in heart rates were observed in the environments presenting colorful designs, suggesting that colors may be a powerful tool to trigger alertness and pleasure in Grey urban cities. Virtual reality is reported here as an innovative method to quantify psychological experiences during free exploration in gait. Applicable to a broad range of research topics in the psychological sciences, explicit guidelines are made available to share computer code and data sets for further exploitation.

A GoPro Look on How Children Aged 17–25 Months Assess and Manage Risk during Free Exploration in a Varied Natural Environment

Research indicates that risky play has positive effects on children’s development, learning and health, and ability to assess and manage risk, but there is a lack of knowledge on how toddlers engage in risky play. This study aims to investigate how toddlers assess and manage risk in free exploration in a varied natural environment and was conducted within an explorative qualitative approach. Observations were collected through head-mounted GoPro cameras while seven toddlers freely explored a natural environment. The results show that toddlers are able to assess and manage risks in challenging natural environments. They develop their own risk management skills and assess risks directly and indirectly. The results also show that practitioners sometimes perform risk assessment/management on behalf of the child and thus override the child’s own actions. The findings suggest implications for an early childhood education and care (ECEC) practice where children even as young as 17–25 months should be allowed to explore challenging environments and learn how to assess and manage risks.

When left is right: The effects of paw preference training on behaviour in mice

Spontaneous limb preferences exist in numerous species. To investigate the underlying mechanisms of these preferences, different methods, such as training, have been developed to shift preferences artificially. However, studies that systematically examine the effects of shifting preferences on behaviour and physiology are largely missing. Therefore, the aim of this study was to assess the impact of shifting paw preferences via training on spontaneous home cage behaviour, as well as anxiety-like behaviour and exploratory locomotion (Elevated plus maze test, Dark light test, Open field test, Free exploration test), learning performance (Labyrinth-maze) and stress hormones (fecal corticosterone metabolites) in laboratory mice (Mus musculus f. domestica). For this, we assessed spontaneous paw preferences of C57BL/6J females (Nambilateral = 23, Nleft = 23, Nright = 25). Subsequently, half of the individuals from each category were trained once a week for four weeks in a food-reaching task to use either their left or right paw, respectively, resulting in six groups: AL, AR, LL, LR, RL, RR. After training, a battery of behavioural tests was performed and spontaneous preferences were assessed again. Our results indicate that most mice were successfully trained and the effect of training was present days after training. However, a significant difference of preferences between RL and LL mice during training suggests a rather low training success of RL mice. Additionally, preferences of L mice differed from those of A and R mice after training, indicating differential long-term effects of training in these groups. Furthermore, left paw training led to higher levels of self-grooming, possibly as a displacement behaviour, and more time spent in the light compartment of the Dark light test. However, overall, there was no systematic influence of training on behavioural measures and stress hormones. Different explanations for this lack of influence, such as the link between training and hemispheric functioning or the intensity and ecological relevance of the training, are discussed.

Pupillary Light Reflex Correction for Robust Pupillometry in Virtual Reality

Virtual reality (VR) headsets with an integrated eye tracker enable the measurement of pupil size fluctuations correlated with cognition during a VR experience. We present a method to correct for the light-induced pupil size changes, otherwise masking the more subtle cognitively-driven effects, such as cognitive load and emotional state. We explore multiple calibration sequences to find individual mapping functions relating the luminance to pupil dilation that can be employed in real-time during a VR experience. The resulting mapping functions are evaluated in a VR-based n-back task and in free exploration of a six-degrees-of-freedom VR scene. Our results show estimating luminance from a weighted average of the fixation area and the background yields the best performance. Calibration sequence composed of either solid gray or realistic scene brightness levels shown for 6 s in a pseudo-random order proved most robust.

Synthesizing Personalized Construction Safety Training Scenarios for VR Training.

Construction industry has the largest number of preventable fatal injuries, providing effective safety training practices can play a significant role in reducing the number of fatalities. Building on recent advancements in virtual reality-based training, we devised a novel approach to synthesize construction safety training scenarios to train users on how to proficiently inspect the potential hazards on construction sites in virtual reality. Given the training specifications such as individual training preferences and target training time, we synthesize personalized VR training scenarios through an optimization approach. We validated our approach by conducting user studies where users went through our personalized guidance VR training, free exploration VR training, or slides training. Results suggest that personalized guidance VR training approach can more effectively improve users' construction hazard inspection skills.

Mangrove-epiphytic Plants in Selected Mangrove Rehabilitation Areas of Davao Occidental, The Philippines

The study was conducted in the mangrove rehabilitation sites of Malita, Davao Occidental, Philippines particularly Sitio Agdao of Brgy. Tubalan, Sitio Baybay of Brgy. Buhangin and Sitio Lahusan of Brgy. Fishing Village from October to December 2020. Preliminary stations were established: Station 1 in Sitio Agdao, Station 2 in Sitio Baybay and the Station 3 in Sitio Lahusan. These sites are considered to be a slightly undisturbed mangrove forest dominated by species of mangrove trees.
 The free exploration method was carried out first before the conduct of the study. Samples consisted of host plants and their associates (epiphytes) are collected for proper identification. Three study areas were assessed by the number of individual species to calculate their relative abundance and density.
 A total of 7 species identified individually among of the three-study areas. The study also shows that species of mangrove epiphytes in the study area composed of 3 to 5 species per station and exhibit 1 to 3 identified species per plot and individual species per station revealed that Davalia denticulata and Aglaomorpha quercifold were the most common species of mangrove epiphytic plants in almost all three study areas. However, Lahusan sampling station occurred numerous quantities of Mangrove epiphytic plants species among 3 identified study areas including Imprerata cycindrica that cannot be found in Agdao and Baybay Stations.
 Statistically, no significant difference was observed among study areas.

Changes in the Complexity of Limb Movements during the First Year of Life across Different Tasks.

Infants’ limb movements evolve from disorganized to more selectively coordinated during the first year of life as they learn to navigate and interact with an ever-changing environment more efficiently. However, how these coordination patterns change during the first year of life and across different contexts is unknown. Here, we used wearable motion trackers to study the developmental changes in the complexity of limb movements (arms and legs) at 4, 6, 9 and 12 months of age in two different tasks: rhythmic rattle-shaking and free play. We applied Multidimensional Recurrence Quantification Analysis (MdRQA) to capture the nonlinear changes in infants’ limb complexity. We show that the MdRQA parameters (entropy, recurrence rate and mean line) are task-dependent only at 9 and 12 months of age, with higher values in rattle-shaking than free play. Since rattle-shaking elicits more stable and repetitive limb movements than the free exploration of multiple objects, we interpret our data as reflecting an increase in infants’ motor control that allows for stable body positioning and easier execution of limb movements. Infants’ motor system becomes more stable and flexible with age, allowing for flexible adaptation of behaviors to task demands.