Effect of sentence structure on stuttering

The elicited speech of 20 adult male stutterers was analyzed to determine the effect of the number, type, and location of relative clause structures on the frequency of stuttering. The selected structures were identified on the basis of transformational grammar. The findings indicate that the frequency of stuttering increases significantly with an increase in the number of relative clauses included in a matrix sentence structure. The results also indicate that the more severe the stuttering is, the more the stutterer is likely to be affected by this variable. Trends toward more frequent stuttering in the postverbal relative clause and the adjectival form of the relative clause were observed.     

The voice problems of stutterers: A practical approach from clinical experience

Voice disorders, which may be caused by the stuttering problem, have been noted in at least one-third of stutterers seen. Basically, stutterers have false speech images that normal speech is perfect and without natural dysfluencies (repetitions, pauses, etc.). Many stutterers also have erroneous vocal images of how they should or should not sound. Both images control speech and voice. Clinical experience indicates that vocal rehabilitation should be used in conjunction with speech therapy for many stutterers.     

Spatial visualization and sex differences in quantitative ability

The hypothesis that sex differences in spatial visualization ability might account for sex differences in mathematical ability was supported for a group of 183 male and 81 female college students. With spatial visualization statistically controlled, no significant sex differences in Quantitative Scholastic Aptitude Test (QSAT) scores was found; including sex as a predictor variable increased the variance explained by less than 1%. Although the slope of the regression of mathematics on spatial visualization did not differ as a function of sex, males were somewhat more predictable than females. As the OSAT of both males and females high on spatial visualization was more predictable than the QSAT of those scoring less well, it appears that the sex difference in predictability is due to males having higher spatial ability than females.     

Piagetian tasks measure intelligence and intelligence tests assess cognitive development: A reanalysis

A reanalysis of the intercorrelations of Wechsler subtests, achievements tests, and Piagetian tasks originally published by Stephens et al. (1972) has corrected errors in the original design and has used models which allow both differences and similarities to appear. Unit weighted composites of the two sets of tests were formed after first partialling chronological age out of the complete table of intercorrelations. The correlation between the composites is .876 which corrects, using split-half estimates of reliabilities, to .918. Next the matrix of partial correlations was factored and the factors rotated to a hierarchical structure. Piagetian tasks contribute almost equally to the definition of the general factor in intelligence along with the Wechsler subtests and the achievement tests. The general factor, furthermore, makes the single largest contribution to the variance of most of the measures of both sets. The smaller group factors consist of an Academic Achievement factor and three Piagetian factors. Of the latter the largest and most clearly identified is the factor called Operational Thought in the earlier analysis, but is here described simply as Conservation. It is concluded that the evidence for communality in function far outweighs the differences between intelligence tests and Piagetian tasks.     

Depression: avoidance learning and physiological correlates in clinical and analog populations

The behavioral and physiological components of depression were investigated in two experiments comparing eight student and seven non-student depressed females with an equal number of students and non-student controls on avoidance tasks and electrodermal responsivity to an aversive audiotape. Avoidance behavior was assessed in both active and passive paradigms where the correct response or response suppression, respectively, function to avoid a noxious buzzer. Physiological activity and reactivity were compared using measurements of skin resistance level and SRR fluctuations during resting and aversive tape periods. It was found that the depressed groups showed inferior active and superior passive avoidance learning as compared to controls. Depressed subjects were also more emotionally responsive (showed a greater number of SRR) during presentation of the audiotape. A passive avoidance model for depression is suggested for the explanation of the phenomena observed. A distinct difference was also found between student and non-student populations. The utility of college student analogs for depression is questioned.     

Parallel function strategy in pronoun assignment

Subjects completed sentences of the form NP1 aux V NP2 because (but) Pro … (e.g., John may scold Bill because he …) with a reason or motive for the action described. A basic perceptual strategy was hypothesized to underlie the comprehension of these sentences which have a potentially ambiguous pronoun in the subject position of the subordinate clause. It was expected that listeners would interpret the pronoun as being coreferential with the subject NP of the main clause, the NP with the same grammatical function. While this strategy accounted for the major share of the results, semantic factors restricted its use, establishing an interpretation in which the pronoun was coreferential with the object NP of the main clause.     

How shall we study individual differences in cognitive abilities?—Methodological and theoretical perspectives

Selected studies in recent research literature are examined with regard to (a) their methodological adequacy in establishing dimensions of individual differences in information-processing abilities, and (b) the theoretical problems involved in inferring psychological processes from individual difference dimensions. Many methodological inadequacies are noted, including use of small Ns, questionable procedures in establishing variables (e.g., use of raw difference scores), improper or inadequate use of factor analysis and other multivariate statistical techniques, and poor presentation of results. On the whole, little progress has been made thus far in identifying psychological processes through research in individual differences, even though this research approach is viable and potentially useful. Serious theoretical difficulties arise in attempting to infer the nature and operation of psychological processes merely from the identification of individual difference trait dimensions. Promising research, however, is represented by studies in which an effort is made to analyze tasks into their components, to vary task characteristics, and/or to consider the strategies that individuals can employ in performing the tasks.     

Creativity: A complementary relationship between information demand and success at problem solving

Creativity, intelligence, and problem-solving tasks that varied the explicitness of problem definition and the format for an acceptable solution were administered to 100 subjects. Creativity and intelligence tasks were described as different problem-solving tasks. Two hypotheses that distinguished between concepts of creative and intelligent problem solving were presented and supported. First, the syntactical hypothesis stated that the format of an acceptable solution would define the factor structure of the problem-solving tasks more parsimoniously than the explicitness of the problem definition. The factor structure was interpreted by the type of acceptable solution format. Second, the strategic hypothesis stated that information demanded to define a problem and success at problem solving would interact. Information demanded and success at problem solving did interact producing a complementary relationship with dimensions of creativity but not intelligence. Thus, syntactical and strategic distinctions between creativity and intelligence were obtained.     

Relevance of genotype and its environmental counterpart to the theory,interpretation, and nomenclature of ability measures

While the constructs of aplitude and achievement, which are here defined as genotypic and environmental constructs, are potentially useful in psychological theory and in the development of predictors and weights for predictors, the use of these terms for psychological tests is highly misleading. When used for tests, the terms lead to invalid inferences concerning the constructs and to erroneous predictions of later criteria. All psychological tests measure current performance levels which are phenotypic characteristics. Practically all such tests can be used to estimate both genotypic and environmental constructs with nonzero accuracy. The basic error is to use a term which denotes a genetic or an environmental construct for a phenotypic measure. Implications of this position for inferences concerning group differences in aptitude and for construct validity of tests are briefly discussed.     

Middle-class adults'' knowledge of referral sources for problems of vision, dentition, reading, stuttering, and articulation

A survey of 40 middle-class adults representing four age groups 10 yrs apart was conducted to determine to whom they would refer children with problems involving vision, dentition, reading, stuttering, and articulation. Results indicate that the adults were well informed with respect to referral sources for treatment of vision and dentition but inconsistencies were noted in choosing referral sources for reading, articulation, and especially stuttering. Implications of these findings are discussed.