Semantic neighborhood effects on the recognition of ambiguous words

The effect of semantic neighborhood on the processing of ambiguous words was examined in two lexical decision experiments. Semantic neighborhood was defined in terms of semantic set size and network connectivity. In Experiment 1, the variables of semantic set size, network connectivity, and ambiguity were crossed. An ambiguity advantage was observed only within small-set low-connectivity words. In Experiment 2, the effect of network connectivity on the processing of words of high and low meaning relatedness was examined. Participants responded more rapidly to words of high meaning relatedness, relative to words of low meaning relatedness, but only within high-connectivity words. These results are interpreted within a framework in which both semantic feedback processes and meaning-level competition can affect the recognition of semantically ambiguous words.     

Evaluating the contributions of task expectancy in the testing and guessing benefits on recognition memory

Recently, we have shown that two types of initial testing (recall of a list or guessing of critical items repeated over 12 study/test cycles) improved final recognition of related and unrelated word lists relative to restudy. These benefits were eliminated, however, when test instructions were manipulated within subjects and presented after study of each list, procedures designed to minimise expectancy of a specific type of upcoming test [Huff, Balota, & Hutchison, 2016. The costs and benefits of testing and guessing on recognition memory. Journal of Experimental Psychology: Learning, Memory, and Cognition, 42, 1559–1572. doi:10.1037/xlm0000269], suggesting that testing and guessing effects may be influenced by encoding strategies specific for the type of upcoming task. We follow-up these experiments by examining test-expectancy processes in guessing and testing. Testing and guessing benefits over restudy were not found when test instructions were presented either after (Experiment 1) or before (Experiment 2) a single study/task cycle was completed, nor were benefits found when instructions were presented before study/task cycles and the task was repeated three times (Experiment 3). Testing and guessing benefits emerged only when instructions were presented before a study/task cycle and the task was repeated six times (Experiments 4A and 4B). These experiments demonstrate that initial testing and guessing can produce memory benefits in recognition, but only following substantial task repetitions which likely promote task-expectancy processes.     

Picture object recognition in an American black bear (<Emphasis Type="Italic">Ursus americanus</Emphasis>)

Many animals have been tested for conceptual discriminations using two-dimensional images as stimuli, and many of these species appear to transfer knowledge from 2D images to analogous real life objects. We tested an American black bear for picture-object recognition using a two alternative forced choice task. She was presented with four unique sets of objects and corresponding pictures. The bear showed generalization from both objects to pictures and pictures to objects; however, her transfer was superior when transferring from real objects to pictures, suggesting that bears can recognize visual features from real objects within photographic images during discriminations.     

Three arguments for humility

Ramseyan humility is the thesis that we cannot know which properties realize the roles specified by the laws of completed physics. Lewis seems to offer a sceptical argument for this conclusion. Humean fundamental properties can be permuted as to their causal roles and distribution throughout spacetime, yielding alternative possible worlds with the same fundamental structure as actuality, but at which the totality of available evidence is the same. On the assumption that empirical knowledge requires evidence, we cannot know which of these worlds is actual. However, Lewis also appeals to a range of familiar semantic principles when framing his argument, which leads some authors to suppose that he can also plausibly be interpreted as offering a purely semantic argument for humility in addition. In this paper I grant that these arguments are Lewisian, but argue that Lewis is also committed to a theory of mind that licenses a purely metaphysical argument for humility based on the idea that mental properties supervene on fundamental structure. Given that knowing which x is the F requires knowing that a is the F, the supposition that we could come to know which properties actually occupy the fundamental roles entails differences in mental properties between worlds with the same fundamental structure, violating supervenience. Humility follows right away, without any further epistemic or semantic principles. This argument is immune to almost every way of rebutting the sceptical and semantic arguments; conversely, almost every way of rebutting the metaphysical argument tells equally against the others.     

