Multimedia-Supported Metaphors for Meaning Making in Mathematics

We examined a number-line metaphor presented using interactive multimedia as a means of helping students build connections between an arithmetic procedure and their existing conceptual knowledge. Elementary school children learned to add and subtract signed numbers through a computer-based multimedia program over 4 training sessions. Participants received 64 example problems presented only in symbolic form (single-representation [SR] group) or in symbolic, visual, and verbal forms (multiple-representation [MR] group). In Experiment 1, compared to the SR group, the MR group (a) showed a larger pretest-to-posttest gain for high-achieving students but not for low-achieving students, (b) showed a greater gain on difficult problems but not easy problems, (c) learned faster during training, and (d) showed a greater pretest-to-posttest reduction in the use of conceptual bugs reflecting conceptually confusion between negative signs and subtraction operators. In Experiment 2, high spatial ability students in the MR group outperformed low spatial ability students on pretest-to-posttest gain. Productive learning with MRs is strongest when working memory is not overloaded, so cognitive load and MR theories can be reconciled.     

Respecting Context to Protect Privacy: Why Meaning Matters

In February 2012, the Obama White House endorsed a Privacy Bill of Rights, comprising seven principles. The third, “Respect for Context,” is explained as the expectation that “companies will collect, use, and disclose personal data in ways that are consistent with the context in which consumers provide the data.” One can anticipate the contested interpretations of this principle as parties representing diverse interests vie to make theirs the authoritative one. In the paper I will discuss three possibilities and explain why each does not take us far beyond the status quo, which, regulators in the United States, Europe, and beyond have found problematic. I will argue that contextual integrity offers the best way forward for protecting privacy in a world where information increasingly mediates our significant activities and relationships. Although an important goal is to influence policy, this paper aims less to stipulate explicit rules than to present an underlying justificatory, or normative rationale. Along the way, it will review key ideas in the theory of contextual integrity, its differences from existing approaches, and its harmony with basic intuition about information sharing practices and norms.     

Why We Should Create Artificial Offspring: Meaning and the Collective Afterlife

This article argues that the creation of artificial offspring could make our lives more meaningful (i.e. satisfy more meaning-relevant conditions of value). By ‘artificial offspring’ I mean beings that we construct, with a mix of human and non-human-like qualities. Robotic artificial intelligences are paradigmatic examples of the form. There are two reasons for thinking that the creation of such beings could make our lives more meaningful and valuable. The first is that the existence of a collective afterlife—i.e. a set of human-like lives that continue after we die—is likely to be an important source and sustainer of meaning in our present lives (Scheffler in Death and the afterlife, OUP, Oxford, 2013). The second is that the creation of artificial offspring provides a plausible and potentially better pathway to a collective afterlife than the traditional biological pathway (i.e. there are reasons to favour this pathway and there are no good defeaters to trying it out). Both of these arguments are defended from a variety of objections and misunderstandings.     

Metaphoric comprehension: Studies in reminding and resembling

The theoretical problems posed by metaphoric comprehension are discussed in the context of experiments on prompted recall. Listeners heard sentences of the form “Topic is (like) Vehicle.” In most cases, a statement of the implicit resemblance (the “ground”) was very effective in prompting recall of its related metaphor. This result could not be attributed to the activation, transfer, or additive combination of pre-existing properties of the topic and vehicle terms or to pre-existing associations between grounds and sentence terms. It is argued that the vehicle domain guides a novel schematization of the topic domain, that the perceived resemblance is a higher-order relation among entities (both explicit and implicit) in each domain, and that this abstract relation constitutes the “functional memory unit.” Prompted recall may begin with recognition of this previously experienced relation.     

Why there is no error in the direct theory of perception

According to Gibson's direct theory, perception is an achievement, not a process. Perceptual error, therefore, is the failure to perceive. Taken in isolation, this assertion leads to implausible consequences, but taken together with other assertions of Gibson, it may be understood, without contradiction, to mean that there is no absolute error in perception. Whether perception is successful or not is determined by the context in which the perceptual act occurs.     

Technology and civil disobedience: Why engineers have a special duty to obey the law

Summary Engineers have a greater responsibility than many other professionals not to commit civil disobedience in performing their jobs as engineers. It does not follow that engineers have no responsibility for their company’s actions. Morally, engineer may be required to speak out within the company or even publicly against her company. An engineer may be required to work on a project or quit her job. None of these acts, generally, are against the law. An engineer may be morally required to commit civil disobedience as a private citizen. But, given the institutional character of engineering and the division of labor in the modern world, very rarely will conscience require an engineer to violate the law in the performance of her job as an engineer.     

The effects of redundant communications on listeners: Why different types may have different effects

Much of our communication is redundant in that we say more than necessary to be informative. How listeners respond to verbal redundancy is important because of its frequency of occurrence and because such knowledge should enable us to increase our understanding of the development of listening skills. Previous research indicated qualitative developmental differences in how listeners respond to differentiating redundancy (several distinguishing features of a referent are mentioned). The present research compared performance with two forms of redundancy: differentiating and structured (e.g., mentioning a distinguishing referential feature and a feature shared by several contiguous stimuli) and investigated causes of differences in responding to the two forms. First- and fifth-graders participated in a referential communication paradigm. Results were discussed in terms of a processing capacity model: Redundancy should facilitate performance only if it decreases processing demands on a listener. Which processing demands will be affected will depend on the specific redundancy and the specific task.I am indebted to the children and staff from Taken Elementary School in Smithtown, New York, and from Bedford, Campfield, and Westchester Elementary Schools and Pilgrim Christian Day School in Baltimore County, Maryland, for participating in this study. The first experiment was part of my doctoral dissertation at SUNY at Stony Brook. I am grateful to the members of my committee, especially Russ Whitehurst, for their guidance and advice. I also wish to thank Linda Baker for reading a preliminary draft of the paper, and Amy Gorback for running some of the subjects.     

Need for Meaning,Meaning Confusion,Meaning Anxiety,and Meaning Avoidance: Additional Dimensions of Meaning in Life

Two aspects of meaning in life have drawn much attention in previous research: presence of meaning and search for meaning. We proposed four additional aspects concerning individuals’ thoughts and feelings about meaning in life: need for meaning, meaning confusion, meaning avoidance, and meaning anxiety. We developed items to measure these dimensions. Exploratory and confirmatory factor analysis indicated that the data fit the factors well. Convergent and discriminant validities of the four dimensions were demonstrated though their distinct patterns of correlations with other variables, such as personality traits, need satisfaction, personal aspirations, life satisfaction, anxiety and depression. Moreover, cluster analysis revealed that individuals could be divided into meaningful groups according to these dimensions, with each group demonstrating unique psychological features. Implications for future studies on meaning in life are discussed.