Event-related brain potentials and subjective probability in a learning task

In a paired associate learning task, subjects responded to each presentation of a nonsense syllable by typing both a three-letter associate and a rating of their confidence that this response was correct or incorrect. Average event-related potentials (ERPs) elicited by the subsequent presentation of the actual paired syllable varied with the interaction of confidence and trial outcome. A larger amplitude P300 was elicited by syllables that informed subjects that they were correct when they thought they were incorrect or that they were incorrect when they thought they were correct than by syllables that confirmed subjects expectations. That this average ERP result was indeed an effect on P300 amplitude, and not an artifact of single-trial variability in P30O latency, was confirmed with a trial-by-trial latency adjustment procedure. Consistent with findings from other tasks, P300 amplitude varied inversely with the subj ective probability of the ERP-eliciting events.     

Visual psychophysics on the APPLE II: Getting started

Several routines are described for psychophysical procedures on the APPLE II. Method of adjustment and PEST routines are presented within short demonstration programs. Techniques for synchronized presentation of images in tachistoscope and motion displays are given, as well as methods for saving graphics images for later recall.     

The Type A Structured Interview: A behavioral assessment in the rough

The Type A behavior pattern is the focus of considerable research in behavioral medicine because of its causal relevance to coronary heart disease. The primary assessment of Type A behavior is a global rating made from a structured interview. From the perspective of behavioral assessment, this Structured Interview (SI) is important for two reasons. First, it provides an example of the superiority of an observed behavioral measure compared to self-report questionnaires for the assessment of an overt behavior pattern. Second, it provides a unique opportunity for the application of behavioral assessment technology. However, while the SI has demonstrated its clinical and research utility as a diagnostic procedure, its usefulness could be further enhanced in the areas of treatment selection and evaluation. The historical relationship between behavior and coronary heart disease is described. The development of the SI and the strengths of this assessment relative to other measurement approaches are reviewed. The standard questions and administration procedures for the interview are presented, along with several variations and modifications. Following this overview, the SI is discussed from the perspective of behavioral assessment.     

Pitfalls in Counseling Alcoholic Clients

Counseling alcoholic clients is a difficult problem for even the most seasoned counselor. Clients' abilities to use denial and manipulation demand a parallel counselor ability to identify dynamics properly, to deal with defenses, and to provide empathetic support while remaining emotionally noninvested. The unique dynamics of alcoholism demand that the counselor develop unique and innovative strategies within the counseling relation, literally to save the life of the client.     

Doing two things at once: The role of temporal compatibility

Performance in a periodically repeating keypress response was measured as a function of the relation between the response patterns required of the two hands. Compared to identical left- and right-hand responses, performance was degraded when the temporal periods of the left- and right-hand responses were not harmonically related. By contrast, performance was not degraded compared to the identical task control when the left- and right-hand responses had the same or harmonically related periods. These findings suggest a limitation in parallel generation of multiple time frames that is assumed to be associated with a late stage of central processing in which response commands are generated.     

VOCATIONAL VALUES AND EMPLOYMENT OUTCOMES OF THE DISADVANTAGED

There is conflicting opinion regarding the vocational values of disadvantaged persons. This study was conducted to examine vocational values and employment outcomes of 21 disadvantaged and 20 not-disadvantaged clients previously served by a U.S. Employment Service office. The Minnesota Importance Questionnaire (MIQ) was used to measure vocational values, and two measures of disadvantagement were compared with employment outcome. Only 2 of the 20 MIQ scales revealed significant differences, suggesting that there is a need to consider the individual's unique values rather than presume stereotyped needs. The two measures of disadvantagement correlated significantly with employment status at follow-up. The finding that only 43 percent of the disadvantaged were employed, in contrast to 90 percent of the not-disadvantaged, indicates a greater need for specialized services for disadvantaged clients.