When do irrelevant visual stimuli impair processing of identical targets?

Three experiments investigated whether the repeated-letter inferiority effect (RLIE) and repetition blindness (RB) are identical phenomena or not and how the RLIE can be reconciled with the flanker compatibility effect (FCE). Participants reported a masked target and ignored an unmasked distractor. We manipulated the type of distractor (identical, alternative target, or neutral), the order of presenting distractor and target, and the predictability of target location. When distractors preceded the targets, distractors identical to the target always caused deficits in target processing (i.e., RB). With simultaneous presentation, identical distractors caused deficits (i.e., an RLIE) for unpredictable target locations only. Yet the RLIE was significantly smaller than RB. This result suggests that simultaneously presented stimuli are identified serially, in random order, if target position is unpredictable. As a result, RB arises only in the 50% of all trials with identical distractors in which the distractor is identified before the target. With simultaneous presentation and predictable target location, however, parallel processing of targets and distractors was possible that gave rise to an FCE in recognition accuracy. Analyses of false alarm rates revealed no evidence of significant response biases.     

To reverse or not to reverse: when is an ambiguous figure not ambiguous?

The role of bottom-up processes in our perception of reversible figures was examined. In Experiment 1 the overlapping squares figure and nonsense reversible figures were used. The effects of adapting subjects for differing durations to an unambiguous version of the figure before presentation of the traditional reversible figure were determined under conditions of varying precision of fixation. In Experiment 2 the research was expanded to other examples of reversible figures. In both experiments, results with two dependent measures (the subject's first percept and the number of reversals reported) were generally consistent with the interpretation of bottom-up processes underlying the adaptation effects. However, the crucial role of stimulus and procedural variables and the differential sensitivity of the two dependent measures was demonstrated.     

Temporary suppression of visual processing in an RSVP task: an attentional blink? .

Through rapid serial visual presentation (RSVP), we asked Ss to identify a partially specified letter (target) and then to detect the presence or absence of a fully specified letter (probe). Whereas targets are accurately identified, probes are poorly detected when they are presented during a 270-ms interval beginning 180 ms after the target. Probes presented immediately after the target or later in the RSVP stream are accurately detected. This temporary reduction in probe detection was not found in conditions in which a brief blank interval followed the target or Ss were not required to identify the target. The data suggest that the presentation of stimuli after the target but before target-identification processes are complete produces interference at a letter-recognition stage. This interference may cause the temporary suppression of visual attention mechanisms observed in the present study.     

Why do alternative ways of responding improve children's performance on tests of strategic reasoning?

Changing the way in which children respond significantly improves performance across a variety of cognitive domains. However, the basis for this response‐mode effect is unknown. To address this issue, the current study tested 78 preschool children on a measure of executive functioning (the windows task: Hala & Russell, 2001 ). The task requires children to point to an empty box to receive a box with a treat in it. There were four versions of the task, differing only in the way in which children made their responses. Children in the baseline condition, who pointed with their finger, performed poorly. However, children in three alternative response‐mode conditions won the treat significantly more often. Strikingly, even children who pretended to be pointing with an arrow – but were in reality pointing with their finger – performed significantly better than baseline. We suggest that non‐standard response modes encourage children to reflect on their actions and that this reduces the number of unreflective errors they make. The findings demonstrate that response‐mode effects do not depend on the presence of a physical means of responding (such as an arrow), but can be achieved via a purely cognitive means (such as engaging in pretence).     

Relations between implicit measures of prejudice:what are we measuring?

Some recent findings suggest that different implicit measures of prejudice assess the same underlying construct, but other work suggests that they may not. In this experiment, White participants completed a version of a priming measure of racial attitudes that either encouraged categorization of the face primes in terms of race or did not encourage such categorization, and then completed the Implicit Association Test. Correspondence between the two measures was found only when categorization by race was required on the priming measure. Moreover, participants appeared more prejudiced when they were led to construe individuals in terms of race than when they were not so encouraged. The discussion focuses on the potential for dissociations between evaluations of a category and evaluations of members of the category.     

Does prior knowledge facilitate the detection of visual targets in random noise?

