Stroke damages attentional maintenance in working memory

Stroke is the main cause of acquired disability in adults, and specific deficits in working memory (WM) are among the most common cognitive consequences. In neuropsychological routine, WM is most of the time investigated in the framework of the multicomponent model (Baddeley & Hitch, 1974, The psychology of learning and motivation, 47). Using a more recent theoretical WM model, the time-based resource-sharing (TBRS) model (Barrouillet et al., 2011, Psychol. Rev., 118, 175), the aim of the present study was to investigate in young post-stroke patients to which extent attentional maintenance is impaired in WM. To address this question, we discarded other factors known to directly influence WM performance, that is processing speed and short-term memory span. We proposed to 53 post-stroke patients and to 63 healthy controls a complex span paradigm in which participants were asked to alternate between the memorization of a series of images and a concurrent parity judgement task of a series of digits. To investigate the attentional maintenance processes, we manipulated the cognitive load (CL) of the concurrent task. CL effect is typically interpreted as the involvement of attentional maintenance processes. The task was adapted to each participant according to their processing speed and memory span. As expected, the results showed higher recall performance in healthy controls compared with post-stroke patients. Consistent with the literature, we also observed higher performance when the CL was low compared with high. However, the improvement in recall at low CL was smaller for post-stroke patients compared with controls, suggesting that post-stroke WM deficit could be in part due to a deficit of the attentional maintenance processes.     

Der ästhetische Eindruck als Funktion der „objektiven“ und „phänomenalen“ Komplexität von Bildern

Zusammenfassung Es wird von der Annahme ausgegangen, daß die häufig gefundene verkehrt u-förmige Beziehung zwischen der objektiven Komplexität (syntaktischen Information) von Reizkonfigurationen und dem Grad des durch sie ausgelösten Wohlgefallens durch eine Variable phänomenale Komplexität vermittelt wird, die ihrerseits von der Schwierigkeit einer zentralen Codierung (kognitiven Repräsentation) der Reizgrundlage abhängt. Der Zusammenhang zwischen objektiver und phänomenaler Komplexität wird als verkehrt u-förmig, die Beziehung zwischen phänomenaler Komplexität und Wohlgefallen hingegen als monoton angenommen.Um den Grad der phänomenalen Komplexität zweidimensionaler visueller Bildmuster unabhängig von evaluativen Einflüssen schätzen zu können, wurde folgende Technik angewendet: Alle nach den Merkmalen Rasterfeinheit, Farbanzahl und Verteilung der Farbhäufigkeiten variierten konstruierten Rasterbilder wurden in standardisierte Einzelteile zerschnitten. Die Versuchspersonen erhielten die Aufgabe, jedes Bild nach Art eines Puzzles aus den Einzelteilen zu rekonstruieren. Als Indikator der phänomenalen Komplexität wurde die Rekonstruktionszeit herangezogen.Die gefundenen Beziehungen zwischen objektiver Komplexität, subjektiver Komplexität und Wohlgefallen entsprechen — zumindest im untersuchten Komplexitätsbereich — der oben angeführten Hypothese.

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The esthetic impression as a function of the objective and phenomenal complexity of pictures

Summary Previous studies frequently revealed an inverted u-shaped relation between objective complexity (syntactic information) and the degree of judged pleasingness of stimulus configurations. The study presented here rests on the hypothesis that this relation is mediated by a variable phenomenal complexity which depends on the difficulty of encoding the configuration perceptually. It is hypothesized that the relation between objective and phenomenal complexity is inverted u-shaped, whereas the relation between phenomenal complexity and pleasingness is monotonic.To get an estimate of the phenomenal complexity of two-dimensional visual patterns which is independent of evaluation effects the following technique was used: Each of the pattern was presented to the Ss in form of a puzzle and had to be reconstructed by aid of the original pattern. Patterns were generated on n × n-matrices with varying n, varying number of colors and varying distribution of color frequencies. As an indicator of phenomenal complexity the time needed to reconstruct the original pattern was used.The relations between objective complexity, phenomenal complexity and evaluation conformed quite well to the assumptions cited above — at least within the range of objective complexity investigated.

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Frau cand. phil. Andrea Werner danke ich für ihre wertvolle Hilfe bei der Durchführung und Auswertung der Versuche.     

An alternative procedure for analyzing job analysis results for content-oriented test development

Content-oriented test development requires information derived from a comprehensive job analysis. The job data typically consist of task and skill statements identified by subject matter experts. These statements characterize a target job and are then used to develop the test plan and item budget. The predominant practice for combining data from the task and job skill domains to facilitate preparation of a test plan and item budget is an impressionistic approach. This study reports variations and extensions of an alternative quantitative procedure for linking task and job skill data (Hughes & Prien, 1989) using results obtained in field studies. The results indicate that the procedure reported by Hughes and Prien (1989) yields consistent results. Also, modifications to the procedure result in more detailed solutions.Dr. Charles Lawshe graciously contributed three sets of job analysis data to this research project. Dr. Lawshe also provided a very thoughtful and cogent critique of our attempts to express these thoughts to a user audience and for this we are grateful.     

