Neural Representations of Nondeclarative Memories

ABSTRACT— Nondeclarative learning refers to abilities characterized by a lack of awareness of what has been learned and an independence from medial temporal lobe structures that support conscious memories of facts and events. Neuroimaging approaches have been used extensively in two domains of nondeclarative learning—priming and skill learning—to investigate the neural substrates supporting performance. Recent neuroimaging studies have attempted to understand what is being learned in different tasks in order to inform psychological theories of nondeclarative memory. For example, priming may be considered a form of perceptual learning or a form of stimulus–response learning, and correlations between performance and activation patterns in different regions may suggest the nature of the brain changes that support behavior. The attainment of expertise in a skill has been characterized as greater efficiency of processing in the same neural structures that support novice performance or, alternatively, as the recruitment of additional regions. Current research suggests that, within the domains of priming and skill learning, there is much heterogeneity in the underlying brain representations and psychological theories will need to account for these variations.     

Selection Test Anxiety: Investigating applicants' self‐ vs other‐referenced anxiety in a real selection setting

Test anxiety has received limited attention in personnel selection research, although it may impair the test performance of applicants. This paper describes the development and validation of a new two‐dimensional measure of applicants' test anxiety, namely the Self‐ versus Other‐Referenced Anxiety Questionnaire (SOAQ), that embeds worrisome cognitions of anxious applicants in the social evaluative context of ‘self’ (Self‐Referenced Anxiety) and ‘significant others’ (Other‐Referenced Anxiety). An exploratory factor analysis (calibration sample), followed by a confirmatory factor analysis (validation sample) and correlations with several proximal and distal theoretical constructs indicated satisfactory psychometric properties and construct validity for both SOAQ scales. Structural equation modeling further showed a differential impact of Self‐ and Other‐Referenced Anxiety on applicants' test performance within a real personnel selection context. The scientific and practical relevance of these findings are discussed.     

Applicant Selection Expectations: Validating a multidimensional measure in the military

Research has suggested the importance of applicants' expectations of forthcoming selection procedures in predicting how applicants react to selection procedures. Validated measures of selection expectations are still scarce, however. This study reports on the validation of the Applicant Expectation Survey (AES), intended to measure applicants' expectations of forthcoming selection procedures. The AES was validated using three military applicant samples and showed sound psychometric properties (i.e., reliability, measurement invariance, discriminant validity) for a five‐factorial oblique structure consisting of 26 items. The five factors (i.e., Warmth/respect, Chance to demonstrate potential, Difficulty of faking, Unbiased assessment, Feedback) were positively related to several organizational outcome measures and to applicants' perceptions of the selection procedure, providing evidence for the predictive validity of the AES.     

Perceptual expertise enhances the resolution but not the number of representations in working memory

Despite its central role in cognition, capacity in visual working memory is restricted to about three or four items. Curby and Gauthier (2007) examined whether perceptual expertise can help to overcome this limit by enabling more efficient coding of visual information. In line with this, they observed higher capacity estimates for upright than for inverted faces, suggesting that perceptual expertise enhances visual working memory. In the present work, we examined whether the improved capacity estimates for upright faces indicates an increased number of "slots" in working memory, or improved resolution within the existing slots. Our results suggest that perceptual expertise enhances the resolution but not the number of representations that can be held in working memory. These results clarify the effects of perceptual expertise in working memory and support recent suggestions that number and resolution represent distinct facets of working memory ability.     

Striatal outcome processing in healthy aging

Functional MRI of young adults has implicated the striatum in the processing of rewarding and punishing events. To date, only two published experiments (Samanez-Larkin et al., 2007; Schott et al., 2007) have explored similar phenomena in older adults, with both studies emphasizing the anticipation of monetary outcomes. To better understand older participants’ striatal responses to delivered outcomes, we engaged 20 older adults and 13 younger adults in a card-guessing task that rewarded correct guesses with monetary gain and punished incorrect guesses with monetary loss. Overall, the older adults retained most of the typical features of the striatal response, so that activity in the caudate head showed reliable differentiation between rewards and punishments during the 6- to 9-sec postoutcome window. Comparison of the older and younger adults also pointed to some potential aging effects on outcome activity, including reductions in the magnitude and extent of striatal activation, and a trend for the older adults to show a decreased early punishment response. In sum, our data suggest that the signaling of outcome valence remains relatively stable into late adulthood, although more research is needed to understand some subtle changes that might occur across the life span.     

