Feature processing during high-rate auditory selective attention

Auditory event-related brain potentials (ERPs) and reaction times were, analyzed in a selective attention task in which subjects attended to tone pips presented at high rates-Xinterstimulua intervals [ISIs] of 40-200 msec). Subjects responded to infrequent target tones of a specified frequency (250 or 4000 Hz) and location (left or right ear) that were louder than otherwise identical tones presented randomly to the left and right ears. Negative difference (Nd) waves were isolated by subtracting ERPs to tones with no target features from ERPs to the same tones when they shared target location, frequency, or both frequency and location cues. Nd waves began 60-70 msec after tone onset and lasted until 252–350 msec after tone onset, even for tones with single attended cues. The duration of Nd waves exceeded the ISIs between successive tones, implying that several stimuli underwent concurrent analysis. Nd waves associated with frequency processing had scalp distributions different from those associated with location processing, implying that the features were analyzed in distinct cortical areas. Nd waves specific to auditory feature conjunction were isolated. These began at latencies of 110–120 msec, some 30-40 msec after the Nds to single features. The relative timing of the different Nd waves suggests that auditory feaure conjunction begins after a brief parallel analysis of individual features but before feature analysis is complete.     

Instructional effects in the use of the mnemonic keyword method for learning German nouns and their grammatical gender

The use of the mnemonic keyword method involves (a) the formation of an orthographic link between the form of a foreign word and that of a physically similar word in one's mother tongue (i.e. the keyword), and (b) the formation of a semantic link between the referent of the foreign word and that of the keyword. In a variation of this study method, English-speaking learners were asked to study the grammatical gender of German nouns by substituting the concepts of a woman, a man, and an inanimate object for the feminine, masculine, and neuter genders, respectively. This more concrete representation of gender was then to be incorporated to an interactive image along with the referent of the keyword and that of the German noun. The three experiments reported in this paper yielded four main results: (a) instructing learners to recode the gender tag and to include its representation into an interactive mental image along with the referent of the German noun facilitated the recall of genders: (b) the facilitating effect of imagery instructions on the recall of genders was obtained only if the English translation was recalled; (c) the probability of correctly reporting the gender given that the English translation was not recalled was higher than the baseline for guessing if the learners were instructed to encode the gender before the translation, otherwise it was consistently near the baseline: and (d) in contrast with prior studies with French-speaking subjects, the modified keyword method did not always enhance the recall of the familiar translation equivalents. The discussion bears mainly on the factors that might account for the difficulty of detecting a consistent keyword advantage in the recall of the familiar translation.     

Neuropsychological, learning and psychosocial profile of primary school aged children with the velo-cardio-facial syndrome (22q11 deletion): evidence for a nonverbal learning disability?

In this exploratory study, the neuropsychological and learning profile of nine primary school age children with velo-cardio-facial syndrome (VCFS) was studied by systematic neuropsychological testing. In five out of nine children, the following profile was found: a VIQ-PIQ discrepancy (in favor of the VIQ), significantly better scores (.05 level) for reading (decoding) and spelling compared to arithmetic, deficient tactile-perceptual skills (difficulties mainly on the left side of the body), weak but not deficient visual-perceptual abilities, deficient visual-spatial skills, extremely poor psychomotor skills (gross motor skills more deficient than fine motor skills), problems with processing of new and complex material, poor visual attention, good auditory memory and relatively good language skills. These findings correspond to the pattern of neuropsychological assets and deficits that has been described for the syndrome of nonverbal learning disabilities (NLD) (Rourke, 1987, 1988, 1989, 1995). The psychosocial profile of all nine children with VCFS also correspond to that of children with NLD. Further studies on the relationship between cognitive function, behavior, psychiatric disorder and abnormalities in brain anatomy in young people with VCFS will be needed. In clinical practice, it is worthwhile exploring in greater depth the neuropsychological functions of children with VCFS to rule out NLD, since they may benefit from specific remediation following the learning principles of the NLD-treatment.     

