Picture Naming Deficits in Developmental Dyslexia: The Phonological Representations Hypothesis

The picture and word naming performance of developmental dyslexics was compared to the picture and word naming performance of non-dyslexic (“garden variety”) poor readers, reading age, and chronological age-matched controls. The stimulus list used for both tasks was systematically manipulated for word length and word frequency. In order to examine picture naming errors in more depth, an object name recognition test assessed each subject's vocabulary knowledge of those names which they were unable to spontaneously label in the picture naming task. Findings indicated that the dyslexic and the garden variety poor readers exhibited a picture naming deficit relative to both chronological and reading age-matched controls. Findings also indicated that both groups of impaired readers obtained superior scores in the word naming task than in the picture naming task, while both groups of controls showed no difference in performance across tasks. The dyslexics' picture naming errors, but not those of the garden variety poor readers, were particularly marked on polysyllabic and/or low frequency words, indicating a possible phonological basis to the picture naming deficit of the dyslexic children. These children also recognized significantly more unnamed target words than all comparison groups, suggesting a particular difficulty inretrievingthe phonological codes of known picture names rather than a vocabulary deficit. Results are discussed in terms of dyslexics' difficulty in encoding full segmental phonological representations of names in long-term memory and/or in processing these representations in order to generate required names on demand.     

The Costs of Type B Behavior: Females at Risk in Achievement Situations'

This study investigated the costs associated with the Type B behavior pattern in an achievement task completed by 84 male and female fifth- and sixth-grade students preselected for their Type A-B scores. We hypothesized that the achievement behaviors of Type B girls, in comparison to boys and Type A girls, would be most negatively affected by failure experiences. Hypothesis-testing strategies were assessed during a discrimination task that included eight training, four forced failure, and four success problems. Self-ratings of performance were obtained following failure and success experiences, and preference for challenge was measured. As expected. Type B girls in comparison to all other children showed the greatest decrement in their hypothesis-testing strategies during failure, appeared to have the most difficulty recovering from failure, were the only group to view their performance following success as poorer than other children's performance, and exhibited the least preference for challenge. These findings suggest that Type B girls are at risk in achievement situations.     

A delivery system for the treatment of primary enuresis

To illustrate how to deliver underutilized psychological treatments, a comprehensive, low-cost treatment for primary enuresis was developed consisting of bell-and-pad training, cleanliness training, retention control, and overlearning. Sixty primary enuretic children and their parents attended 1-hour group training sessions and implemented treatment in the home. Each case required 15 minutes of professional time, and net cost to each family was $50. Forty-eight (81%) achieved initial arrest of bedwetting and only 11 (24%) relapsed at 1-year follow-up. Significant association between relapse and prior treatment failure with imipramine was noted. The outcome was found to compare favorably with previous treatments that required more professional time.     

EFFECTS OF PICTURE PROMPTS ON THE ACQUISITION OF COMPLEX VOCATIONAL TASKS BY MENTALLY RETARDED ADOLESCENTS

The effects of using picture prompts on the acquisition, generalization, and maintenance of complex vocational tasks were evaluated within a multiple baseline design across subjects and tasks. Five moderately and severely mentally retarded adolescents were first trained to use picture prompts to guide their performance on one or more complex tasks. Following training, posttesting with and without the picture prompts was conducted to evaluate the effects of training and to determine maintenance effects over a 2- to 4-week interval. Generalization of performance across tasks was assessed with three of the students who were provided novel tasks (with and without picture prompts) without training. Results indicated that picture prompts can be successfully used to promote both acquisition and generalization of performance, and that subsequent training time on a novel task was reduced when the use of picture prompts had been previously trained.     

Asymmetry of perception in free viewing of chimeric faces

We have devised a new free-vision task to index functional cerebral asymmetry for processing facial characteristics. Confirming its sensitivity to properties of lateralized hemispheric functions, left- and right-handers were clearly differentiated on this task with respect to several aspects of performance that conform with known differences between handedness groups in hemispheric asymmetry. Additionally, there were highly reliable and stable individual differences in perceptual asymmetries within handedness. Analyses of items in the task revealed that most of the differences between items in the asymmetries they elicited were random.     

The reward value of peers

Sixteen socially isolate preschoolers were classified as peer- or non-peer-oriented on the basis of their responses to a test devised to measure the reward value of peers. Half of the subjects in each classification were assigned to a modeling treatment and viewed a film depicting appropriate social behavior in the nursery school; half served as controls and saw an animal film. Peer-oriented modeling film subjects increased significantly more in their peer social interactions at posttest and follow-up assessments than did the non-peer-oriented modeling group. In addition, both peer-oriented and non-peer-oriented modeling groups were significantly higher on peer interaction than the control groups. Alternative and supplemental procedures for increasing isolate preschoolers' social interaction are discussed.     

False physiological feedback and emotion: Experimenter demand and salience effects

Four experiments examined the hypothesis that the Valins (1966) false physiological feedback effect with attractiveness ratings of slides is due to experimenter demand. Experiments 1 and 2 showed significant feedback effects with 5-sec feedback periods, previously reported by Barefoot and Straub (1971) to be too brief a time to search the slides for a cause of the apparent physiological arousal. Experiments 3 and 4 had 17 variations of instructions (emotional, nonemotional), stimuli (slides of people, scenic tourist slides), and type of feedback information (heart rate, eyeblink, or none). The typical false feedback effect was found under many conditions that did not seem to meet the presumptive attributional requirements for the effect. In Experiment 4, only subjects who said they were supposed to rate feedback slides higher showed the effect, regardless of instructions, stimuli, or type of feedback. The overall results are interpreted in terms of experimenter demand and stimulus salience effects.     

A comparison of the efficiency and accuracy of BILOG and LOGIST

Comparisons are made between BILOG version 2.2 and LOGIST 5.0 Version 2.5 in estimating the item parameters, traits, item characteristic functions (ICFs), and test characteristic functions (TCFs) for the three-parameter logistic model. Data analyzed are simulated item responses for 1000 simulees and one 10-item test, four 20-item tests, and four 40-item tests. LOGIST usually was faster than BILOG in producing maximum likelihood estimates. BILOG almost always produced more accurate estimates of individual item parameters. In estimating ICFs and TCFs BILOG was more accurate for the 10-item test, and the two programs were about equally accurate for the 20- and 40-item tests.I am grateful to Robert J. Mislevy, Martha L. Stocking, and Marilyn S. Wingersky for many helpful comments on an earlier version of this paper. I would also like to thank Hamid Kamrani and Bongmyoung Park for getting LOGIST and BILOG running and keeping them running under changing computer systems at CTB/McGraw-Hill.