Concurrent language and motor performance in bilinguals: a test of the age of acquisition hypothesis.

The objective of the present study was to test the hypothesis that the age at which a second language is acquired influences the pattern of cerebral lateralization associated with that language. Subjects who differed in terms of the age at which they had acquired their second language (English or French) were tested on a concurrent task paradigm involving motor and language performance. Hemispheric processing was inferred from the pattern of lateralized and generalized interference between the tasks. No support was found for the age-of-acquisition hypothesis. Instead, the data indicated a language-specific effect. Regardless of age of acquisition and of whether the first language was English or French, bilingual subjects showed lateralized interference effects consistent with left-hemisphere processing when reading in English and translating from French into English, but no lateralized interference when reading in French and translating from English into French. Whether this effect reflects characteristics of the two languages or the influence of social factors in subject-experimenter interaction is considered.     

Decreases in simple reaction time as a function of stutterers'' participation in a behavioral therapy

Stutterers and fluent speakers were compared on a simple reastion time task to determine whether participation in a behaviorally based stuttering program had an effect on clients' reaction time scores. A group of fluent speakers was used to control the possibility that any changes in reaction time latency were due to practice or familiarity with the task. All participants responded with a finger-lift as quickly as possible to 25 visual stimuli presented by computer. Response latencies from the stutterers and the fluent speakers were compared. Stutterers' posttherapy reaction time latencies were significantly shorter than their pretherapy latencies. It was also observed that stutterers' reaction time scores prior to therapy did not differ significantly from fluent speakers' scores. However, stutterers' posttherapy reaction time scores did differ significantly from fluent speakers' posttest scores. The results are discussed in terms of arousal, motivation, familiarity with the environment, conditioned inhibition, and two aspects of therapy.     

A family therapy workshop: a review of a two-year experiment in a Social Services Department

As family therapy ceases to be regarded as a passing fashion, and becomes recognized as a real therapeutic force, the need for new forms of support and supervision is becoming ever more apparent. This paper describes and evaluates the supervisory system for family therapy set up by an Area Group in a Local Authority Social Services Department and plans to do so in a way which has practical application for workers in a variety of settings.     

Methylphenidate and cognitive flexibility: Dissociated dose effects in hyperactive children

A randomized, double-blind, placebo-controlled trial was conducted to assess the acute effects of placebo and three doses of methylphenidate (MPH) (0.3, 0.6, 0.9 mg/kg) on cognitive flexibility and overt behavior in 28 children with a confirmed diagnosis of attention deficit-hyperactivity disorder. Two underlying cognitive processes (response inhibition and response reengagement) were assessed by measuring the probability and speed with which subjects could inhibit responses to a primary task (forced-choice letter discrimination) and immediately execute a response to a secondary task (simple reaction time) when given a signal to do so. Results indicated that MPH enhanced cognitive flexibility, although the high dose was less effective than lower doses in enhancing response inhibition. Dissociations of dose effects on cognitive function and behavior were demonstrated: Dose-response functions for changes in behavior were linear, whereas the function for response inhibition was U-shaped. Findings argue against the typical clinical practice of determining the response to stimulant treatment from a single measure such as parent report of child behavior.     

Approximating maximum test validity by a non-parametric method

The Gleser-DuBois conditions for selecting from a number of test items those which will maximize the correlation between total test score and criterion will degenerate into expressions requiring only item counts on total distributions and the upper halves of distributions. A grouping convention for scores near medians is recommended. The inefficiency of the method is easily compensated for, because, regardless of the size of the sample, only standard test-scoring equipment and brief computations are required. A procedure is outlined, and some applications are discussed.     

Retroactive raising of a sensory threshold by a contralateral stimulus

In an experiment designed to extend Howarth and Treisman's recent observations on the lowering of the visual and auditory threshold produced by a warning stimulus, it has been found that the threshold to electrical stimulation of one forearm is raised by a similar stimulus on the other forearm. As in the earlier experiments the “warning” was effective if it came 100 millisec. before or after the threshold stimulus. The effect increased with increasing warning strength over the range of five near-threshold strengths used.

These results appear to be inconsistent with the explanation previously proposed to account for the retroactive lowering of threshold. This suggested that the warning was acting simply as a marker, reducing the subject's uncertainty as to when the stimulus was coming. The fact that the rise in threshold was also induced retroactively shows that some interaction must be occurring in the central processes concerned in perception, and that it cannot be explained in terms of attenuation of the afferent volley.     

The stability of binocular rivalry during spaced and massed viewing

Attention, Perception, & Psychophysics - The purpose of the study was consideration of the stability of binocular rivalry rates during extended periods of spaced and massed viewing by untrained...     

Ethical Costs and Economic Costs

Studies in Philosophy and Education -     

Proof Paradoxes,Agency, and Stereotyping

Many have attempted to justify various courts’ position that bare or naked statistical evidence is not sufficient for findings of liability. I provide a particular explanation by examining a different, but related, issue about when and why stereotyping is wrong. One natural explanation of wrongness of stereotyping appeals to agency. However, this has been scrutinised. In this paper, I argue that we should broaden our understanding of when and how our agency can be undermined. In particular, I argue that when we take seriously that our agency is exercised in the social world, we can see that stereotyping can and does undermine our agency by fixing the social meaning of our choices and actions as well as by reducing the quality and the kinds of choices that are available to us. Although this improves the agency-based explanation, it must be noted that undermining agency is not an overriding reason against stereotyping. Much depends on the balance of reasons that take into account moral stakes involved in a case of stereotyping. This results in a messier picture of when and why stereotyping is wrong, but I argue that this is a feature, not a bug. I end by applying this agency-based explanation to cases that have motivated the so-called Proof Paradoxes.     

Dancing is belonging! How social networks mediate the effect of a dance intervention on students' sense of belonging to their classroom

What does it take to feel you belong? Using a sample of 606 students in 30 classrooms, with 15 classrooms participating in a school‐based dance intervention, we examined intrapsychic and extrapsychic sources of social belonging using social network analysis. Whereas outdegree (the number of outgoing liking nominations to classmates) served as a proxy variable for students' active acceptance of others, indegree (the number of ingoing liking nominations from other peers) served as a proxy variable for the passive acceptance by others. Both measures should account for changes in students' sense of belonging to their classroom. Multilevel longitudinal mediation analyses supported our predictions—increased belonging related to increasing acceptance by others and of others, which were experienced by students participating in the dance intervention for a year (vs. a non‐treated control group). We discuss our findings within the current debate on the use of distal variables to explain intrapsychic constructs.