The impact of context on pattern category learning and representation

Context traditionally has been regarded in vision research as a determinant for the interpretation of sensory information on the basis of previously acquired knowledge. Here we propose a novel, complementary perspective by showing that context also specifically affects visual category learning. In two experiments involving sets of Compound Gabor patterns we explored how context, as given by the stimulus set to be learned, affects the internal representation of pattern categories. In Experiment 1, we changed the (local) context of the individual signal classes by changing the configuration of the learning set. In Experiment 2, we varied the (global) context of a fixed class configuration by changing the degree of signal accentuation. Generalization performance was assessed in terms of the ability to recognize contrast-inverted versions of the learning patterns. Both contextual variations yielded distinct effects on learning and generalization thus indicating a change in internal category representation. Computer simulations suggest that the latter is related to changes in the set of attributes underlying the production rules of the categories. The implications of these findings for phenomena of contrast (in)variance in visual perception are discussed.     

Visual significance of pupillary response to an auditory task.

Subjects simultaneously performed visual and auditory detection tasks. Pupillary dilation accompanies increased cognitive load such as that caused by the auditory tasks. Errors in the visual task increased when the auditory task became more difficult. The increase was greater when the effects of pupillary dilation were blocked by an artificial pupil.     

Judging the plausibility of arguments in scientific texts: a student–scientist comparison

The ability to evaluate scientific claims and evidence is an important aspect of scientific literacy and requires various epistemic competences. Readers spontaneously validate presented information against their knowledge and beliefs but differ in their ability to strategically evaluate the soundness of informal arguments. The present research investigated how students of psychology, compared to scientists working in psychology, evaluate informal arguments. Using a think-aloud procedure, we identified the specific strategies students and scientists apply when judging the plausibility of arguments and classifying common argumentation fallacies. Results indicate that students, compared to scientists, have difficulties forming these judgements and base them on intuition and opinion rather than the internal consistency of arguments. Our findings are discussed using the mental model theory framework. Although introductory students validate scientific information against their knowledge and beliefs, their judgements are often erroneous, in part because their use of strategy is immature. Implications for systematic trainings of epistemic competences are discussed.     

Memory distortion and attitude change—Two routes to cognitive balance

We report novel research investigating memory distortion as an alternative route to cognitive balance, comparing it with attitude change as a well‐known balancing mechanism. Participants received statements from multiple communicators about a controversial topic (national pride in Study 1 and climate protection in Study 2) and remembered these statements immediately or 1 week later. This resulted in initially balanced or unbalanced combinations of the liking for individual communicators and the communicators' statements and in subsequent balance increases due to liking change or misremembering of statements. The contribution of memory distortion to balance was significant but weaker and less efficient than that of liking change, and the contributions were empirically independent (i.e., uncorrelated and differentially related to third variables—specifically, memory strength and individual cognitive consistency motivation). They also had a different temporal trajectory (liking change fast and memory distortion slow). We discuss theoretical and practical implications.     

Providing worked examples for learning multiple principles

Worked examples support learning. However, if they introduce easy-to-confuse concepts or principles, specific ways of providing worked examples may influence their effectiveness. Multiple worked examples can be introduced blocked (i.e., several for the same principle) or interleaved (i.e., switching between principles), and can be sequentially or simultaneously presented. Crossing these two factors provides four ways of presenting worked examples: blocked/sequential, interleaved/sequential, blocked/simultaneous, and interleaved/simultaneous. In an experiment with university students (N = 174), we investigated how these two factors influence the acquisition of procedural and conceptual knowledge about different, but closely related (thus, easy-to-confuse) stochastic principles. Additionally, we assessed the ability of students to discriminate between principles with verification tasks. Simultaneous presentation benefitted procedural knowledge whereas, interleaved presentation benefitted conceptual knowledge. No significant differences were found for verification tasks. The results suggest that it is worthwhile to adapt the presentation of the worked examples to the learning goals.     

Effects of Comparing Contrasting Cases on Learning From Subsequent Explanations

In an experiment, prior to processing instructional explanations N = 75 students received either (a) contrasting cases plus comparison prompts, (b) contrasting cases plus provided comparisons (i.e., model answers to the comparison prompts), or (c) no preparation intervention. We found that the learners with preparation intervention learned more and with a higher degree of efficiency, perceived less extraneous load, and experienced a higher feeling of smooth automatic running while they processed the explanations than the learners without a preparation intervention. These findings suggest that comparing contrasting cases serves a focusing function. Furthermore, we found that the learners in the provided comparisons condition acquired more conceptual knowledge from the explanations than the learners in the prompted comparisons condition. This result indicates that providing high amounts of instructional guidance while learners compare contrasting cases can have an added value in comparison to providing comparison prompts concerning the resulting preparation for future learning.     

