A study of alpha hemispheric asymmetries for verbal and nonverbal stimuli in males and females

The alpha hemispheric asymmetries of males and females were examined with electroencephalographic (EEG) techniques during exposure to connected speech and nonlinguistic stimuli. The subject selection controlled for familial handedness and each subject was administered the Block Design and Vocabulary Subtests of the WAIS as a general measure of “visual-spatial” and “verbal” ability. The results showed that there was less alpha in the right hemisphere for nonverbal tasks and less alpha in the left hemisphere for verbal tasks. The females showed significantly more “lateralization” during the tasks as compared to the males. The results are discussed in terms of processing differences and the possible effects of subject variables, stimulus mode, stimulus presentation, and task requirements on neurolinguistic research results.     

Comparison of student and recruiter values

Value priorities of campus employment recruiters and senior liberal arts students were compared using Rokeach's Value Survey. Three hypotheses were confirmed: (1) Significant differences were found between groups' rankings of values. Students ranked idealistic values high, while recruiters ranked values applicable to business near the top. (2) A greater number of significant differences were found among instrumental values than among terminal values. (3) Regardless of the sex of the applicants, recruiters chose applicants expressing masculine rather than feminine values.     

Structural influences on organizational commitment

Relationships of several aspects of organization structure with organizational commitment were examined within a multiple regression framework for 262 public sector employees. As a set, the six structural variables accounted for over 20% (p < .001) of the variation in organizational commitment for the vocationally heterogeneous sample studied. Overall, these results suggest that future model-building efforts should take organization structure into account as one potentially important dimension of influences on organizational commitment.     

On being imitated: Effects on models and observers

Forty first- and second-grade children were imitated by an adult confederate and not imitated by a second adult confederate. For each child exposed to the above treatment, another child observed the imitation and nonimitation. It was found that children tended to be attracted to the confederate who imitated them. More importantly, although the observers were not imitated, they also were attracted to the imitating confederate. The two groups did not differ significantly in subsequent imitation of the two confederates. The results, which were conceptualized within the framework of vicarious reinforcement, have methodological implications for research on the effects of being imitated.     

Three experiences affecting spatial discrimination learning by ambulatory children

Children 1 and 3 years of age were given a two-choice spatial discrimination task. They were placed in front of a barrier and encouraged to walk around it; one route around the barrier was blocked. Three experiments studied the effects of different types of experience with this spatial problem. The first examined trial and error experience, in which the child was allowed to walk the route he or she had chosen. Although most children readily learned to choose the open route, the pattern of choices indicated that 3-year-olds were more likely to achieve a learning criterion after an error than 1-year-olds. A second experiment looked at the effects of showing the children the layout of the problem prior to trial and error experience. The 3-year-olds were again more likely than the 1-year-olds to achieve criterion after an error; furthermore, they were likely to know the correct route on the first trial. The third experiment let the children watch their parents take the correct route. This procedure eliminated age differences in performance. The initial choices of the 1-year-olds indicated that they were likely to know the correct route, and if they did not, they were just as likely to learn from their mistakes as the 3-year-olds. The data were interpreted within a mathematical model of learning. Based upon these analyses, we propose two developmental trends. One involves a growth in sensitivity to the consequences of a choice of route. The other is a progression from social learning to more independent and ideational methods of spatial problem solving.     

What young children think you see when their eyes are closed

The common assumption that young children egocentrically believe you cannot see them when their own eyes are closed was investigated in two studies. It was found that 2.5-4-year-olds, but not 5-year-olds and adults, would indeed often give negative reply to the experimenter's question “Do I see you?” when their eyes were closed and covered with their hands. However, they would also correctly reply that the experimenter did see their arm and an object placed in front of them and did not see their eyes and back, indicating that they were making veridical, nonegocentric inferences about the experimenter's visual experience. In addition, their eyes being visible to the experimenter did not prove to be either a necessary or a sufficient condition for their judgment that the experimenter could see “them” (“you”). It was concluded that, in this context, adults take “you” to mean their whole body while young children take it to mean primarily their face region. Speculations were made as to how young children could have acquired this meaning, and about possible similarities and differences between the self conceptions of young children and adults.     

Sequences of phonemic approximations in aphasia

The trends of sequences of phonemic approximations to a single target were studied in three types of aphasia (Broca's, conduction, and Wernicke's), as gathered in five tasks (spontaneous speech, repetition of meaningful words, repetition of nonsense words, reading aloud, and automatized sequences). A phonemic error ratio was defined in order to quantify the distance between each approximation of a given sequence and its target. The results of a computer analysis based on this ratio were analyzed according to three parameters. A study of three types of patients revealed that conduction aphasics exhibited the most regular trend toward the target in sequences of phonemic approximations; the analysis of the various tasks indicated that sequences produced in repetition by conduction aphasics form an exception to the regularity of this trend, and an examination of the various lengths of sequences indicated that longer sequences showed a less decisive trend toward the target than shorter sequences. The discussion bears on some theoretical aspects of the phonological production mechanism and its control: the initial strength and permanence of the internal representation of the target emerge as important factors required for the good functioning of this mechanism.     

The relevance of DAF-induced speech disruption to the understanding of stuttering

The literature on delayed auditory feedback (DAF) repeatedly makes reference to the occurence of disfluencies under DAF in nonstutterers. However, no attempt has been made to determine the relative frequency of occurence of various types of disfluencies in nonstutterers under DAF. The present study investigated the frequency of occurence of various types of disfluencies in normal-speaking subjects in five successive oral readings under DAF. Twenty-four young adults read aloud a prose passage five times successively under 200 msec of bilateral DAF. Measures of the frequency of different types of disfluencies, locus of occurence of disfluencies in the speech sample, adaptation and consistency indicate that DAF-induced disfluencies are remarkably similar to those found in stuttering. It is suggested that DAF and stuttering disrupt speech at approximately the same “level” along the speech production process, possibly at the prosodic level.     

Physically disabled students and achievement orientation: Self-concept,curriculum track,and career aspirations

Little research has been done on the vocational mobility of physically disabled students (Overs, R. In J. S. Picou and R. E. Campbell (Eds.), Career behavior of special groups. Columbus, Ohio: Charles E. Merrill, pp. 177–198). A subset of data from a larger investigation on the achievement processes of youth was analyzed in two phases to describe disabled and nondisabled tenth-grade students on certain sociodemographic variables, high school curriculum track assignment, self-concept dimensions, and educational and occupational aspirations. Additionally, a process model specifying the presence or absence of physical handicaps as an ascribed status was analyzed using path analysis. Results suggest that students who report themselves as being physically disabled are not from specific social origins or differentially allocated to curriculum tracks; more importantly, they do not hold different physical or social self-conceptions or career aspirations. The multivariate analysis shows that disabled status is a significant antecedent only to academic self-concept, having a moderate, positive effect. This finding was interpreted as being a possible “overcompensation” in one particular field when there is a weakness in another. The lack of expected differences in other variables is also discussed.