The Halstead Category Test: A Fifty Year Perspective

The Category Test, a major part of the Halstead-Reitan Neuropsychological Battery, was first described in a 1943 article by Halstead and Settlage. This paper reviews the development of the test, the psychometric properties of the instrument, available administration and scoring methods, discusses various interpretative strategies, and the empirical support for the test's clinical validity. Recent developments are then reviewed, as well as what the authors see as the future potential for this instrument.     

Bilateral Ablation of Auditory Cortex in Mongolian Gerbil Affects Discrimination of Frequency Modulated Tones but not of Pure Tones

This study examines the role of auditory cortex in the Mongolian gerbil in differential conditioning to pure tones and to linearly frequency-modulated (FM) tones by analyzing the effects of bilateral auditory cortex ablation. Learning behavior and performance were studied in a GO/NO-GO task aiming at avoidance of a mild foot shock by crossing a hurdle in a two-way shuttle box. Hurdle crossing as the conditioned response to the reinforced stimulus (CR+), as false alarm in response to the unreinforced stimulus (CR−), intertrial activity, and reaction times were monitored. The analysis revealed no effects of lesion on pure tone discrimination but impairment of FM tone discrimination. In the latter case lesion effects were dependent on timing of lesion relative to FM tone discrimination training. Lesions before training in naive animals led to a reduced CR+ rate and had no effect on CR− rate. Lesions in pretrained animals led to an increased CR− rate without effects on the CR+ rate. The results suggest that auditory cortex plays a more critical role in discrimination of FM tones than in discrimination of pure tones. The different lesion effects on FM tone discrimination before and after training are compatible with both the hypothesis of a purely sensory deficit in FM tone processing and the hypothesis of a differential involvement of auditory cortex in acquisition and retention, respectively.     

Roommate Compatibility: Is There An Ideal Relationship?1

Three theories of interpersonal attraction were tested for their ability to predict roommates' compatibility. The similarity hypothesis (that we are attracted to and compatible with people who are similar to our self-concepts) received moderate support; the social desirability hypothesis (that we are attracted to and compatible with people who possess socially desirable traits) received scant support. The ideal hypothesis (that we are attracted to and compatible with people who are similar to our ideals) received strong support. The utility of these theories in terms of preinteractionally matching students in order to maximize compatibility was found to be minimal because it could not be assumed that students peiceive their roommates in the same manner as their roommates perceive themselves.     

Longitudinal electromyography findings in abstinent alcoholics

Polyneuropathies by long term alcohol dependent Patients are characterized by "axonal" and "demyelinized" type. By abstinence we found a diminution of symptoms.     

Syntactic loss versus processing deficit: an assessment of two theories of agrammatism and syntactic comprehension deficits

This research evaluated Grodzinsky's (1984, 1986a) syntactic loss and Kolk and van Grunsven's (1985) working memory impairment explanations of syntactic comprehension deficits in agrammatic aphasics. Four aphasic patients were evaluated who showed different patterns of impairment on morphological and structural aspects of production. The comprehension tasks compared performance on full and truncated passive sentences. The syntactic loss hypothesis predicted worse performance on truncated than full passives, while the working memory deficit hypothesis predicted the reverse. Neither hypothesis was supported, as the patients performed at a similar level on both types of passives. In addition, there was little relation between the patients' production indices and their comprehension level. The results argue against any global theory of agrammatism that attempts to attribute all agrammatic speech and co-occurring syntactic comprehension deficits to the same source.     

Preferences as expectation-driven inferences: effects of affective expectations on affective experience

Presents a model arguing that affect and emotion are often formed in an expectation-driven fashion. A pilot study and 2 experiments manipulated undergraduate Ss' affective expectations (e.g., how funny they expected a set of cartoons to be) and whether Ss' expectations were confirmed (e.g., whether the cartoons really were funny). When the value of a stimulus was consistent with an affective expectation, people formed evaluations relatively quickly. Even when the value of a stimulus was discrepant from an affective expectation, people sometimes assimilated the value of the stimulus to their expectations. Other times, such as when making a more fine-grained evaluation of the cartoons, people noticed that they were discrepant from their affective expectations. Under these conditions, people appeared to have more difficulty forming preferences. They took longer to evaluate and spent more time thinking about the cartoons.     

Consequences of a Motor Programming Deficit for Rehearsal and Written Sentence Comprehension

The role of central motor processes in rehearsal was investigated by studying a braindamaged patient with a severe articulatory impairment. Evidence is presented that his articulatory impairment is due to a disruption of motor programming rather than to peripheral muscle weakness. Despite his motor programming deficit, the patient showed normal auditory span and evidence of rehearsal for auditorily presented sequences of words. For visual presentation, span was reduced and there was no evidence of rehearsal. Also, the patient showed excellent sentence comprehension for syntactically complex sentences for both auditory and visual presentation. The results imply that central motor processes are not critical for normal short-term memory, at least for auditory presentation, and that reading comprehension does not depend on inner rehearsal.     

Are alcoholic polyneuropathies reversible?

Polyneuropathies by long term alcohol dependent patients are characterized by symmetric distal type of manifestation. By abstinence we found a diminution of symptoms. It is a point of view for treatment and diagnostic.     

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Philosophical Studies -