Vestibular sensitivity and vection chronometry along the spinal axis in erect man

A study is reported of the relations between vestibular sensitivity and vection chronometry in healthy human adults. Twenty-three subjects were examined. For both vestibular and vection investigations, the subjects were seated in an armchair with the spinal axis aligned with the earth vertical and the head normally erect. The subjects' vestibular thresholds for detection of vertical upward accelerations were assessed by a double-staircase psychophysical method. The subjects' vection onset latencies were measured for both upward and downward directions. Since the vection onset latencies are presumed to be shortened by the decrease of the conflict between visual and vestibular afferents, the less-vestibular-sensitive subjects were hypothesised to have shorter vection onset latencies than the more-vestibular-sensitive ones. As expected, the results indicate a negative correlation between vestibular thresholds and vection onset latencies: the higher the vestibular thresholds, the lower the vection onset latencies.     

Self-reported adjustment of teenagers at soccer training centers: the Soccer Trainee Adjustment Scale

The aim of this study was to develop a questionnaire to measure adjustment of teenagers at soccer training centers, particularly newcomers. The Soccer Trainee Adjustment Scale was adapted from the Institutional Integration Scale and assesses the trainee's adjustment to operating and social activities. The scale was tested on a sample of 136 trainees from four soccer centers. Exploratory analysis indicated that the 13 items formed five factors: peer adjustment, boarding supervisor adjustment, soccer adjustment, scholastic adjustment, and boarding adjustment. These factors had internal consistency reliability ranging from .76 to .94.     

Path planning under spatial uncertainty

In this article, we present experiments studying path planning under spatial uncertainties. In the main experiment, the participants' task was to navigate the shortest possible path to find an object hidden in one of four places and to bring it to the final destination. The probability of finding the object (probability matrix) was different for each of the four places and varied between conditions. Givensuch uncertainties about the object's location, planning a single path is not sufficient. Participants had to generate multiple consecutive plans (metaplans)--for example: If the object is found in A, proceed to the destination; if the object is not found, proceed to B; and so on. The optimal solution depends on the specific probability matrix. In each condition, participants learned a different probability matrix and were then asked to report the optimal metaplan. Results demonstrate effective integration of the probabilistic information about the object's location during planning. We present a hierarchical planning scheme that could account for participants' behavior, as well as for systematic errors and differences between conditions.     

Determinants of task performance and invested effort: a need for closure by relative cognitive capacity interaction analysis

This study examines the simultaneous effects of need for closure (NFC) and relative cognitive capacity on invested effort and task performance within the integrative analysis framework using behavioral data. Two main results were obtained. First, the authors revealed a significant interaction effect between relative cognitive capacity (manipulated through task difficulty) and NFC (manipulated through time pressure, noise, and fear of invalidity as well as assessed by an individual differences measure) on effort investment. Second, contrary to dispositional NFC, manipulations yielded a "dual effect" because they negatively affected task performance as well as invested effort. The latter result was interpreted as an indication that noise and time pressure manipulations also tax cognitive resources. The two main findings are discussed and the authors go further into the divergences between dispositional and manipulated NFC.     

Procedural justice effects on self-esteem under certainty versus uncertainty emotions

Building upon the idea that procedural justice effects are more pronounced when uncertainty is high, we proposed that recall of an uncertainty-eliciting emotion (fear) will render people more responsive to variations in procedural justice than will recall of a certainty-eliciting emotion (disgust). Results from Study 1, (n = 79 undergraduate students) confirmed that a fair procedure (voice condition) enhanced self-esteem relative to an unfair procedure (no voice condition) to a greater extent when people recalled fear than when they recalled disgust. Results from Study 2 (n = 147 undergraduate students) also showed that a fair, relative to an unfair, procedure enhanced self-esteem more strongly when recalling the emotion of fear rather than disgust, but only when these emotions were recalled from a self-immersed than a self-distanced perspective. These findings confirm that discrete emotions that orient people to interpret situations in uncertain versus certain ways are important antecedents of procedural justice effects.