Perceptual versus postperceptual mediation of visual context effects: Evidence from the letter-superiority effect

Two experiments demonstrated letter-context effects that cannot easily be accounted for by post-perceptual theories based on structural redundancy, figural goodness, or memory advantage. In Experiment 1, subjects identified the color of a letter fragment more accurately in letter than in nonletter contexts. In Experiment 2, subjects identified the feature presented in a precued color more accurately in letters than in nonletters. We argue that these effects result from top-down perceptual processing.     

LES DIMENSIONS DE LA DETRESSE PSYCHOLOGIQUE: ANALYSE FACTORIELLE CONFIRMATOIRE DE TYPE HIERARCHIQUE*

The study of the hierarchical organization of psychological distress dimensions is plagued by numerous theoretical and methodological problems. The researcher must take into account the respective value of unidimensional and multidimensional conceptualizations and the complex debates between factor analysis experts. The main purpose of the present study is to demonstrate the construct validity of a hierarchical model of psychological distress. The sample consisted of 150 outpatients of the University of Montreal Psychology Clinic which completed the Psychiatric Symptoms Inventory. The results of first-order and second-order confirmatory factor analyses show the value of a hierarchical conceptualization of psychological distress. However, an examination of normalized residuals, total direct effects and modification indexes reveals the inadequacy of some items from the anxiety and cognitive problems subscales. The theoretical implications of these results are discussed.     

Is the concept of ‘personality’ relevant to the study of animal aggression?

Both theoretical considerations and methodological constraints explain why the experimental study of animal aggression does not often put much emphasis on individual differences and hardly uses the concept of ‘personality’. And yet, if neurobiologists consider those brain mechanisms that underlie the interpretation of a given situation and the anticipation of a method to cope with it, they are led to investigate mechanisms that underlie a number of behaviour dimensions which the psychologist would refer to as ‘personality’. The actual object considered in either case does not essentially differ. This is exemplified more concretely by examining the kind of factors—and the brain mechanisms involved in their very existence or in their processing—that contribute to determine the probability that in the face of a given situation, a given individual will adopt aggressive behaviour as the coping strategy.     

International perspectives in psychological research

The following two papers by (1) Bond and Sabourin and (2) d'Ydewalle and Denis were prepared for the World Social Science Report. They illustrate some of the current scope and diversity of the discipline.     

Cross-modal attentional deficits in processing tactile stimulation

In order to substantiate recent theorization on the possible links between the causes of the attentional blink and the psychological refractory period phenomena (e.g., Jolicoeur, 1999a), four experiments are reported in which two target stimuli, T₁ and T₂, were presented in different modalities at varying stimulus onset asynchronies (SOAs), with each stimulus being associated with a distinct task, Task₁ and Task₂. In Experiment 1, T₁ was a tone, and Task₁ was a speeded vocal response based on pitch. T₂ was a brief press applied to either of two distal fingerpads, and Task₂ was a speeded manual response based on tactile stimulus location. In Experiment 2, the same T₁ as that used in Experiment 1 was presented, and in Task₁ the subject either made a speeded vocal response based on pitch or ignored T₁. T₂ was a masked tactile stimulation, and Task₂ was an unspeeded manual discrimination of the tactile stimulation location. This Task₂ was maintained in Experiments 3 and 4. The auditory T₁ was replaced with a white digit embedded in a rapid serial visualization presentation of a stream of black letters, and in Task₁ the subject either made an unspeeded decision based on T₁ identity or ignored T₁. In all the experiments, the results showed an SOA-locked impairment in Task₂. As SOA was decreased, reaction times in the speeded Task₂ of Experiment 1 increased, and accuracy in the unspeeded Task₂ of Experiments 2–4 decreased. The SOA-locked impairment was almost eliminated when T₁ could be ignored or was absent. The results are discussed in terms of central processing limitations as the cause of such effects.     

Attention training toward and away from threat in social phobia: effects on subjective, behavioral, and physiological measures of anxiety

Social phobics exhibit an attentional bias for threat in probe detection and probe discrimination paradigms. Attention training programs, in which probes always replace nonthreatening cues, reduce attentional bias for threat and self-reported social anxiety. However, researchers have seldom included behavioral measures of anxiety reduction, and have never taken physiological measures of anxiety reduction. In the present study, we trained individuals with generalized social phobia (n = 57) to attend to threat cues (attend to threat), to attend to positive cues (attend to positive), or to alternately attend to both (control condition). We assessed not only self-reported social anxiety, but also behavioral and physiological measures of social anxiety. Participants trained to attend to nonthreatening cues demonstrated significantly greater reductions in self-reported, behavioral, and physiological measures of anxiety than did participants from the attend to threat and control conditions.     

On Ignorance: A Vindication of the Standard View

Rik Peels has once again forcefully argued that ignorance is not equivalent to the lack or absence of knowledge. In doing so, he endeavors to refute the Standard View of Ignorance according to which they are equivalent, and to advance what he calls the “New View” according to which ignorance is equivalent (merely) to the lack or absence of true belief. I defend the Standard View against his new attempted refutation.     

Power and Legitimizing Ideologies in Hierarchy‐Enhancing vs. Hierarchy‐Attenuating Environments

According to social dominance theory, intergroup dynamics are strongly influenced by the social positions which individuals hold in society. Several studies suggest that holding a position of power can, sometimes automatically, generate negative attitudes and hostile behaviors toward subordinate social groups. However, at present, the studies carried out on these effects of power have not taken into account the influence of the normative context. Based on the distinction made by Sidanius and Pratto between “hierarchy‐enhancing” (HE) vs. “hierarchy‐attenuating” (HA) environments, this study examines if the effects of power on legitimizing cognitions vary as a function of the normative environment. A laboratory study and a study conducted in a natural environment confirm our hypothesis that individuals holding a powerful or dominant social role in a HE setting differ significantly from individuals holding an equally powerful role in a HA setting. The effects of power observed in past research probably resulted from studying power in hierarchy‐enhancing environments, but not in hierarchy‐attenuating ones.