Perceptual Categorization: Connectionist Modelling and Decision Rules

Although it is currently popular to model human associative learning using connectionist networks, the mechanism by which their output activations are converted to probabilities of response has received relatively little attention. Several possible models of this decision process are considered here, including a simple ratio rule, a simple difference rule, their exponential versions, and a winner-take-all network. Two categorization experiments that attempt to dissociate these models are reported. Analogues of the experiments were presented to a single-layer, feed-forward, delta-rule network. Only the exponential ratio rule and the winner-take-all architecture, acting on the networks' output activations that corresponded to responses available on test, were capable of fully predicting the mean response results. In addition, unlike the exponential ratio rule, the winner-take-all model has the potential to predict latencies. Further studies will be required to determine whether latencies produced under more stringent conditions conform to the model's predictions.     

Narrative and Metaphysical Ambition: On Being “in Christ”

This article addresses some of the confusion regarding the role of metaphysical claims in narrative theology. Proponents and critics of narrative theology alike wonder at the ambiguous place of metaphysical speech about God as an objective reality. This essay enters the conversation through the side door of soteriology. Rather than focusing on the relationship between narrative and metaphysics or narrative and analogy or narrative and first‐order theological claims, I examine what sort of metaphysical statements are required to make the Christian claim that human beings are “in Christ” intelligible as a soteriological reality. I argue that the Christian grammar itself assumes a Christology with a certain kind of metaphysical ambition without which Christianity lapses into incoherence. To make this case, I show that David Kelsey's “narrative identity” Christology in Eccentric Existence lacks the metaphysical statements necessary to uphold his conviction that human beings are “in Christ.” A comparison with T. F. Torrance and the Book of Hebrews reveals that when narrative circumvents metaphysical statements about the incarnate Son, soteriological claims lack coherence and the biblical narrative itself is distorted by a false metaphysic. Thus, metaphysical claims internal to the narrative of Jesus are necessary to tell the story of God faithfully. In this way, narrative is the expression of a theological metaphysics.     

“To hope was to expect”: The impact of perspective taking and forecast type on wishful thinking

When forecasting future outcomes, people tend to believe that the outcomes they want to happen are also likely to happen. Despite numerous attempts, few systematic factors have been identified that consistently and robustly reduce wishful thinking (WT) effects. Using elections and sporting event outcomes as contexts, three experiments examined whether taking the perspective of a political rival or opposing fan reduced WT effects. We also examined whether making deliberative (vs. intuitive-based) forecasts was associated with lower WT effects. Online adult samples of U.S. citizens from Mechanical Turk and U.S. college students provided their preferences and forecasts for the U.S. presidential election (Experiments 1 and 2) and a sports competition outcome (Experiment 3). Critically, some participants received perspective taking prompts immediately before providing forecasts. First, results revealed reductions in WT effects when participants engaged in perspective taking. Interestingly, this effect only emerged when intuitive-based forecasts were made first (Experiment 3). Second, intuitive-based forecasts revealed stronger evidence of WT effects. Finally, we found that perspective taking and forming forecasts deliberately promoted a shift in focus away from preferences and toward a consideration of the relative strengths and weaknesses of the entities (i.e., candidates and teams). Theoretical implications for understanding WT effects and applied implications for developing interventions are discussed.