Effects of depression on expectancy in sustained attention

The effects of expectancies generated during a pretest on the subsequent vigilance performance of depressed and nondepressed observers were assessed. Among the nondepressed, those who were exposed to a high signal probability during the pretest detected more signals in the main watch than those exposed to a low pretest probability, regardless of the signal probability in the vigil itself (high or low). This expectancy effect was not evident among the depressed. The vigilance decrement in both subject categories was steeper under conditions of low as compared to high test probability. These results indicate that depressed monitors do not demonstrate a deficit in attentional capacity. It is suggested that the nonperseveration of pretest expectancies among the depressed may stem from a lack of motivation to effortfully process information in the same manner as nondepressed observers.The authors would like to thank Mark Scerbo and Tom Lanzetta for their technical assistance.     

A comparative study of the impact of education vs. process groups for families of patients with affective disorders

This clinical project compares the relative impact of two types of multiple family groups on psychiatric inpatients and their families. Forty patients with a diagnosis of affective disorder, and their family members, were randomly assigned to a traditional multiple family group with a process orientation that emphasized support, destigmatization, and self-help about common problems; or to a psychoeducational multiple family group that emphasized the provision of information about the patient's illness and methods of coping with it effectively. Both groups, which met for four hours on a Saturday afternoon, were an integral part of an ongoing inpatient program specializing in the treatment of affective disorders. Pre- and post-measures were obtained regarding family and patient knowledge about affective disorders, level of personal distress, attitudes about the illness, and dyadic adjustment. In addition, both patients and family members were asked to rate their satisfaction with the group experience. A number of differences in knowledge, attitude and dyadic adjustment were found in the participants of both groups immediately following their respective group sessions, but there were only a few statistically significant differences between the two groups. Those who attended the psychoeducational session, however, reported significantly more satisfaction with the experience.     

The Gradual Deterioration of Syntax and Semantics in a Patient with Progressive Aphasia

FM is a progressive aphasic patient whose language comprehension we studied over a 4-year period. We developed a variety of implicit and explicit tasks to chart progressive changes in the representation of linguistic knowledge (in particular, syntax and semantics) and the automatic and controlled processes which operate on that knowledge. The representation of FM's semantic knowledge remained essentially intact over the years, but she became increasingly impaired at combining the meanings of words. She also showed progressive impairments in the processes of syntactic combination. Thus, FM's disease resulted in a progressive inability to engage in those combinatorial processes necessary for the normal comprehension of a spoken utterance. This is not a selective deficit in the traditional sense of the term, since aspects of both syntax and semantics are implicated; but it is selective in the sense that other aspects of language comprehension remain intact.     

Use of derivational morphology during reading

This study examines contrasting predictions made by models of the lexicon in which stem morphemes play a central accessing role versus models in which stem morphemes play no particular role. Models which assign an independent role to morphemes predict that derivationally suffixed words have both inhibitive and facilitative effects on the reading process. A reading comprehension task was administered to good and poor high-school-age readers to assess their use of both the lexical-semantic and syntactic information provided by morphemes in derivationally suffixed target words. The subjects appeared to use the stem morpheme of a derivationally suffixed word to establish overall sentence meaning but often did not use the syntactic information contained in the derivational suffix. The failure to use syntactic information in the suffix was significantly greater for lower-ability readers than for those reading at or above grade level. The results offer support for morphologically organized models of the lexicon.     

Adolescents' concepts of depression among their peers

The purpose of this study was to quantify the behavioral cues adolescents use to identify their peers as depressed in order to gain a more accurate understanding of the factors associated with adolescent depressive symptomatology. Because of limited information about depression in adolescents, a questionnaire was constructed to explore the concept in this age group. Ninety-nine middle and high school students, 12 to 18 years old, completed the questionnaire which included open-ended and forced choice questions. The results indicated that social isolation was an important component of adolescents' concepts of depression among their peers. Subjects felt that there was a higher frequency of alcohol and marijuana use among depressed as compared to non-depressed peers. Eighty-six percent of the subjects believed that most depressed adolescents had suicidal thoughts, but only 35% believed that most depressed adolescents had attempted suicide. Factor analyses of the subjects' responses to the open-ended questions delineated several underlying dimensions of depressive symptomatology which adolescents appear to use in identifying their peers as depressed.     

MANIPULATION OF POTENTIAL PUNISHMENT PARAMETERS IN THE TREATMENT OF SELF-INJURY1

The self-injurious behavior (SIB) of a blind, profoundly retarded male was observed within a field setting as multiple forms of punishment were applied. The effects of hair-tug punishment were first systematically examined, then hair-tug and electric shock punishment were administered in varing ratios (of punishment deliveries per SIB response) supplemented by continuous restraint contingencies and made contingent on recurrent antecedents of SIB cycles. Treatments were applied over six months of consecutive daily sessions ranging from 30 min to 8 hr duration. Posttreatment followup observations were taken 12, 24, and 34 months after treatment. Partial suppression was produced as a direct function of hair-tug punishment in the initial phase. A generally progressive decrement was produced on already lowered SIB rates with the succeeding components of the treatment package. Extended periods of total SIB suppression occurred as punishment was rendered contingent on antecedent components of each SIB response cycle. Followup observations of nearly 3 yr duration indicated total suppression generalized over all settings in which the subject functioned. The findings were related to the contrasting limits prevailing in most reports of punishment-based SIB suppression.