The role of attentional networks in voluntary task switching

Coordination of task choice and performance in multitask environments likely involves attentional processes. Subjects completed the Attention Network Test (ANT) and a voluntary task-switching procedure. Task choice, but not task performance, was correlated with the executive score from the ANT, with higher switch probabilities for subjects with more efficient executive control networks. Task performance was correlated with the alerting score, with larger response time switch costs for subjects with larger alerting scores. The dissociation of task choice and task performance measures in terms of the pattern of correlations with attentional networks suggests that these two measures may reflect different cognitive processes engaged in voluntary task switching.     

Neural Synchrony and the Causal Efficacy of Consciousness

The purpose of this paper is to address a well-known dilemma for physicalism. If mental properties are type identical to physical properties, then their causal efficacy is secure, but at the cost of ruling out mentality in creatures very different to ourselves. On the other hand, if mental properties are multiply realizable, then all kinds of creatures can instantiate them, but then they seem to be causally redundant. The causal exclusion problem depends on the widely held principle that realized properties inherit their causal powers from their realizers. While this principle holds for functional realization, it fails on a broader notion of realization that permits the realization of complex qualitative properties such as spatial and temporal patterns. Such properties are best seen as dependent powerful qualities, which have their causal roles in virtue of being the qualities they are, and do not inherit powers from their realizers. Recent studies have identified one such property—neural synchrony—as a correlate of consciousness. If synchrony is also partially constitutive of consciousness, then phenomenal properties are both multiply realizable and causally novel. I outline a version of representationalism about consciousness on which this constitution claim holds.

     

Sunk Cost Effects: The Influences of Instruction and Future Return Estimates

Normative principles imply that decision makers′ choices should be affected solely by the prospective future consequences of the options. Previous work, however, has demonstrated the occurrence of sunk cost effects, whereby decision makers are reluctant to abandon options in which they have made prior investments. The present research shows that, contrary to earlier findings, there exist conditions under which sunk cost effects are reduced significantly by instruction in pertinent economic principles. Additional findings indicate that sunk cost effects are mitigated by an important factor that is often present in real-world decision situations but omitted in most sunk cost research paradigms-explicit estimates of the future returns the given options might yield. Theoretical and practical implications are developed and discussed, including possibly common ambiguities about what normative sunk costs principles imply and how they should be applied.     

Attributions about the causes and consequences of cataclysmic events

Abstract

Basic to the study of disasters and other life crises are questions about how victims and observers make sense of the event. Attribution theory, which describes how and why people ascribe causes to events and behaviors, can provide a useful framework for helping researchers in their quest to understand how and why victims and observers respond as they do to cataclysmic events. In spite of its clear potential for guiding research, surprisingly few studies looking at disaster and nearly no studies of terrorism have used an attributional perspective. While other negative life crises have been studied, cataclysmic events such as disasters and terrorist attacks possess distinctive features that set them apart from other types of trauma. Because of differences in degree of consensus, perceived control, and intentionality, cataclysmic events offer attribution researchers a unique arena in which to test and clarify basic assumptions. This article reveiws the work done in the field and outlines areas of concern for future efforts.     

Ethnic Differences in the Developmental Significance of Parentification

Using an ecological framework, this 2‐wave longitudinal study examined the effects of parentification on youth adjustment across the transition to adolescence in a high‐risk, low‐income sample of African American (58%) and European American (42%) mother–child dyads (T1 M_age = 10.17 years, T2 M_age = 14.89 years; 52.4% female). Children's provision of family caregiving was moderately stable from early to late adolescence. Emotional and instrumental parentification evidenced distinct long‐term effects on adolescents' psychopathology and the quality of the parent–child relationship. Ethnicity moderated these relations. Emotional and instrumental parentification behaviors were associated with predominantly negative outcomes among European American youth in the form of increased externalizing behavior problems and decreased parent–child relationship quality, whereas emotional parentification was associated with positive outcomes among African American youth in the form of increased parent–child relationship quality, and instrumental parentification was neutral. These findings support a multidimensional view of parentification as a set of culturally embedded phenomena whose effects can only be understood in consideration of the context in which they occur.