Closed- and open-class lexical access in agrammatic and fluent aphasics

Bradley, Garrett, and Zurif (Bradley, Computational distinctions of vocabulary type. Unpublished doctoral dissertation, MIT Press; Cambridge, MA, 1978; Biological studies of mental processes, MIT Press, Cambridge, MA, 1980) have suggested that closed-class word access is normally mediated by a different route than the open-class one, and that the loss of this closed-class route might account for agrammatism. However, in an earlier study ( Gordon & Caramazza, Brain and Language, 15, 143–160, 1982) we were not able to confirm a meaningful difference between closed- and open-class word frequency responsiveness of the type Bradley (unpublished dissertation, 1978) had seemed to find in normal subjects. We have now done a direct comparison of closed-class frequency sensitivity in agrammatic and nonagrammatic aphasics, to directly test Bradley and colleagues' hypotheses and to avoid some of the experimental problems with between-class frequency comparisons. We find that closed-class words behave similarly whether or not the subject is agrammatic. Therefore, the differences between agrammatic and nonagrammatic aphasics must arise at a deeper level (or levels) of lexical processing than the one probed by the frequency sensitivity effect.     

Images of engineering and liberal arts majors

In an attempt to gain insight into social-psychological barriers that inhibit women from entering engineering, 110 male and 84 female undergraduate students completed a variant of the Semantic Differential questionnaire. Subjects evaluated either male or female liberal arts and engineering majors. While female engineering majors were judged similar to male engineers on work-related traits, they were evaluated as less attractive than their female liberal arts counterparts. In particular, the data revealed reciprocal negative social images held by male engineering students for female engineers and by female engineering students for male engineers.     

A self-efficacy approach to the career development of women

An approach to the conceptualization and facilitation of women's career development based on Bandura, 1977, Bandura, 1977, 84, 191–215) self-efficacy theory is presented. The model presented postulates that largely as a result of socialization experiences, women lack strong expectations of personal efficacy in relationship to many career-related behaviors and, thus, fail to fully realize their capabilities and talents in career pursuits. Sex differences in the access to and availability of four sources of information important to the development of strong expectations of personal efficacy are reviewed and discussed in relationship to women's career decisions and achievements. The utility of the proposed model for integrating existing knowledge of women's career development, for generating productive avenues of inquiry, and for guiding intervention efforts is discussed. The conceptual framework provided is seen as having implications for the career development of men as well as women, but the focus herein is on its potential for contributing to knowledge of the career development of women.     

Disfluent speech associated with brain damage

The frequency and type of disfluencies in the spontaneous speech of 15 people with Broca's aphasia and right hemiplegia was studied. Two aged-matched control groups (15 nonaphasic stroke patients with left hemiplegia and 15 normals) were also studied. The frequency of disfluencies in the speech of aphasics was three times greater than that in the speech of either control group. However, most of the disfluencies uttered by aphasics were of the types commonly found in speech of normals.     

Vocal and nonvocal discriminative performance in monkeys

Discriminative performance of a lever press and a vocal call was compared in five macaques. The animals exhibited similar scores for Response Rate, Efficiency, and Error Index. Total vocal responses were slightly higher than total lever responses. Latency for vocal responses was significantly greater than lever press. Similar scores in measures of performance of the two behaviors indicate that discriminative vocalization is not exceedingly difficult. Failure by others to achieve discriminative vocalization in studies employing weak positive-reinforcement contingencies suggest that certain experimental paradigms are unsatisfactory for vocal conditioning.     

Intersensory substitution in the blind

This study looks at the implications for theories of development of an intersensory surrogate for the blind—the Sonicguide. Results of both short- and longterm studies suggest that there is a critical age, before which use of the Sonicguide is qualitatively more effective than attempts at intervention begun after this age. Similarly the young infants in the sample show a much more rapid acquisition of ability to use the guide effectively. The importance of such results for theories of perceptual development is discussed.     

A mental-health locus of control scale

The purpose of this study was to develop and seek initial validation of a mental- health locus of control scale. Twenty-six mental-health professionals rated each of the 14 statements of a previously-designed mental-health service request form along a 5-point locus of control scale. Six of the 14 items met the study's criteria for inclusion in the mental-health locus of control scale. Discriminant validity of the scale was provided by a study demonstrating that psychotic patients were more external in their perceived locus of control than were a nonpsychotic patient comparison group. Other validation studies and research are suggested.