Learning from negative outcomes in stuttering therapy: II. An epiphany of failures

Proceeding on the premise that learning advances on the feet of failure, a litany of therapeutic failures with stutterers across 3 decades is recounted. The basis for these failures included the assumptions that stuttering is a neurotic symptom; that “lucky fluency” can be maintained permanently; that a fluent drone is preferable to stuttering; that controlled fluency, once established, can be maintained permanently; that a proper task for clinicians is to motivate clients to achieve and preserve fluency; that the clinician has the responsibility for marching clients through their therapeutic paces; and that stuttering is punishing to the stutterer, so it is not preserved by reinforcement. Unfortunately, more has probably been learned about what does not work than what does.     

Language loss in bilingual Chicano children

The results of two studies on language loss in bilingual Chicano children are reported. In Study I, focusing on normal language acquisition in balanced bilinguals, 41 children in kindergarten through fourth grade were administered the Bilingual Language Acquisition Scale (BLAS), an instrument testing comprehension and production of the following features: number, gender, word order, relatives, conditionals, and Spanish subjunctive and its English equivalents. Most development occurred between kindergarten and the upper grades in the English Comprehension and Production subscales. In the production of Spanish, significant differences appeared between kindergarten and the upper grades to grade three. Unexpectedly, in the fourth grade, performance dropped sharply, with children performing almost at the kindergarten level. There were no significant differences by grade in Spanish comprehension. Most significant differences among grades were produced in the more complex categories (conditionals, Spanish subjunctive/English equivalents, and relatives) in the production subscales in English and Spanish. By fourth grade, in Spanish (and sometimes by third grade), children were performing with significantly lower accuracy than the younger children, particularly in the more complex structures (subjunctive and conditionals, for example). In Study II, 32 of the original subjects were retested two years later using the same instruments and procedures. While performance in English continued to improve for the sample as a whole, performance in Spanish production deteriorated to a significant degree. In Spanish, significant differences in performance between the two administrations were found, both for the scale as a whole and for the following categories: past tense, relatives, and the subjunctive. The influence of personal history and language use patterns was tested. The most severe incidence of loss occurred among children who tended to use both English and Spanish with the same speaker.     

Caregiver behavior in center and family day care

In an effort to examine relationships between variations within day care settings and adult caregiving behaviors the social experiences of 40 toddlers and their caregivers in family and center care were systematically observed. Caregivers were interviewed and conditions of caregiving recorded. Caregivers in both settings with fewer children in their care, who worked shorter hours, with less housework responsibilities engaged in more facilitative social stimulation, expressed more positive affect, were more responsive, and less restrictive and negative. Family day care caregivers who worked in spaces specifically designed to be safe and appropriate for children were less restrictive of toddler activity. Adult-child ratio and caregiver training appeared to be the best indicators of quality care in center day care, while a safe and appropriate caregiving environment and small groups appeared as quality indicators in family day care.     

Reaction time, intelligence, and attention

The roles of attention in reaction time and in the relationships among reaction time, intelligence, and achievement were analyzed. The subjects were 105 seventh-grade children. The results were generally consistent with most studies involving the Hick paradigm: both mean reaction time and the standard deviation of reaction time correlated with the intelligence and achievement measures used. Reaction time measures were correlated with attention and perceptual speed as well as with general intelligence, or g. Implications of these results for current theories linking reaction time and intelligence are discussed.     

Divided attention: Evidence for coactivation with redundant signals

Many models of divided attention assume that signals presented on different channels produce separate activations, any one of which can initiate a response. According to these models, detection responses are especially fast when signals are presented on two channels at the same time because the system can detect a signal in either of two ways. Such models predict a testable relation among reaction time distributions for conditions in which a single signal is presented as compared with a condition in which two signals are presented, and this prediction is tested in two tasks. A bimodal detection task required a simple speeded response to either a visual or an auditory signal. A letter search task required a choice response depending on whether or not a two-letter display included the signal letter “A.” Data from both tasks are inconsistent with the prediction. When two signals are presented, responses are faster than separate-activation models can explain. The results favor “coactivation” models, in which signals presented on different channels contribute to a common pool of activation that initiates a response.     

Cerebral organization in adult second language acquisition: Is the right hemisphere more involved?

A Spanish-English dichotic listening study was designed to test the hypothesis that the right hemisphere might be more involved during the initial stages of informal, adult second language acquisition. No evidence was found in support of the hypothesis. Results are discussed within the general theoretical framework of the right hemisphere's role in second language performance and bilingualism.     

Aphasic adults' use of heuristic and structural linguistic cues for sentence analysis

Eight aphasic adults with relatively preserved auditory comprehension and 12 normal adults were tested for their ability to analyze sentences in which the functional relations between the verb and nouns was either directly reflected by word order expectancies, or marked by a functor or non-NVN word order. The subjects' task was to designate the agent of each sentence. Results indicated that aphasics utilize word order expectancies but are impaired in their ability to exploit functors and particularly, word order markers for sentence analysis. Results are discussed in terms of aphasics' use of heuristic versus structural linguistic cues for interpreting sentences.     

Hemispheric alpha asymmetries of words with positive, negative, and neutral arousal values preceding tasks of recall and recognition: Electrophysiological and behavioral results from stuttering males and nonstuttering males and females

Hemispheric alpha asymmetries were obtained for stuttering males and nonstuttering males and females for words of positive, negative, and neutral arousal values. Electroencephalographic data were gathered during the presentations of stimulus words and during the actual nonoral recall and recognition of the stimulus items. Stuttering males demonstrated right-hemispheric alpha suppression across stimulus words and tasks as contrasted with left-hemispheric alpha suppression for the nonstuttering males and females. Stuttering males were also shown to recall and recognize fewer words than the nonstuttering subjects across arousal categories. Subjects were also administered a modified version of A. Paivio's (1971, In B. Randhawa & W. Coffman, Eds., Visual thinking, learning, and communication, New York: Academic Press) Individual Differences Questionnaire (IDQ). Results showed our stuttering males to have obtained lower scores on the verbal and imagery questions of the IDQ as compared to the nonstuttering groups. Hemispheric alpha asymmetry results and memory performance from the stuttering males are discussed relative to nonsegmental, right-hemispheric processing strategies.     

Factor-derived categories of chronic aphasia

A large sample of patients with aphasia (N = 118), unselected for etiology, were administered the Porch Index of Communicative Ability more than 6 months after the onset of aphasia. Factor analysis of PICA subtest scores identified five factors which accounted for 83.9% of the total variance. The factors were labeled speaking, writing, comprehension, gesturing, and copying. Cluster analyses of the factor scores yielded five patient categories which differed in the pattern of impairment on the language factors as well as in overall severity of aphasia. A subgroup of the parent sample consisting of 52 patients with localized left-hemisphere CVA had cluster analyses repeated after having first been studied as part of the larger sample. The factor-derived categories for the subgroup were similar to those of the entire group. Discriminant functions of the PICA raw scores of the 52-patient subsample correctly classified all of the patients. When discriminant functions were based upon the factor scores of the 118-patient parent sample, 80.7% of the 52 patients were correctly classified into the five categories.