The efficacy of stimulus fading and contingency management in the treatment of elective mutism: a case study

Stimulus fading techniques were compared to those of contingency management in the treatment of a 6-yr-old, electively mute girl. Experimental periods consisted of the mother rewarding the child for verbal and motor responses to scheduled tasks, while a stranger slowly entered the room and then gradually administered the task items as mother left the room. A timeout contingency for non-response to task items was also employed. Control periods consisted of a stranger administering the same tasks to the child under the same contingencies but without the presence of the mother or the use of stimulus fading. Experimental and control periods were alternated during each treatment hour. The stimulus fading procedure was found to be a necessary component of the treatment process. While the timeout contingency for non-response was found to facilitate treatment if combined with stimulus fading, it was completely ineffective without the stimulus fading.     

An Examination of the Lost-letter Technique1

The results of three investigations of the validity and economics of the lost-letter technique are reported. Although the return rate of the lost-letter technique was higher than in the case of more obtrusive survey techniques involving hand-distributed postcard questionnaires and mail surveys, the more obtrusive survey techniques were more economical to carry out, were more accurate in their predictions of election outcomes, and gave results more highly consistent among themselves than with the results obtained by the lost-letter technique. Furthermore, the results indicated that the act of returning a lost letter may not be strongly affected by the identity of the sender or addressee indicated on the letter.     

Life Skills: Adolescents' Perceptions of Importance and Competence

A previous classification of life skills was used to suggest issues relating to areas of adolescents' concerns involving relationships, leisure, jobs, education, preparation for the future, work, budgeting, health, social responsibility, and personal skills such as planning and decision-making. A questionnaire relating these concerns to young people's perceptions of the facets of importance, and their own knowledge, competence, sense of improvement, problems, and striving, was administered to a sample of 1,084 adolescents in senior schools and colleges of technical and further education. The results suggested a strong general factor for each facet, with some differentiation into groups of skills. The mean ratings suggested that the skills investigated were considered to be very important by young people, who in general also seemed optimistic about their competence. However, a small proportion expressed serious problems. Responses to the various facets were further examined in terms of group differences — by age, gender, educational context, ethnicity, economic status, and educational expectations. Many small but significant group differences were isolated. Finally, implications are drawn from this related research for schools and colleges in general and for guidance and counselling in particular.     

AVID: An intelligent CAI system for small computers

A computer-assisted instruction (CAI) system which includes facilities for interactive graphics and for limited natural language processing has been implemented on a DEC PDP-11 minicomputer. Lesson authoring aids permit inexperienced authors to create lessons with ease and permit transporting lessons to and from other systems. The system supports eight simultaneous independent users and provides facilities for student performance evaluation and record management.     

Dissemination and evaluation of marriage education in the Army

The effectiveness of marriage education was evaluated in two separate samples of primarily married couples in which at least one member of the couple was on active duty in the U.S. Army. The intervention was delivered by Army chaplains. Effects replicated well in the two samples, and demonstrated that marriage education was well received by this population and resulted in improvements in relationship functioning. Changes in relationship quality were examined separately for males and females, and also for couples in which both members of the couple were Caucasian as compared with all other couples. There were no significant differences in changes over time (i.e., from pre- to postmarriage education) among males and females or among couples with different ethnic makeup. These results have important implications for the generalizability of marriage education to diverse samples in nontraditional contexts.     

EFFECTS OF CHOICE MAKING ON THE SERIOUS PROBLEM BEHAVIORS OF STUDENTS WITH SEVERE HANDICAPS

This study assessed the impact of choice making on the serious problem behaviors of 3 students with severe autism and/or mental retardation. In the context of within-subject reversal designs, the results showed consistently reduced levels of problem behaviors (e.g., aggression) when the students were given opportunities to make choices among instructional tasks and reinforcers. Additional data showed no systematic differences in the rate of correct responding between the two conditions. The results are discussed in relation to the continuing search for effective, nonintrusive solutions to the occurrence of serious problem behavior.     

Processing speed and mental retardation: Deadline procedures indicate fixed and adjustable limitations

Brewer and Smith (1984) showed that control mechanisms mediating speed-accuracy regulation contribute to retarded-nonretarded differences in processing speed, with poorly controlled trial-to-trial RT adjustments underlying the greater RT variability of retarded individuals. In Experiment 1, response deadlines controlled processing time, thus minimizing the influence of such control mechanisms. The obtained speed-accuracy relations showed that retarded subjects were unable to match nonretarded subjects' accuracy when responding as rapidly, thus indicating structural limitations on processing speed. The results of Experiment 2 showed, however, that significant adjustments to retarded subjects' processing speed--exceeding those produced by practice--are achievable. Extended training at a short deadline led to tighter control of RT adjustments, with substantial improvements in mean RT when subjects transferred to a self-paced RT task.