The detectability of forms embedded within random visual noise has been found to be predictable from the autocorrelation transform of the stimulus pattern (Uttal, 1975). A basic assumption in the autocorrelation theory of form detection is that detectability is determined by the organization of the stimulus pattern, irrespective of the observer’s prior knowledge or expectations about the characteristics of the form. This assumption was tested by determining the effect of the size of the set of alternative target forms on performance of a forced-choice detection task. The targets were composed of dots in a straight line, appearing in one of a specified set of 2, 4, or 8 alternative positions in a pattern of randomly distributed masking dots. Detection accuracy was found to decrease as set size increased, but this decrease was close to what was predicted on the assumption that the random background was independently confusable with the target at each of the alternative positions. Thus, prior knowledge of the set of alternative targets appeared to have no effect on thevisual process, but only on thedecision process by virtue of the features that were relevant criteria for deciding which of the two patterns on each trial was most likely to contain the target. This result is consistent with the autocorrelation theory. This experiment may illustrate how the decision process has influenced the performance in many other experiments that have been assumed to demonstrate an effect of prior knowledge on perception.     

Casuistry: an alternative or complement to principles?

Casuistry is a traditional method of interpreting and resolving moral problems. It focuses on the circumstances of particular cases rather than on the application of ethical theories and principles. After a brief history of casuistry, the method is explained and its relation to theory and principles is discussed.     

The skill of seeing: beyond the sensorimotor account?

How crucial a role do reason, memory and planning play alongside lower-level sensorimotor skills in our visual activity? Andy Clark has recently proposed a new skill-based account of seeing. This suggests there is more to perception than only the mastery of sensorimotor contingencies, as O'Regan, No? and others have stressed in recent influential papers.     

Lexical processing of ambiguous words: dominance or associative strength?

Four experiments examined the role of meaning frequency (dominance) and associative strength (measured by associative norms) in the processing of ambiguous words in isolation. Participants made lexical decisions to targets words that were associates of the more frequent (dominant) or less frequent (subordinate) meaning of a homograph prime. The first two experiments investigated the role of associative strength at long SOAs (Stimulus Onset Asynchrony) (750 ms.), showing that meaning is facilitated by the targets' associative strength and not by their dominance. The last two experiments traced the role associative strength at short SOAs (250 ms), showing that the manipulation of the associative strength has no effect in the semantic priming. The conclusions are: on the one hand, semantic priming for homographs is due to associative strength manipulations at long SOAs. On the other hand, the manipulation of the associative strength has no effect when automatic processes (short SOAs) are engaged for homographs.     

Out of sight,out of mind? Relations between visual acuity and cognition

Prior research has established significant relations between measures of sensory ability and cognitive function in adults of different ages, and several explanations for this relation have been proposed. One explanation is that sensory abilities restrict cognitive processing, a second is that cognitive abilities influence assessments of sensory ability, and a third is that both sensory function and cognition are affected by a common, potentially age-based, third factor. These explanations were investigated using mediation and moderation analyses, with near visual acuity as the sensory measure and scores on visual speed tests and auditory memory tests as the cognitive measures. Measures of visual acuity, speed, and memory were obtained from three moderately large samples, two cross-sectional (N?=?380, N?=?4,779) and one longitudinal (N?=?2,258), with participants ranging from 18 to 90 years of age. The visual acuity and cognitive measures had different age trajectories, and the visual acuity–cognition relations were similar in each 5-year age band. The results suggest that the age-related differences and changes in near visual acuity are unlikely to contribute to the age-related differences and changes in speed and memory measures.     

Developing ways to encourage early detection and presentation of oral cancer: what do high-risk individuals think?

The aim of this pilot research was to improve understanding of individuals at risk of oral cancer, to determine their attitudes towards and responses to early detection interventions. In-depth interviews with the target group (n = 25) were used to determine their views, attitudes and requirements for an intervention to encourage early detection of oral cancer. This data was used in combination with theory-based constructs to develop written material that aimed to increase awareness of oral cancer, encourage mouth self-examination (MSE) and early presentation. A second pilot study used a think-aloud protocol to assess the target groups' (n = 14) reactions to the written information. In both studies the tape-recorded responses were analysed using framework analysis. The target group had limited knowledge about oral cancer, particularly the signs and symptoms. Participants saw benefits in performing MSE but noted the main barriers were not knowing what signs to look for or where to look. The written information was generally well-received but required some modifications. In particular, the target group required further persuasion that their lifestyle contributed to an increased risk of oral cancer. The results of these pilot studies have informed the development of a theory-based intervention for the early detection of oral cancer.     

Mirror-reflecting a picture of an object: what happens to the shape percept?

