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.     

An empirical test of two psychophysical models

Two theoretical relationships between sensitivity measures (Weber fractions, Ekman fractions, and their logarithms) and the exponents of the psychophysical power function were tested empirically with the brightness attribute. One model was based on Weber and Ekman fractions, the other on the logarithms of these measures. The stimulus parameters were time interval between standard and comparison targets and position of the standard in the luminance series. Weber fractions were based on data obtained by the method of constant stimuli, whereas Ekman fractions and exponents were based on data obtained by magnitude estimation. The results were in closer agreement with the theoretical predictions generated by the logarithmic model when group data were analyzed. With individual subjects, a detailed correspondence between fact and theory was not found with either model.     

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.     

The Effects of Self-Efficacy on Behavior in Escalation Situations

Two experiments were conducted to investigate the hypothesis that perceptions of self-efficacy influence, in various ways, behavior in escalation situations. Self-efficacy beliefs for finding oil were measured for 527 petroleum geologists as they decided, at increasing levels of negative feedback in the form of dry wells, whether to persist with an unproductive venture in petroleum exploration. Experiment 1 employed a within-subject design and found a significant main effect of both negative feedback and initial self-efficacy. Differences in intentions to escalate between low and high self-efficacy individuals were apparent at all levels of negative feedback. No moderating effect of self-efficacy, however, was discernible. Experiment 2 employed a between-subjects design and multiple regression analysis. Like Experiment 1, Experiment 2 revealed a significant main effect of negative feedback and initial self-efficacy. Post-feedback self-efficacy was found to mediate the effects of negative feedback on the escalation tendency. Implications of these results for the self-efficacy and escalation literatures are discussed.     

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.     

IMPROVING THE ACCURACY OF SELF-REPORTS OF ADHERENCE

Behavioral scientists who study socially important but difficult-to-measure behaviors often rely on self-reports. We evaluated the influence of three experimenter demands—demand for adherence, demand for accurate reports, and demand for accurate reports combined with a prompted recall strategy—on the accuracy of self-reports of adherence to a week-long prescribed regimen of twice-daily telephone calls. Self-reports of adherence were significantly more accurate in the accuracy demand/prompted recall group (p < .05). The analogue study should be replicated with other regimens and populations to determine the most effective strategies for enhancing the accuracy of self-reports.