Inhibition and interference in the think/no-think task

Five experiments using the think/no-think (TNT) procedure investigated the effect of the no-think and substitute instructions on cued recall. In Experiment 1, when unrelated A–B paired associates were studied and cued for recall with A items, recall rates were reliably enhanced in the think condition and reliably impaired below baseline in the no-think condition. In Experiments 2 and 5, final recall was cued with B items, leading to reliably higher recall rates, as compared with baseline, in both the think and no-think conditions. This pattern indicates backward priming of no-think items. In Experiments 3 and 4, the no-think instruction was replaced with a thought substitution instruction, and participants were asked to think of another word instead of the studied one when they saw the no-think cued items. As in Experiments 1 and 2, the same amount of forgetting of B items was observed when A items were the cues, but in contrast to Experiment 2, there was no increase in the recall performance of A items when B items were the cues. These results suggest that not thinking of studied items or, alternatively, thinking of a substitute item to avoid a target item may involve different processes: the former featuring inhibition and the latter interference.     

Interference resolution in retrieval-induced forgetting: Behavioral evidence for a nonmonotonic relationship between interference and forgetting

Retrieving memories renders related memories less accessible. This phenomenon, termed retrieval-induced forgetting (RIF), is thought to be the result of processes that resolve interference during competitive retrieval. In several studies, researchers have manipulated the level of interference to test different theoretical accounts of RIF (e.g., inhibitory vs. noninhibitory). However, the nature of how interference and RIF are related has not been systematically investigated. Here, we introduce a design that allows for assessing interference during competitive retrieval by measuring the recall RTs associated with target recall. Using such a design, we found that RIF occurred only when interference during competitive retrieval reached moderate levels, but not when it was too low or too high. This finding might indicate that low levels of interference do not trigger interference resolution, whereas interference resolution might fail when the interference reaches extremely high levels.     

The interplay of trait worry and trait anxiety in determining episodic retrieval: The role of cognitive control

Worrying is a key concept in describing the complex relationship between anxiety and cognitive control. On the one hand, cognitive control processes might underlie the specific tendency to engage in worrying (i.e., trait worry), conceptualized as a future-oriented mental problem-solving activity. On the other hand, the general tendency to experience the signs and symptoms of anxiety (i.e., trait anxiety) is suggested to impair cognitive control because worrisome thoughts interfere with task-relevant processing. Based on these opposing tendencies, we predicted that the effect of the two related constructs, trait anxiety and trait worry, might cancel out one another. In statistics, such instances have been termed suppressor situations. In four experiments, we found evidence for such a suppressor situation: When their shared variance was controlled, trait worry was positively whereas trait anxiety was negatively related to performance in a memory task requiring strategic, effortful retrieval. We also showed that these opposing effects are related to temporal context reinstatement. Our results suggest that trait worry and trait anxiety possess unique sources of variance, which differently relate to performance in memory tasks requiring cognitive control.     

Morphological patterns in Hungarian children with Williams syndrome and the rule debates

Williams syndrome (WMS), a rare neurogenetic disorder, has been in the forefront of research in cognitive psychology for the last 10 years. Studies of grammatical development in 14 Hungarian WMS children are presented: they were examined on tasks testing regular and irregular morphology; measures of digit span were also obtained. Results on the production of accusative and plural forms confirmed for Hungarian that regardless of the frequency of the item, inflected forms of irregulars are harder to produce, and often regularized in WMS, revealing a dissociation between the rules of grammar vs. the mental lexicon. Overall performance on the morphology task is associated with the capacity of phonological short-term memory: subjects with higher span perform better on both tasks. The specification of the surprisingly close relation of phonological short-term memory with the linguistic measures awaits further study.     

Developing of an English Version of the Aggressive Driving Behavior Test (AVIS). Improving the Construct Validity of Aggressive Driving

The research investigated the psychometric properties and the discriminant validity of the English version of the Questionnaire for the Assessment of Aggressive Driving Behavior (AVIS). Study 1 assessed the psychometric properties of the instrument. Internal consistency ranged from 0.77 to 0.92. Exploratory factor analysis did not support the original five factor structure, Instrumental Aggression and Acting Out being unified in a single factor. Following the confirmatory factor analysis a version with 26 items and 3 factors was obtained. Inter-scale correlations showed that the dimensions of the AVIS are inter-correlated. Study 2 verified the discriminant validity of the English version of the AVIS by testing the relationships between the AVIS dimensions and the DAX (Driving Anger Expression Inventory) dimensions. The results showed good discriminant validity, the dimensions of the two instruments being uncorrelated. In conclusion, the findings contribute to the development of the driving aggression construct by adding new dimensions to it.     

