Verbal and visual instruction with mental retardation: The role of subject characteristics and task factors

Past research and theory presents an inconsistent picture concerning the relative value of verbal versus visual instructional programs for individuals with mental retardation. From an empirical perspective, there is evidence that this inconsistency may be due to the differences in the type of tasks and the specific abilities of the subjects employed across studies. In this research, the effects of three instructional procedures (verbal, visual, and verbal plus visual) were evaluated with mentally retarded persons who varied in verbal and visual ability. Performance was examined on a visual task which incorporated stimuli of varying degrees of familiarity to the subjects. The results indicated that the use of the combined verbal-visual instruction procedure was more effective than the other two training programs when task stimuli were familiar to the subjects. When task stimuli were unfamiliar, instructional procedures which had a visual component were found to be superior to a procedure which employed only the use of verbal component. The subjects' visual ability was most strongly associated with performance outcome when visual instruction was employed and unfamiliar task stimuli were sorted. In contrast, subjects' verbal ability appeared to be equally important across instructional and task conditions. The implications of the results for the design of instructional programs and for future research are discussed.     

TESTIMONY,MEMORY AND THE LIMITS OF THE A PRIORI

Philosophical Studies -     

The role of stimulus material in determining release from proactive inhibition

The release from proactive inhibition (PI) paradigm has been widely used as a technique for exploring the encoding dimensions of short-term memory for verbal items. PI release data have been used not only to infer particular memory codes but also to index their relative salience. In the present study, the effects of manipulating the colour (red or black) in which the stimulus material is printed were investigated in two separate experiments. No release effect was obtained in the first, where common two-syllable words were presented. In the second, where consonant trigrams were presented, a large effect was found. Since the same colour feature was manipulated in each experiment, it is argued that this pattern of results has serious implications for the use of PI release data as a technique for mapping the encoding dimensions of short-term memory.     

Knowledge of speaker's voice and release from proactive inhibition

This study examined the effects of monitoring speaker's voice in the Wickens' attribute shift paradigm and, in addition, subsequently measured voice retention in a recognition test. Monitoring voice appeared to enhance the release effect obtained, but neither monitoring nor shift conditions led to superior voice recognition for the final trial. These data are used to support the position that release effects are determined not so much by the registration of the critical attribute as such, but by the extent to which that attribute can be utilized in retrieving the to-be-remembered items.     

Participation in competitive amateur sports as a function of psychological androgyny

Previous research has indicated that women who participate in competitive sports tend to score low on traditional measures of femininity, and such women have been characterized as masculine (Harris, 1975). These studies used the Bem Sex Role Inventory (BSRI; Bem, 1974) to measure the degree of sex-typing in 25 male and 23 female competitors in a national racquetball tournament and 24 male and 27 female competitors in local badminton, squash, and handball tournaments. Results for the first study indicated that a larger percentage of androgynous women as compared to traditionally feminine or masculine women entered the racquetball tournament, whereas the largest percentage of male entrants were in the masculine role category. Results for the second study indicated that among contestants who cited a competitive reason for entering the tournament, a larger percentage of both men and women were sex-typed as androgynous or masculine rather than feminine. These results were subsequently reanalyzed according to an alternate procedure suggested by Bem (1977) in order to compare the behavior of subjects who score high on both masculinity and femininity and those who scored low on both. While the percentages of masculine, feminine, and androgynous subjects were changed by the new categorization procedure, there were no differences found between high—high and low—low scorers. Implications of these results for the traditional characterization of women participants in competitive sports and for the usefulness of the BSRI in predicting nonlaboratory behavior are discussed.Portions of this article are based on an honors thesis submitted by the senior author to the University of Winnipeg. The authors are indebted to Stephen Davis and Wayne Andrew for their comments on the data analysis and their constructive criticisms of an earlier draft of this article.     

Multiple processes in prospective memory retrieval: factors determining monitoring versus spontaneous retrieval

Theoretically, prospective memory retrieval can be accomplished either by controlled monitoring of the environment for a target event or by a more reflexive process that spontaneously responds to the presence of a target event. These views were evaluated in Experiments 1-4 by examining whether performing a prospective memory task produced costs on the speed of performing the ongoing task. In Experiment 5, the authors directly tested for the existence of spontaneous retrieval. The results supported the multiprocess theory (M. A. McDaniel & G. O. Einstein, 2000) predictions that (a) spontaneous retrieval can occur and can support good prospective memory and (b) depending on task demands and individual differences, people rely to different degrees on monitoring versus spontaneous retrieval for prospective remembering.     

Body Dysmorphic Symptoms,Functional Impairment,and Depression: The Role of Appearance-Based Teasing

Body dysmorphic disorder is associated with elevated social and occupational impairment and comorbid depression, but research on risk factors for body dysmorphic symptoms and associated outcomes is limited. Appearance-based teasing may be a potential risk factor. To examine the specificity of this factor, the authors assessed self-reported appearance-based teasing, body dysmorphic, and obsessive-compulsive symptom severity, functional impairment (i.e., social, occupational, family impairment), and depression in a nonclinical sample of undergraduates. As hypothesized, appearance-based teasing was positively correlated with body dysmorphic symptoms. The correlation between teasing and body dysmorphic symptoms was stronger than that between teasing and obsessive-compulsive symptom severity. Last, body dysmorphic symptom severity and appearance-based teasing interacted in predicting functional impairment and depression. Specifically, appearance-based teasing was positively associated with depression and functional impairment only in those with elevated body dysmorphic symptoms. When a similar moderation was tested with obsessive-compulsive, in place of body dysmorphic, symptom severity, the interaction was nonsignificant. Findings support theory that appearance-based teasing is a specific risk factor for body dysmorphic symptoms and associated functional impairment.