Passing‐over: The Death of the Author in Hegel's Philosophy

Criticism of Hegel has been a central preoccupation of “postmodern” philosophy, from critical theory and deconstruction to Lacanian psychoanalytic theory and Foucauldian “archaeology.” One of the most frequent criticisms is that Hegel's invocation of “absolute knowledge” installs him in a position of authorial arrogance, of God‐like authority, leaving the reader in a position of subservience to the Sage's perfect wisdom. The argument of this article is that this sort of criticism is profoundly ironic, since Hegel's construction of the role of the Sage possessing absolute knowledge is in fact an elaborate mask covering over a radical project of disappearance of the author by which it becomes the reader who is left to author the text. The article explores Hegel's commitment to his own death as an author in his invention of a new method of demonstration, his epistemology, his philosophy of language, his theory of desire, and even in the seemingly least likely place of all, his portrait of “absolute knowledge.”     

The dental anxiety scale and effects of dental fear on salivary cortisol

Only a few studies have investigated use of the Dental Anxiety Scale in dental fear-induced neuroendocrine changes. The present study examined 19 female patients, each at two timepoints across an educational and a treatment session within periodontitis therapy. Subjective measures included a visual analogue scale, the STAI State scale, and the Dental Anxiety Scale. Salivary cortisol was measured in parallel across all four timepoints. Although patients were significantly more aroused and anxious prior to the treatment session, salivary cortisol remained unchanged. However, patients with high Dental Anxiety were significantly more aroused and anxious and showed significantly higher salivary cortisol during the educational session than those with low scores on Dental Anxiety. In conclusion, the Dental Anxiety Scale differentiated mean neuroendocrine change between patients scoring low and high for Dental Anxiety and its use as an accurate tool to identify patients with high dental anxiety should be further studied predictively.     

When different means bad or merely worse. How minimal and maximal goals affect ingroup projection and outgroup attitudes

Group members tend to perceive their ingroup relative to an outgroup as more prototypical for a common superordinate group because they project features of their ingroup onto the superordinate group. As a consequence, the ingroup is perceived as more positive than the outgroup (Mummendey & Wenzel, 1999). We extend the ingroup projection model by examining different types of ingroup goals: minimal and maximal goals as well as actual and ideal goals. Minimal goals should engender either‐or thinking and lead to more ingroup projection compared with maximal goals that should involve more nuanced thinking. Ingroup prototypicality in terms of ideal goals (e.g., what we ideally should strive for) was expected to show a stronger relation to outgroup attitudes than ingroup prototypicality in terms of actual goals (e.g., what we are actually striving for). We manipulated minimal and maximal goal orientation and assessed actual and ideal goals. Across two studies, relative ingroup prototypicality was higher in the minimal compared with the maximal goal condition. Moreover, ingroup prototypicality referring to ideal goals showed a stronger relation to outgroup evaluation than ingroup prototypicality referring to actual goals. Copyright © 2012 John Wiley & Sons, Ltd.     

Seeing the world with the eyes of the outgroup — The impact of perspective taking on the prototypicality of the ingroup relative to the outgroup

The positive effect of perspective taking on favorable attitudes towards stigmatized individuals and outgroups is well established (Batson et al., 1997). We draw on the ingroup projection model (Mummendey & Wenzel, 1999) to better understand the processes underlying this effect. Based on their egocentric perspective, ingroup and outgroup members have different representations of the superordinate group (perspective divergence) so that the ingroup is perceived as more relatively prototypical of the superordinate group, leading to negative outgroup evaluation. We hypothesize that the positive effect of perspective taking on outgroup attitudes is due to a reduction of relative ingroup prototypicality. Across three studies with different manipulations of perspective taking, we found that participants who were taking the perspective of an outgroup member evaluated the outgroup more positively and were less inclined to perceive their ingroup as more relatively prototypical. The effect of perspective taking on outgroup attitudes was mediated by relative ingroup prototypicality.