Comparison of voice acquisition methodologies in speech research

The use of voice acoustic techniques has the potential to extend beyond work devoted purely to speech or vocal pathology. For this to occur, however, researchers and clinicians will require acquisition technologies that provide fast, accurate, and cost-effective methods for recording data. Therefore, the present study aimed to compare industry-standard techniques for acquiring high-quality acoustic signals (e.g., hard drive and solid-state recorder) with widely available and easy-to-use, computer-based (standard laptop) data-acquisition methods. Speech samples were simultaneously acquired from 15 healthy controls using all three methods and were analyzed using identical analysis techniques. Data from all three acquisition methods were directly compared using a variety of acoustic correlates. The results suggested that selected acoustic measures (e.g., f 0, noise-toharmonic ratio, number of pauses) were accurately obtained using all three methods; however, minimum recording standards were required for widely used measures of perturbation.     

Change in metacognitions predicts outcome in obsessive–compulsive disorder patients undergoing treatment with exposure and response prevention

Wells' (Wells, A. (1997). Cognitive therapy of anxiety disorders: a practice manual and conceptual guide. Chichester, UK: Wiley) metacognitive model of obsessive–compulsive disorder (OCD) predicts that metacognitions must change in order for psychological treatment to be effective. The aim of this study was to explore: (1) if metacognitions change in patients undergoing exposure treatment for OCD; (2) to determine the extent to which cognitive and metacognitive change predicts symptom improvement and recovery. The sample consisted of 83 outpatients with a diagnosis of OCD who completed exposure and response prevention treatment. The Yale–Brown Obsessive–Compulsive Scale (Y-BOCS), the Metacognitions Questionnaire (MCQ-30) and the Obsessive Beliefs Questionnaire (OBQ-44) were administered before treatment, after treatment, and at 12-month follow-up. Treatment resulted in significant changes in symptoms, metacognition score, responsibility and perfectionism. Regression analysis using post-treatment Y-BOCS as the dependent variable indicated that when the overlap between predictors was controlled for, only changes in metacognition were significant. Changes in metacognitions explained 22% of the variance in symptoms at post-treatment when controlling for pre-treatment symptoms and changes in mood. A further regression revealed that two MCQ-30 subscales made individual contributions. The patients had significantly higher scores compared to community controls on the MCQ-30. Patients who achieved clinical significant change had lower scores on the MCQ-30 compared to patients who did not change. The results did not change significantly from post-treatment to follow-up assessment. These findings provide further support for the importance of metacognitions in treating OCD.     

Self-esteem regulation after success and failure to attain unconsciously activated goals

People are motivated to establish and maintain a positive self-image. When people fail to attain their goals self-esteem is threatened, and this elicits the motivation to protect or repair self-esteem. We investigated whether success and failure to attain goals affects self-esteem if these goals were unconsciously activated. In three experiments, we tested and confirmed the hypothesis that self-esteem is indeed affected by success and failure to attain unconsciously activated goals. In two additional experiments, we demonstrated that people were motivated to protect or restore self-esteem after failure to attain an unconsciously activated achievement goal.     

Learning new problem-solving strategies leads to changes in problem representation

Children sometimes solve problems incorrectly because they fail to represent key features of the problems. One potential source of improvements in children's problem representations is learning new problem-solving strategies. Ninety-one 3rd- and 4th-grade students solved mathematical equivalence problems (e.g., 3 + 4 + 6 = 3 + __) and completed a representation assessment in which they briefly viewed similar problems and either reconstructed each problem or identified it in a set of alternatives. Experimental groups then received a lesson about one or both of two solution strategies, the equalize strategy and the add–subtract strategy. A control group received no instruction. All children completed posttest assessments of representation and problem solving. Children taught the equalize strategy improved their problem representations more than those not taught it. This pattern did not hold for the add–subtract strategy. These results indicate that learning new strategies is one source of changes in problem representation. However, some strategies are more effective than others at promoting accurate problem representation.     

What's the difference? Insider perspectives on the importance,content, and meaning of interpersonal differences

This study presents a new approach to examine how team members experience interpersonal differences. This approach offers a way to examine how team members experience their differences with specific other individuals, and how these differences are related to the amount of perceived conflict with these individuals in an organizational context. Data from a non‐profit governmental institution in The Netherlands were analysed, including 80 participants from 15 diverse teams. Five types of differences were salient to the individuals in this sample: differences related to extraversion; work pose; approach to work; task‐related expertise; and seniority. Furthermore, individuals tend to contrast positive and negative evaluations of differences related to extraversion and approaches to work, but to conceptualize positive and negative evaluations of task‐related expertise, seniority, and work pose as more mutually independent phenomena. Moreover, we found that differences related to task‐related expertise were negatively related to both task and relationship conflict. In contrast, differences related to extraversion were positively related to both task and relationship conflict. Finally, the approach‐to‐work cluster was positively related to only task conflict.