Effects of Attention on the Strength of Lexical Influences on Speech Perception: Behavioral Experiments and Computational Mechanisms

The effects of lexical context on phonological processing are pervasive and there have been indications that such effects may be modulated by attention. However, attentional modulation in speech processing is neither well documented nor well understood. Experiment 1 demonstrated attentional modulation of lexical facilitation of speech sound recognition when task and critical stimuli were identical across attention conditions. We propose modulation of lexical activation as a neurophysiologically plausible computational mechanism that can account for this type of modulation. Contrary to the claims of critics, this mechanism can account for attentional modulation without violating the principle of interactive processing. Simulations of the interactive TRACE model extended to include two different ways of modulating lexical activation showed that each can account for attentional modulation of lexical feedback effects. Experiment 2 tested conflicting predictions from the two implementations and provided evidence that is consistent with bias input as the mechanism of attentional control of lexical activation.     

A connectionist model of a continuous developmental transition in the balance scale task

A connectionist model of the balance scale task is presented which exhibits developmental transitions between ‘Rule I’ and ‘Rule II’ behavior [Siegler, R. S. (1976). Three aspects of cognitive development. Cognitive Psychology,8, 481–520.] as well as the ‘catastrophe flags’ seen in data from Jansen and van der Maas [Jansen, B. R. J., & van der Maas, H. L. J. (2001). Evidence for the phase transition from Rule I to Rule II on the balance scale task. Developmental Review, 21, 450–494]. The model extends a connectionist model of this task [McClelland, J. L. (1989). Parallel distributed processing: Implications for cognition and development. In R. G. M. Morris (Ed.), Parallel distributed processing: Implications for psychology and neurobiology (pp. 8–45). Oxford: Clarendon Press] by introducing intrinsic variability into processing and by allowing the network to adapt during testing in response to its own outputs. The simulations direct attention to several aspects of the experimental data indicating that children generally show gradual change in sensitivity to the distance dimension on the balance scale. While a few children show larger changes than are characteristic of the model, its ability to account for nearly all of the data using continuous processes is consistent with the view that the transition from Rule I to Rule II behavior is typically continuous rather than discrete in nature.     

The Relationship Between Caregiver Capacity and Intensive Community Treatment for Children with a Mental Health Crisis

We studied 9,220 children referred to a comprehensive mental health crisis stabilization program to examine the impact of caregiver capacity on crisis worker decisions to refer children for intensive community-based treatment as opposed to inpatient psychiatric hospitalization. Due to the different role of caregivers in the child welfare system, analyses were stratified by state custody status. Among both groups, there was a significant inverse association between child mental health need and referral to intensive community-based treatment. For children not in state custody with low mental health need, there was no difference in the likelihood of referral to intensive community-based treatment across levels of caregiver capacity. However, for children not in state custody with medium and high mental health needs, those whose caregivers were deficient or severely deficient were significantly more likely to be referred for intensive community-based treatment than were those who had capable caregivers. Multivariate analyses demonstrated similar results after controlling for potential confounding variables and confirmed that caregiver capacity contributes significantly to the logistic model’s classification accuracy. Results suggest further investigation of the impact of caregiver capacity on mental health crisis worker referral decisions is needed.     

Motivational and Other Sources of Work Accomplishments in Mid–Life: A Longitudinal Study

ABSTRACT Earned Income and work accomplishment were determined at age 41 for 89 adults whose mothers had been interviewed for their child-rearing practices when the adults were 5 years old. At age 31, in spontaneous thought but not self-report, n Achievement predicted earned income and socialized power motivation predicted work accomplishment at age 41. Hardships (or "bad breaks") during childhood and adolescence predicted work outcomes for both men and women, as did education for men. Parenting achievement pressure in the first 2 years of life was associated with adult n Achievement and earned income, while moderate encouragement of assertiveness by mothers who were warm to boys and cool to girls was associated with adult socialized power motivation and work accomplishment. Controls for social class of origin, IQ, temperament, and education did not explain the relations between parenting, motivation, and work outcomes, although education played a larger role for men than women who worked both inside and outside the home.     

Preliminary letter identification in the perception of words and nonwords.