The Early Lives of Highly Creative Persons: The Influence of the Complex Family

Over the last 50 years, theoretical, speculative, and empirical scholarship has examined the influence of early family context on subsequent accomplishments in children of high ability. Building upon 40 years of creativity literature focusing on optimal experience, this exploratory study applied the Complex Family Framework in a systematic analysis of creative adults' recollections of their early family lives. The study identifies evidence of the interplay of Integration and Differentiation, a catalyst for individual optimal experience, in the families of 9 creative exemplars who have made significant contributions to contemporary culture. Five participants represented the Arts and Humanities, three the Social Sciences, and one the Physical Sciences. The study demonstrates the utility of the Complex Family Framework in understanding families' contributions to children's later creative achievement.     

Impaired sequential and partially compensated probabilistic skill learning in Parkinson's disease

The striatal dopaminergic dysfunction in Parkinson's disease (PD) has been associated with deficits in skill learning in numerous studies, but some of the findings remain controversial. Our aim was to explore the generality of the learning deficit using two widely reported skill learning tasks in the same group of Parkinson's patients. Thirty-four patients with PD (mean age: 62.83 years, SD: 7.67) were compared to age-matched healthy adults. Two tasks were employed: the Serial Reaction Time Task (SRT), testing the learning of motor sequences, and the Weather Prediction (WP) task, testing non-sequential probabilistic category learning. On the SRT task, patients with PD showed no significant evidence for sequence learning. These results support and also extend previous findings, suggesting that motor skill learning is vulnerable in PD. On the WP task, the PD group showed the same amount of learning as controls, but they exploited qualitatively different strategies in predicting the target categories. While controls typically combined probabilities from multiple predicting cues, patients with PD instead focused on individual cues. We also found moderate to high correlations between the different measures of skill learning. These findings support our hypothesis that skill learning is generally impaired in PD, and can in some cases be compensated by relying on alternative learning strategies.     

Episodic inhibition

Six experiments examined the proposal that an item of long-term knowledge can be simultaneously inhibited and activated. In 2 directed forgetting experiments items to-be-forgotten were found to be inhibited in list-cued recall but activated in lexical decision tasks. In 3 retrieval practice experiments, unpracticed items from practiced categories were found to be inhibited in category-cued recall but were primed in lexical decision. If, however, the primes and targets in lexical decision were taken directly from the study list, inhibition was observed. Finally, it was found that when items highly associated with a study list were processed in between study and test, no inhibition in recall was present. These, and a broad range of other findings, can be explained by the concept of "episodic inhibition," which proposes that episodic memories retain copies of semantic knowledge structures that preserve patterns of activation/inhibition originally generated in those structures during encoding. ((c) 2006 APA, all rights reserved).     

Predictive value of psychosocial assessment for the mortality of patients waiting for liver transplantation

Selecting suitable candidates for liver transplantation is the most challenging task of pre-transplant evaluation. In addition to somatic assessment, psychosocial evaluation has been proven important in identifying patients at high risk of potential failure. The Transplant Evaluation Rating Scale (TERS) is a widely used rating instrument for the assessment of psychosocial risk factors before liver transplantation. The aim of this study was to explore the predictive value of TERS for mortality in liver transplant patients before and after transplantation. The medical records of patients referred for psychiatric evaluation before liver transplantation between 2003 –2013 were analysed. Administering TERS was part of the pre-transplant evaluation. The TERS scores of patients who died before and after transplantation were compared with those who survived following transplantation. One hundred and sixteen patients were referred for pre-transplant psychiatric evaluation. Patients with successful liver transplants scored significantly lower on TERS than those who died before transplantation (30.65 ± 6.06 vs. 34.75 ± 8.25, p = .031). Patients who died after transplantation scored significantly better on TERS than those who died before transplantation (28.79 ± 2.81 vs. 34.75 ± 8.25, p = .003). There was no significant difference between the deceased and surviving transplanted patients’ TERS scores (28.79 ± 2.81 vs. 31.19 ± 6.66, p = .365). TERS appears to be a suitable rating instrument to help select candidates who have higher chance to survive prior to transplantation but it could not predict post-transplant mortality.