Although a two-dimensional picture never fully specifies the actual layout of the depicted three-dimensional scene, one is still able to make a three-dimensional interpretation. When a picture is mirror-reflected, the range of plausible scenes possibly corresponding with the depicted scene has not changed with respect to the original depiction. We were curious to find out whether the inherent picture ambiguities would be solved the same way or differently. Participants performed local attitude settings on three sets of pictures: (1) original pictures, (2) left-right mirrored pictures, and (3) up-down mirrored pictures. Pairwise comparison of the pictorial reliefs of the depicted object, reconstructed from the raw settings, revealed dissimilarities. The differences, however, could be drastically diminished by conducting an affine transformation correction taking into account not only the depths, but also the picture plane coordinates. The inherent ambiguities seemed thus to be solved differently between conditions. By factoring out different solutions to the ambiguities, the pictorial reliefs were found to be equivalent.     

Aggression and psychological problems in juvenile male delinquents versus controls in russia: Alternative ways of “letting off steam”?

The purpose of this study is to investigate possible relationships between various subtraits of aggression and psychological symptoms in a sample of male delinquents. One hundred eighty-nine subjects from a juvenile correction center for delinquent adolescents and 117 control subjects from secondary schools in Arkhangelsk, Russia, were assessed by means of the Aggression Questionnaire and the Youth Self-Report. Significant correlations between hostility, anger, and some psychological problems (e.g., Withdrawn, Anxious/Depressed, Thought Problems) were found in both groups. At the same time, physical and verbal aggression was almost exclusively related to aggressive and delinquent behavior. The findings lend support to our proposed interactional model in which excitation, as a result of the interplay between cognitions and emotions, could be expressed either as socially accepted behavior, aggressive behavior, or psychological and somatic symptoms.     

Emotional intelligence as an aspect of general intelligence: what would David Wechsler say?

R. D. Roberts, M. Zeidner, and G. Matthews (2001) have carefully examined the controversial issue of whether emotional intelligence (EI) should be classified as an intelligence and whether EI's constructs meet the same psychometric standards as general intelligence's constructs. This article casts their efforts into the framework of both historical and modern IQ-testing theory and research. It details David Wechsler's attempts to integrate EI into his tests and how his conception of a good clinician would be that of an emotionally intelligent clinician. Current theories and research on IQ also have a role in EI beyond what Roberts et al. described, including J. L. Horn's (1989) expanded model and A. R. Luria's (1966) neuropsychological research, and better criteria than the Armed Services Vocational Aptitude Battery should be used in future EI studies. The authors look forward to more research being conducted on EI, particularly in future performance-based assessments.     

Intuition and the socratic method: Two opposed ways of knowing?

Socratic method and intuition are two ways of knowing commonly thought as opposed. The author shows how both ways of knowing can be linked in an education that has philosophy as its armature.     

Processing alternative explanations of behavior: correction or integration?

Three experiments investigated how activation of knowledge about situational forces affects discounting in dispositional inference tasks. Each experiment varied a different knowledge activation factor--salience, accessibility, or specificity of situational information. In addition, all 3 experiments varied situational demands and cognitive load. The results showed that cognitive load eliminated discounting when situational information was low in salience, accessibility, or specificity. However, when situational information was more salient, accessible, or specific, it produced strong discounting effects even when perceivers were under cognitive load. These results are discussed in terms of correction and integration models of dispositional inferences from behavior.     

Salience-controlled visual search: Are the brightest and the least bright targets found by different processes?

It has been proposed that maximum and minimum targets (like the brightest or the least-bright item of a sample) are found by different search processes, the latter but not the former being sensitive to the withdrawal of focal attention. The present study could not establish such a systematic difference and suggests that variations in search performance are due to variations in target salience. Bright targets among dim distractors were generally more salient than dim targets among bright dis-tractors (Experiment 1). In both conditions, search performance was deteriorated when attention was withdrawn (Experiment 2). Performance became identical when maximum and minimum targets were matched in salience; this was also confirmed for dark items on bright background (Experiment 3). The data underline the importance of salience in visual search but do not support the assumption that maximum and minimum target searches are qualitatively different in their demands on focal attention. Salience and attention rather seem to resemble complementary functions in visual search; the less salient a target is the more attention is required to detect it.     

Memory for goal-directed sequences of actions: Is doing better than seeing?

Verb-object phrases are usually remembered better if they have been enacted during study than if theyhave been learned verbally or if one has observed another person enact the phrases. Researchers have explained this well-established enactment effect by assuming that enactment leaves an additional motor code enhancing memory. We assume instead that enactment provokes excellentitem-specific processing at t he expense of processing relations between items. Thus, if recall were to depend on this relational processing that is hindered by enactment, enactment should not be a more effective encoding strategy than observation. We tested this hypothesis by analyzing the recall of sequences of related actions. In two experiments, we found no recall advantage of enactment over observing another person perform, though both encoding tasks were superior to verbal learning. Organization was best after observation. These findings imply that learning by viewing is not inferior to learning by doing.