The effects of choice-making on the problem behaviors of high school students with intellectual disabilities

This investigation was conducted in an effort to systematically extend the emerging data base having to do with choice-making opportunities and the behavior of students with disabilities. In particular, the current analyses examined the effects of choice-making on the problem behavior and task engagement of three high school students with intellectual disabilities as the students performed domestic and vocational activities. Multiple baseline and reversal designs demonstrated that the choice conditions reduced problem behaviors and increased task engagement for all participants. Data having to do with student affect and task productivity were less consistent. The findings on the relationship between choice making and problem behavior replicate and extend a growing literature on the desirable effects of choice-making for individuals with disabilities. The results are discussed in terms of recent developments in behavioral support, as well as the need for ongoing conceptual and applied research.     

HOME ACCESS MODIFICATIONS: EFFECTS ON COMMUNITY VISITS BY PEOPLE WITH PHYSICAL DISABILITIES

We examined the effects of access modifications to home entrances of people with physical disabilities on their reported community outings. An interrupted time-series design was used, in which the introduction of ramps was staggered across the homes of 6 people with moderate to severe mobility impairments. Four participants reported increases in weekly outings following installation of ramps at their entrances, and 2 reported a small decrease. These findings suggest that reducing the response requirements of access to and from the residence of people with mobility impairments may increase community visits, but may be insufficient given other environmental barriers in the community.     

Adult attachment style and vulnerability to depression

The present study examined the role of adult attachment styles in differentiating ‘depressed’ and ‘non-depressed’ college students, and the association between attachment styles and the depressive personality vulnerabilities, sociotropy and autonomy. High scores on the fearful and, to a lesser extent, preoccupied attachment scales were associated with higher levels of depression, highlighting negative self-representation as a key factor in depression. While the sociotropy vulnerability construct correlated exclusively with the preoccupied attachment scale, correlations for the autonomy construct were more complex: as predicted, fearful attachment correlated with all three autonomy subscales while dismissive attachment correlated with the defensive-separation and control subscales, but not with the self-criticism subscale. With an emphasis on negative self-representation, preoccupied attachment also correlated with the self-criticism subscale. The results suggest that fearful attachment is consistent with autonomous vulnerability and preoccupied attachment with sociotropic vulnerability. Self-criticism, a component of both fearful and preoccupied attachment, is highlighted as a strong depressive vulnerability. Dismissive attachment, not involving the self-critical component, does not appear to be associated with depressive predisposition, despite involving self-reliance and avoidance of intimacy.     

Category scales of sweetness are consistent with sweetness-matching data

Category scales were obtained for the sweetness of sucrose, fructose, and glucose, with care being taken to preclude methodological bias. These category scales were then used to predict the outcome of scale-free sweetness matching with the same three sweeteners. The matching concentrations predicted from the category scales were found to agree well with those actually obtained in several sweetness-matching studies.     

MOTIVATING AUTISTIC CHILDREN THROUGH STIMULUS VARIATION

This study evaluated the differential effectiveness of two methods of presenting discrimination tasks when teaching autistic children. In a constant task condition, the common method of presenting a single task throughout a session was used. In a varied task condition, the same task was interspersed with a variety of other tasks from the children's clinic curricula. Results showed declining trends in correct responding during the constant task condition, with substantially improved and stable responding during the varied task condition. In addition, naive observers judged the children to be more enthusiastic, interested, happier, and better behaved during the varied task sessions. These results suggest that “boredom” may be a particularly important variable to control in the treatment of autistic children, and that particular care may be necessary when defining criteria for task acquisition. The results are discussed in relation to the literature on increased responsivity to stimulus novelty and variation.     

INTERTRIAL INTERVAL DURATION AND LEARNING IN AUTISTIC CHILDREN

This study investigated the influence of intertrial interval duration on the performance of autistic children during teaching situations. The children were taught under the same conditions existing in their regular programs, except that the length of time between trials was systematically manipulated. With both multiple baseline and repeated reversal designs, two lengths of intertrial interval were employed: short intervals with the S^D for any given trial presented approximately one second following the reinforcer for the previous trial versus long intervals with the S^D presented four or more seconds following the reinforcer for the previous trial. The results showed that: (1) the short intertrial intervals always produced higher levels of correct responding than the long intervals; and (2) there were improving trends in performance and rapid acquisition with the short intertrial intervals, in contrast to minimal or no change with the long intervals. The results are discussed in terms of utilizing information about child and task characteristics in terms of selecting optimal intervals. The data suggest that manipulations made between trials have a large influence on autistic children's learning.     

The sex difference in rotary pursuit performance: aptitude or inhibition?

This study examined the hypothesis that male dominance in the acquisition and performance of rotary pursuit skill reflects a lower male proclivity for the generation and accumulation of reactive inhibition rather than some innately superior ability to profit from practice. On this hypothesis, the magnitude of male dominance should decline as the length of the intertrial interval increases. The experimental sample consisted of 120 Caucasian subjects (60 of each sex) who were given sixty 30-sec trials on rotary pursuit with intertrial intervals ranging from 0 to 40 sec. The principal finding was that the magnitude of the sex difference depended significantly upon the length of the intertrial interval, as hypothesized. When the interval was 10 sec or longer, performance levels of the sexes were essentially equal. The sex variance was reduced to insignificance even on the first trial when allowance was made for the inhibitory effect of practice. Thus, male dominance in rotary pursuit skill appears to be a procedural effect mediated by and inhibitory mechanism rather than a consequence of differential endowments of learning ability.