Are summary statistics enough? Evidence for the importance of shape in guiding visual search

Peripheral vision outside the focus of attention may rely on summary statistics. We used a gaze-contingent paradigm to directly test this assumption by asking whether search performance differed between targets and statistically-matched visualizations of the same targets. Four-object search displays included one statistically-matched object that was replaced by an unaltered version of the object during the first eye movement. Targets were designated by previews, which were never altered. Two types of statistically-matched objects were tested: One that maintained global shape and one that did not. Differences in guidance were found between targets and statistically-matched objects when shape was not preserved, suggesting that they were not informationally equivalent. Responses were also slower after target fixation when shape was not preserved, suggesting an extrafoveal processing of the target that again used shape information. We conclude that summary statistics must include some global shape information to approximate the peripheral information used during search.     

With a Sword Pointing to the East,West, South,and North

In his In Defense of War, Nigel Biggar argues for an account of war based in Christian love. In the process, he opposes Christian pacifists, the British Left, liberal accounts of just‐war, and accounts of just‐war based on self‐defense. Although framed in terms of love, his account pivots around punishment, which is further explicated by a thorough review of the recent war in Iraq, the invasion of which he deems justified. This review compares Biggar's monograph to prior iterations of a love‐based approach to just war by Paul Ramsey and Oliver O'Donovan. Biggar's contributions regarding love, punishment, and policy analysis are recognized, as well as his attempt to carry on the tradition of the ‘mournful warrior’. As a model for the kind of scrutiny that Christian ethicists should bring to bear on serious social issues, Biggar's monograph is excellent. However, the political stance and – largely implicit and unstated – political theology operating behind this book are, in the end, disconcerting.     

Changing the Paradigm for Engineering Ethics

Modern philosophy recognizes two major ethical theories: deontology, which encourages adherence to rules and fulfillment of duties or obligations; and consequentialism, which evaluates morally significant actions strictly on the basis of their actual or anticipated outcomes. Both involve the systematic application of universal abstract principles, reflecting the culturally dominant paradigm of technical rationality. Professional societies promulgate codes of ethics with which engineers are expected to comply (deontology), while courts and the public generally assign liability to engineers primarily in accordance with the results of their work, whether intended or unintended (consequentialism). A third option, prominent in ancient philosophy, has reemerged recently: virtue ethics, which recognizes that sensitivity to context and practical judgment are indispensable in particular concrete situations, and therefore rightly focuses on the person who acts, rather than the action itself. Beneficial character traits—i.e., virtues—are identified within a specific social practice in light of the internal goods that are unique to it. This paper proposes a comprehensive framework for implementing virtue ethics within engineering.     

Response-specific slowing in older age revealed through differential stimulus and response effects on P300 latency and reaction time

Older age produces numerous changes in cognitive processes, including slowing in the rate of mental processing speed. There has been controversy over the past three decades about whether this slowing is generalized or process-specific. A growing literature indicates that it is process-specific and suggests it is most dramatic at the interface where a stimulus input is translated into a response output. We tested this hypothesis using a task in which young and older adult males made either compatible or incompatible responses to the word LEFT or RIGHT shown briefly and variously located in a 4 row × 6 column matrix surrounded by # signs or by letters chosen randomly from the sets A-G or A-Z. Processing speed was measured using P300 latency and reaction time. Experimental effects on these two measures provided support for the hypothesis in revealing that stimulus identification processes were preserved, whereas processes related to translating a stimulus input into a designated response output and then selecting that response were compromised in the elderly.     

Human melody singing by bullfinches (Pyrrhula pyrrula) gives hints about a cognitive note sequence processing

We studied human melody perception and production in a songbird in the light of current concepts from the cognitive neuroscience of music. Bullfinches are the species best known for learning melodies from human teachers. The study is based on the historical data of 15 bullfinches, raised by 3 different human tutors and studied later by Jürgen Nicolai (JN) in the period 1967–1975. These hand-raised bullfinches learned human folk melodies (sequences of 20–50 notes) accurately. The tutoring was interactive and variable, starting before fledging and JN continued it later throughout the birds’ lives. All 15 bullfinches learned to sing alternately melody modules with JN (alternate singing). We focus on the aspects of note sequencing and timing studying song variability when singing the learned melody alone and the accuracy of listening-singing interactions during alternatively singing with JN by analyzing song recordings of 5 different males. The following results were obtained as follows: (1) Sequencing: The note sequence variability when singing alone suggests that the bullfinches retrieve the note sequence from the memory as different sets of note groups (=modules), as chunks (sensu Miller in Psychol Rev 63:81–87, 1956). (2) Auditory–motor interactions, the coupling of listening and singing the human melody: Alternate singing provides insights into the bird’s brain melody processing from listening to the actually whistled part of the human melody by JN to the bird’s own accurately singing the consecutive parts. We document how variable and correctly bullfinches and JN alternated in their singing the note sequences. Alternate singing demonstrates that melody-singing bullfinches did not only follow attentively the just whistled note contribution of the human by auditory feedback, but also could synchronously anticipate singing the consecutive part of the learned melody. These data suggest that both listening and singing may depend on a single learned human melody representation (=coupling between perception and production).     

University Students’ Perceptions of Academic Cheating: Triangulating Quantitative and Qualitative Findings

Using a parallel mixed-methods design, the current study examined university students’ perceptions of academic cheating through collecting and analyzing both the quantitative and qualitative data. Our quantitative findings corroborate previous research that male students have engaged more in academic cheating than females based on students’ self-reports, and that undergraduate students are less willing to discuss issues on academic cheating as compared with their graduate counterparts. Five themes emerged from the thematic analysis of the qualitative data: (1) flexible definitions for cheating, (2) environmental promotion of cheating, (3) the moral transgression of cheating, (4) cheating as an ambiguous justification, and (5) cheating as a conscious decision making process. The mixed-methods findings indicate that there is no relationship between students’ gender or classification and their endorsements of the qualitative themes. However, non-White students are more likely to endorse the theme “cheating as an ambiguous justification.” Implications for reducing and preventing academic cheating at the university level are discussed.     

Content and process priming: A review

The last forty years of social science research have produced over 12,000 articles on priming. The range, complexity, and novelty of priming effects are hard to comprehend, let alone explain, using a single model or perspective. In this review, we discuss content priming and process priming effects. We then propose an integrative model that can account for the combined results.