Does it bite? The role of stimuli characteristics on preschoolers’ interactions with robots, insects and a dog

While there is increasing interest in the impact of animal interactions upon children’s wellbeing and attitudes, there has been less attention paid to the specific characteristics of the animals which attract and engage children. We used a within-subjects design to explore how differences in animal features (such as their animacy, size, and texture) impacted upon pre-school children’s social and emotional responses. This study examined pre-schoolers’ interactions with two animal-like robots (Teksta and Scoozie), two insect types (stick insects and hissing cockroaches) and a dog (Teasel, a West Highland Terrier). Nineteen preschool participants aged 35-57 months were videoed while interacting with the experimenter, a peer and each stimulus (presented individually). We used both verbal and nonverbal behaviours to evaluate interactions and emotional responses to the stimuli and found that these two measures could be incongruent, highlighting the need for systematic approaches to evaluating children’s interactions with animals. We categorised the content of children’s dialogues in relation to psychological and biological attributes of each stimulus and their distinctions between living and non-living stimuli; the majority of comments were biological, with psychological terms largely reserved for the dog and mammal-like robot only. Comments relating to living qualities revealed ambiguity towards attributes that denote differences between living and non-living creatures. We used a range of nonverbal measures, including willingness to approach and touch stimuli, rates of self-touching, facial expressions of emotion, and touch to others. Insects (hissing cockroaches and stick insects) received the most negative verbal and nonverbal responses. The mammal-like robot (rounded, fluffy body shape, large eyes, and sympathetic sounds) was viewed much more positively than its metallic counterpart, as was the real dog. We propose that these interactions provide information on how children perceive animals and a platform for the examination of human socio-emotional and cognitive development more generally. The children engaged in social referencing to the adult experimenter rather than familiar peers when uncertain about the stimuli presented, suggesting that caregivers have a primary role in shaping children’s responses to animals

Examining the Relationship between Microorganisms and Seafood: A Focus on the Eastern Oyster (Crassostrea Virginica) and American Lobster (Homarus Americanus)

Global seafood production has grown steadily over the past 50 years, with more than 58 million people employed in capture fisheries and aquaculture worldwide. Seafood accounts for approximately 17% of the global population’s animal protein intake, and fish are among the most traded food commodities. The productivity of global fisheries is owed, in part, to the microorganisms that dominate oceanic systems. Microorganisms are the Earth’s most abundant life forms and constitute nearly half of all living biomass. They are responsible for a great deal of the oceans’ primary and secondary production and are the main drivers of Earth’s biogeochemical cycles. Given the importance of microorganisms to maintaining sustainable marine fisheries and aquaculture, I sought to: 1) understand the influence of different oyster farming practices on sediment microbial communities; 2) explain the interactions of bacteria in estuarine sediments, water columns, and oysters; and 3) characterize the bacterial communities associated with lobster shell disease. I examined the role of aquaculture in estuarine microbial communities and found that differences in oyster stocking density associated with different farming practices altered sediment microbial community structure. However, oyster farming did not increase either the number of beneficial denitrifying bacteria or the number of Vibrio, a bacterial genus containing species commonly associated with shellfish poisoning. I also compared estuarine sediments, water columns, and oyster tissues and found distinct bacterial communities in each sample type. Despite these differences, there was overlap in the core community members from different sample types. I also examined the bacteria responsible for lobster shell disease. Analysis of samples taken from diseased lobster shells revealed a distinct bacterial community at the site of disease, with significant reductions in bacterial diversity compared to clean shell. Samples 0.5 cm from the site of disease also had altered community composition even though there were no visual symptoms of disease, thus indicating that initiation of lobster shell disease may begin earlier than previously proposed. Taken together, these results further reveal the complex relationships between harvestable seafood products and the bacteria that dominate marine habitats. Understanding these relationships will become increasingly important as global reliance on seafood products grows

The Contract as Social Artifact

This article outlines a distinctive, albeit not entirely unprecedented, research agenda for the sociolegal study of contracts. In the past, law and society scholars have tended to examine contracts either through the intellectual history of contract doctrine ‘‘on the books’’ or through the empirical study of how real-world exchange relations are governed ‘‘in action.’’ Although both of these traditions have contributed greatly to our understanding of contract law, neither has devoted much attention to the most distinctive concrete product of contractual transactionsFcontract documents themselves. Without denying the value of studying either contract doctrine or relational governance, this article argues that contract documents are independently interesting social artifacts and that they should be studied as such. As social artifacts, contracts possess both technical and symbolic properties, and the sociolegal study of contract-as-artifact can profitably apply prevailing social scientific theories of technology and symbolism to understand both: (1) the microdynamics of why and how transacting parties craft individual contract devices, and (2) the macrodynamics of why and how larger social systems generate and sustain distinctive contract regimes. Seen in this light, the microdynamics of contract implicate ‘‘technical’’ theories of transaction cost engineering and private lawmaking, and ‘‘symbolic’’ theories of ceremony and gesture. In a parallel fashion, the macrodynamics of contract implicate ‘‘technical’’ theories of innovation diffusion, path dependence, and technology cycles, and ‘‘symbolic’’ theories of ideology, legitimacy, and communication. Together, these micro and macro explorations suggest that contract artifacts may best be understood as scripts and signalsFcollections of symbols designed to field technically efficacious practical action when interpreted by culture-bearing social actors within the context of preexisting vocabularies and conventions

Archaeological assessment reveals Earth's early transformation through land use

Environmentally transformative human use of land accelerated with the emergence of agriculture, but the extent, trajectory, and implications of these early changes are not well understood. An empirical global assessment of land use from 10,000 years before the present (yr B.P.) to 1850 CE reveals a planet largely transformed by hunter-gatherers, farmers, and pastoralists by 3000 years ago, considerably earlier than the dates in the land-use reconstructions commonly used by Earth scientists. Synthesis of knowledge contributed by more than 250 archaeologists highlighted gaps in archaeological expertise and data quality, which peaked for 2000 yr B.P. and in traditionally studied and wealthier regions. Archaeological reconstruction of global land-use history illuminates the deep roots of Earth's transformation and challenges the emerging Anthropocene paradigm that large-scale anthropogenic global environmental change is mostly a recent phenomenon

Archaeological assessment reveals Earth’s early transformation through land use

Humans began to leave lasting impacts on Earth's surface starting 10,000 to 8000 years ago. Through a synthetic collaboration with archaeologists around the globe, Stephens et al. compiled a comprehensive picture of the trajectory of human land use worldwide during the Holocene (see the Perspective by Roberts). Hunter-gatherers, farmers, and pastoralists transformed the face of Earth earlier and to a greater extent than has been widely appreciated, a transformation that was essentially global by 3000 years before the present.Science, this issue p. 897; see also p. 865Environmentally transformative human use of land accelerated with the emergence of agriculture, but the extent, trajectory, and implications of these early changes are not well understood. An empirical global assessment of land use from 10,000 years before the present (yr B.P.) to 1850 CE reveals a planet largely transformed by hunter-gatherers, farmers, and pastoralists by 3000 years ago, considerably earlier than the dates in the land-use reconstructions commonly used by Earth scientists. Synthesis of knowledge contributed by more than 250 archaeologists highlighted gaps in archaeological expertise and data quality, which peaked for 2000 yr B.P. and in traditionally studied and wealthier regions. Archaeological reconstruction of global land-use history illuminates the deep roots of Earth's transformation and challenges the emerging Anthropocene paradigm that large-scale anthropogenic global environmental change is mostly a recent phenomenon