Words with mixed uppercase and lowercase letters (e.g. fAdE) were perceived more accurately than mixed-case pseudowords (e.g. gAdE), and mixed-case pseudowords were perceived more accurately than mixed-case unrelated letter strings (e.g. eFdT). In addition, same-case words were perceived more accurately than their mixed-case counterparts. The same held true for pseudowords but not for unrelated letter strings. The results are compatible with the view that both letter identify and visual form information are used in word perception.     

Motivational factors in health and disease

Evidence is reviewed that measures of motive strength, as measured through content analysis of associative thought, are related to physiological systems, the functioning of which affect health outcomes. Studies show that affiliative and power motive syndromes assessed in associative thought are associated with health and illness. A relaxed or easygoing affiliative motive syndrome characterizes insulin dependent Type I diabetics and can, if aroused, lead to poorer blood sugar control in such diabetics. A stressed power motive syndrome is associated with sympathetic activation, release of stress hormones, depressed immune functions, and greater susceptibility to infectious diseases. Affiliative trust and a greater sense of agency as measured in associative thought content are associated with better health. An intervention study and a longitudinal study have demonstrated that differences in the levels of these motivational variables are not simply the result of illness but lead to alterations in subsequent health status.     

Indirectly expressed motivational deficits among arthritic adults

The present experiment examined whether adults suffering from arthritis evidence motivational deficits reflective of a diminished sense of effectiveness in dealing with their environment. Content-coding of imaginative stories revealed that both osteoarthritics and rheumatoid arthritics possess significantly lower levels of achievement and power motivation compared with control subjects. Furthermore, arthritic patients with poor health status, as assessed by the Arthritis Impact Measurement Scales, were found to be especially low in their level of achievement motivation. No differences between arthritics and healthy controls were found when self-report measures of achievement and power motivation were used in place of the thematically coded indices. That is, arthritics reported that their desire to do something better and their desire to influence others was just as strong as that of healthy adults. This suggests that arthritic adults suffer from a motivational deficit that may not be revealed in response to direct questions about their motives or goals.This research was funded by a National Institute of Health Grant (AR 20613) to the Multipurpose Arthritis Center at Boston University and by a fellowship from the Seaver Institute.     

WEIGHT CONSERVATION IN ZAMBIAN CHILDREN

Pour la première fois, selon L'A., L'étude de la conservation a été réalisée avec une méthode non-verbale sur des enfants de culture non-européenne. Les résultats qui ont été obtenus avec cette méthode dans un groupe contrôle d'enfants d'origine et d'éducation européennes sont comparables á ceux qui ont été trouvés en Suisse et aux Etats-Unis avec la méthode génevoise classique. On peut done s'appuyer avec une certaine confiance sur ce fait pour analyser les resultats obtenus par la méthode non-verbale avec 200 élèves d'école primaire de Zambie et les comparer aux données d'une étude australienne sur des enfants aborigènes dans laquelle la méthode classique a été utilisée. La moitié environ des enfants zambiens atteignent L'adolescence sans réussir les épreuves de conservation du poids; L'A. dégage les implications et les causes possibles d'un tel fait, et spécialement L'influence des facteurs de milieu : par exemple, la langue qui est utilisée comme véhicule d'éducation, également la qualité du matériel scolaire et de L'enseignement réel, enfin, L'effet possible de la malnutrition.     

An investigation of cross-modality effects in implicit and explicit memory

Three experiments are reported which investigate the effects of study/test compatibility on implicit and explicit memory performance. In the first experiment subjects either named each visually presented target item, or generated each item from a close semantic associate. They were then given either a free recall test or a visual word-stem completion task. A generation effect was evident in the free recall data (generated items were better recalled than named items) and this pattern was reversed for word-stem completion. In the second experiment subjects again named or generated items and were then given an auditory word-stem completion task. Under these conditions, cross-modal priming was found both for named and for generated items, but the reverse generation effect, which was evident in Experiment 1 with word-stem completion, was eliminated. In the final experiment, subjects were asked to name the targets, read them silently, or read them under conditions of articulatory suppression, and were then given an auditory stem completion task. Significant cross-modal priming was observed under all three conditions. The strongest priming was found in the naming condition and the weakest in the suppression condition. The results are interpreted within the transfer appropriate processing framework.