Right-sided human prefrontal brain activation during acquisition of conditioned fear

This H2(15)O positron emission tomography (PET) study reports on relative regional cerebral blood flow (rCBF) alterations during fear conditioning in humans. In the PET scanner, subjects viewed a TV screen with either visual white noise or snake videotapes displayed alone, then with electric shocks, followed by final presentations of white noise and snakes. Autonomic nervous system responses confirmed fear conditioning only to snakes. To reveal neural activation during acquisition, while equating sensory stimulation, scans during snakes with shocks and white noise alone were contrasted against white noise with shocks and snakes alone. During acquisition, rCBF increased in the right medial frontal gyrus, supporting a role for the prefrontal cortex in fear conditioning to unmasked evolutionary fear-relevant stimuli.     

Development and validation of the Cognitive Telephone Screening Instrument (COGTEL) for the assessment of cognitive function across adulthood

The authors introduce a screening instrument that assesses cognitive-function domains across adulthood over the telephone. The authors administered the Cognitive Telephone Screening Instrument (COGTEL) to 81 younger adults (M = 25.6 years) and 83 older adults (M = 66.9 years). Each participant completed the COGTEL twice, once over the telephone and once in a face-to-face assessment. The authors (a) analyzed the degree of agreement between face-to-face and telephone COGTEL scores, (b) developed a COGTEL Total score that reflects global cognitive functioning, and (c) examined concurrent validity. The method of administration did not largely influence mean levels, rank orders, or factor structure as revealed by confirmatory factor analysis. Moreover, age differences were not modulated by the form of administration. The distribution of COGTEL Total scores followed a Gaussian function, which prevents COGTEL from being limited by ceiling effects. The results provide evidence for the validity and reliability of the COGTEL to assess cognitive functioning in large-scale epidemiological studies, longitudinal studies, and clinical follow-up among healthy adults.     

Application of the rubber hand illusion paradigm: comparison between upper and lower limbs

The “rubber hand illusion (RHI)” is a perceptual illusion, which allows the integration of artificial limbs into the body representation of a person by means of combined visual and tactile stimulation. The illusion has been frequently replicated but always concerning the upper limbs. The present study verified an analog illusion that can be called the “rubber foot illusion” (RFI). In a conjoint experiment using both a rubber hand and a rubber foot, brushstrokes were applied to the respective real and rubber limb placed alongside the real one. However, only the artificial limb’s handling was visible. The brushstrokes were given either synchronously, with a delay of ±0.5 s, or without tactile stimulation of the real limb. Questionnaire data and the proprioceptive drift towards the rubber limb (determined by calling on the subjects to show where they locate their unseen limb) defined the illusion strength. Results revealed that the illusion was induced in both limbs with comparable strength, but only in the synchronous condition.     

The Flushtration Count Illusion: Attribute substitution tricks our interpretation of a simple visual event sequence

When faced with a difficult question, people sometimes work out an answer to a related, easier question without realizing that a substitution has taken place (e.g., Kahneman, 2011, Thinking, fast and slow. New York, Farrar, Strauss, Giroux). In two experiments, we investigated whether this attribute substitution effect can also affect the interpretation of a simple visual event sequence. We used a magic trick called the ‘Flushtration Count Illusion’, which involves a technique used by magicians to give the illusion of having seen multiple cards with identical backs, when in fact only the back of one card (the bottom card) is repeatedly shown. In Experiment 1, we demonstrated that most participants are susceptible to the illusion, even if they have the visual and analytical reasoning capacity to correctly process the sequence. In Experiment 2, we demonstrated that participants construct a biased and simplified representation of the Flushtration Count by substituting some attributes of the event sequence. We discussed of the psychological processes underlying this attribute substitution effect.     

Appearance matters: Attentional orienting by new objects in the precueing paradigm

Five experiments examined whether the appearance of a new object is able to orient attention in the absence of an accompanying sensory transient. A variant of the precueing paradigm (Posner & Cohen, 1984 Posner, M. I. and Cohen, Y. 1984. “Components of attention”. In Attention and performance X, Edited by: Bouma, H. and Bouwhuis, D. G. 55–66. Hove, , UK: Lawrence Erlbaum Associates Ltd.  [Google Scholar]) was employed in which the cue was the onset of a new object. Crucially, the new object's appearance was not associated with any unique sensory transient. This was achieved by using the variant “annulus” procedure recently developed by Franconeri, Hollingworth, and Simons (2005). Results showed that unless observers had an attentional set explicitly biased against onset, a validity effect was observed such that response times were shorter for targets occurring at the location of the new object relative to when targets occurred at the location of the “old” object. We conclude that new onsets do not need to be associated with a unique sensory transient in order to orient attention.     

The Magic Background of Modern Anti-Semitism by Adolf Leschnitzer

A range of joyful emotions may be woven into the therapeutic group process for older persons. Experiencing joy is a powerful healing factor because it helps reduce the pain of losses inherent in the aging process, restores self-confidence and hope, and renews an investment in living. This paper identifies ten facets of joy which can help develop a therapeutic group climate. Examples from the authors' practice illustrate conceptual approaches.     

Meaning and ontology

These are two related essays. The first, “Meaning,” defends the so‐called reference theory against current criticisms. Exemplification and the intentional tie are two subsistents. Subsistence is a mode of existence; mere possibility is another. That requires two distinctions; one among four uses of ‘possible'; one among three uses of ‘same’ in the phrase ‘the same fact'; which in turn permits an adequate account of false belief. The second essay, “Inclusion, Exemplification, and Inherence in G. E. Moore,” displays the impact of the fundamental ontological dialectic on the development of Moore's thought. His notion of nonnatural properties provides the early cue. His eventual failure to account for false belief is traced to his eventual nominalism.