Extinction effects following interpolation of instrumental trials among response prevention periods

Two experiments evaluated the effectiveness of response prevention when prevention periods were interpolated with instrumental trials which permitted performance of the originally trained instrumental behavior. In Experiment 1, interpolation of instrumental escape trials under shock and nonshock procedures reliably reduced prevention's influence on performance and yielded extinction responding similar to that of pseudo-prevention controls. In Experiment 2 interpolation of instrumental escape trials under nonshock conditions yielded passive avoidance performance similar to that of pseudo-prevention controls but reliably different from that of a regular prevention group.     

The effects of computer-mediated vocational guidance procedures on the appropriateness of vocational preference

To assess the effectiveness of vocational guidance procedures proposed for inclusion in a computer-based vocational exploration system, 139 eleventh-grade male subjects were randomly assigned to three experimental groups and a control group. One group was given a computer-generated accuracy of self-knowledge feedback, another group was taught an occupational classification scheme, a third group experienced both. Utilizing a method of explicit comparison between students' measured characteristics and the measured characteristics of occupational norm groups, the results showed students in the groups receiving feedback increased in the appropriateness of the occupational level of their first occupational choice. In addition, students in the combined treatment group increased in the appropriateness of the level of their total occupational preferences. A delayed posttest indicated that these increases persisted.     

Effects of educational and career exploration system on vocational maturity

An experimental group of 792 tenth graders spent from 1 to 17 hr (average 3 hr) on ECES, a computer-based educational and occupational exploration system.Gains on a test of vocational maturity administered at the beginning and end of the school year were compared with a control group of 1453 tenth graders, matched on relevant variables. ECES users showed larger gains than nonusers in (1) degree of planfulness and (2) knowledge and use of resources for career exploration, as measured by the Career Development Inventory, not in information about education, occupations and career decision making. Gains were related to amount of time spent on ECES but male-female differences were not exhibited.     

Operant learning principles applied to teaching introductory statistics

A grade of A was given in an introductory statistics course for meeting a set of contingencies that included no work outside of class (except by request), near-perfect performance on exams following each unit of work in a programmed text, correction of all exam errors, self pacing of work, and the chance to finish the course early. A grade of incomplete was given otherwise. Correlations among performance measures failed to show any meaningful relationships between time taken to finish the course, errors made on exams, and errors made in the programmed text. Responses to a five-part questionnaire were overwhelmingly favorable to the course, but did not vary as a function of grade point average, time taken to finish the course, or number of errors made on exams. The uniformly high level of performance, the students' lack of interest in social contact with the instructor during class, and the absence of drop-outs are all attributed to the contingencies employed, chief among which, according to the instructor's judgment and student rankings, were self-pacing, frequent non-punitive exams and a guaranteed grade of A for near-perfect work at every stage.     

Useful Field of View and Other Neurocognitive Indicators of Crash Risk in Older Adults

Older adults represent a rapidly growing segment of the driving population. Although most older drivers are safe, research has shown that this group has more crashes per mile driven than most other age groups. The purpose of the present investigation was to examine the utility of a set of commonly used neuropsychological/cognitive tests in comparison to a newer measure of visual attention (Useful Field of View; UFOV®) in predicting state-recorded, at-fault crashes over the previous five years in a group of older adult drivers. Participants (N = 239) completed tests of mental status, visual attention, memory, and UFOV®. Results show that among all cognitive tests administered, UFOV® was most strongly related to crash involvement, with high levels of sensitivity (86.3%) and specificity (84.3%) at the standard cutoff score of 40% reduction. Practical implications for the assessment of crash risk are discussed.     

The colour naming of socially threatening words

An emotional Stroop task was used to investigate colour naming of socially threatening words in individuals who possess a repressive coping style. The Marlowe-Crowne scale (MC) and the Bendig version of the Taylor Manifest Anxiety Scale (MAS) were used to select repressor and control subjects, who subsequently completed the Stroop task. Repressors (high MC, low MAS) did not show an emotional Stroop effect, whereas low anxious (low MC, low MAS), high anxious (low MC, high MAS) and defensive high anxious (high MC, high MAS) all exhibited retarded colour naming of emotional words compared with neutral words. These results are discussed in terms of previous research in this area.     

Cluttering: A matter of perspective

The evolution of a discipline such as speech-language pathology pivots around three points: theoretical underpinnings, research questions and methodologies, and clinical acumen. Moreover, the advancement of a given discipline rests on the extent to which these three elements are integrated. Cluttering, however, has attracted little interest in the United States until rather recent times, having experienced a long hiatus of relative neglect by speech-language pathologists. This hiatus was preceded by an initial spurt of clinical insights from phoniatrists and logopedists originally trained in Europe during the early decades of this century.