UNESCO, genetics, and human rights

In response to a mandate conferred on the International Bioethics Committee (IBC) of UNESCO in November 1993, the IBC has drafted a "universal declaration on the human genome and human rights," which will be considered by the General Conference of UNESCO in November 1997. This article discusses the development of the document and provides the text of the "revised preliminary draft" of the declaration.     

Propositional attitudes and formal ontology

This paper develops — within an axiomatic theory of properties, relations, and propositions which accords them well-defined existence and identity conditions — a sententialist-functionalist account of belief as a symbolically mediated relation to a special kind of propositional entity, theproxy-encoding abstract proposition. It is then shown how, in terms of this account, the truth conditions of English belief reports may be captured in a formally precise and empirically adequate way that accords genuinely semantic status to familiar opacity data.I am deeply indebted to Edward Zalta for many helpful comments and suggestions.     

Taking an individualized approach to the assessment of self-efficacy and the prediction of alcoholic relapse

The present study reports on a clinical instrument designed for assessing self-efficacy in alcoholics. In contrast to studies that construct general measures, it was proposed that taking an individualized approach to assessment might offer an effective methodology. Thirty-four alcoholics in an outpatient, behaviorally oriented treatment program participated as subjects. During therapy, an Individualized Self-Efficacy Survey (ISS) was developed for each subject. The ISS was developed by (a) administering the Drinking Patterns Questionnaire (DPQ) to identify important problem areas (e.g., work, children, marital) and specific drinking antecedents and (b) constructing a 15-item scale using each drinker's most important cues. The utility of having clients choose their own items was supported by finding a significant relationship between problem areas identified as important on the DPQ and the areas reported as surrounding relapse. ISS ratings were reflective of efficacy changes during treatment, while posttreatment ISS scores were predictive of subsequent relapse. Situation-specific prediction of relapse was not found. The advantages of this methodology for clinical use are discussed, while general directions for future research are suggested.     

Of community,organs and obligations: Routine salvage with a twist

This paper makes the assumption that organ transplantation is, under some conditions at least, a proper use of communal medical resources. Proceeding from this assumption, the author: (1) sketches the history of the problem; (2) briefly examines the prevalent models of communal structure and offers an alternate version; (3) discusses notions of justice and obligation derived from these different models; (4) applies these to the practice of harvesting organs for transplantation; and then (5) offers a different process for harvesting organs from the newly dead. If community is viewed as united by a set of shred goals and common values among which the value of community itself is important, then certain reciprocal obligations among members obtain. I suggest that routine salvage of organs from the newly dead be instituted but that it be routine salvage “with a twist”: rather early in life all members of the community are given the opportunity to refuse but their refusal carries the reciprocal condition that they cannot later become the recipients of that which they refuse to others.     

Smoking cessation with behaviour therapy or acupuncture—A controlled study

Five hundred and fifty-eight cigarette smokers (mean 31 cigarettes/day) were randomized in four groups: Acupuncture, Behaviour Therapy, Placebo Medication and Waiting-list Control. The life-table analysis of smoking cessation showed, at a 12-month follow-up, no difference between Acupuncture, Behaviour Therapy and Placebo. Differences appeared only in an analysis of the abstinent subjects at each data point. Behaviour Therapy and Acupuncture accounted for significantly more abstinent subjects than Placebo at the end of the 2-week therapeutic phase. However at 9 and 12 months Acupuncture had a statistically-significant greater number of abstinent subjects than Behaviour Therapy, but there was no difference between Acupuncture and Placebo. The percentage decrease in smoking from baseline appeared significantly greater at 12 months in the first three groups than in the Control conditions. However, as in most smoking-cessation studies, the overall effect was small and non-specific. The results reflect the importance of maintenance programmes and of the prevention of addiction.     

Differential effects of identification with family and peers on coping with developmental tasks in adolescence

Adolescents from three Italian cities responded to a questionnaire concerning the particular peer-group with which they were associated and identification with their family, aspects of the process of coping with seven developmental tasks, and demographic characteristics. The participants were 1600 male and female teenagers, with a mean age of 16.28 years, who were approached at schools and various meeting places in three Italian cities. The study shows that effective coping with developmental tasks depends largely on the degree of identification with both family and peer-group. Those who identify with both social groupings show advantages in various critical situations. Adolescents only identifying with either family or peers get emotional and instrumental support from that group but not from the other, thus, they are supported in some critical situations but not in others. Adolescents who are unwilling or unable to identify with their family and/or their peers are less successful in managing the transition to adulthood than others who are close to their parents and peers. Consistent with the findings of previous studies, the type of group adolescents join, be it a formal group or an informal street group, has no significant effect on their coping strategies.