Psychophysiological outcome of cognitive, behavioral and psychophysiologically-based treatments of agoraphobia

Psychophysiological process and outcome phenomena were analyzed to examine differential temporal patterns within and across cognitive, behavioral and physiologically-based treatments of agoraphobia. Eighty-eight severe and chronic agoraphobics with panic attacks (DSM-III) were randomly assigned to one of three treatments: Paradoxical Intention, Graduated Exposure or Progressive Deep Muscle Relaxation Training. Protocol therapists, whose treatment integrity was objectively monitored, conducted 12 two-hour weekly sessions. All subjects received programmed practice instructions concurrent with their primary treatment. Analyses revealed numerous significant reductions on in vivo psychophysiological measures for the relaxation condition, a few improvements for the exposure treatment and no effects for the paradoxical intention modality. The mediating role of pretreatment physiological reactivity in treatment outcome and follow-up status was examined and revealed no significant associations. Synchrony-desynchrony patterns were found to vary widely according to both treatment phase and the time interval between assessments. No between-group differences were observed on the proportion of synchronizers. However, synchronizers exhibited superior outcome and follow-up compared to desynchronizers on all domains except the physiological measures. Conceptual, methodological and clinical implications of these findings are discussed with recommendations for future research.     

Assessment of retrieval strategy in incidental, intentional, and inclusion tests with word-fragment cues

The purpose of this study was to assess retrieval strategy in incidental, intentional, and inclusion tests with word-fragment cues following a levels-of-processing manipulation at study. The results of Exp. 1 showed small levels-of-processing effects in incidental tests, and most subjects reported involuntary rather than voluntary retrieval of study-list words. In an intentional test, although levels of processing had a much greater effect, quite a few subjects also reported involuntary rather than voluntary retrieval of study-list words, and these subjects showed a smaller effect of levels of processing than subjects reporting voluntary retrieval. These results suggest that subjects given instructions for both voluntary and involuntary retrieval of study-list words in an inclusion test might not in fact attempt voluntary retrieval at all, but simply adopt an involuntary retrieval strategy. The results of Exp. 2 provided evidence to support this suggestion. The general implication is that where test contamination refers to subjects' failure to use retrieval strategies in accordance with test instructions, inclusion tests can be contaminated, as well as incidental or intentional tests, and that it is always necessary to obtain converging evidence about the actual strategies subjects use.     

Bisecting RT with lateralized readiness potentials: Precue effects after LRP onset

Recent work has sought to use the time at which the Lateralized Readiness Potential (LRP) first develops (LRP onset) as a temporal landmark to bisect experimental effects on reaction time (RT). Many studies have found experimental effects on the time between the signal and LRP onset, but few have found effects on the time between LRP onset and RT (LRP-RT interval). The primary goal of this study was to produce an effect on the LRP-RT interval. We employed precuing, a manipulation likely to influence motor-programming processes at the end of the RT interval. Subjects performed a 4-alternative choice-RT task in which a signal prompted a button-press with the index or middle finger on the left or right hand. Precues preceded the signals and were either informative, reducing the set of response alternatives from four to two, or uninformative. Besides RT and LRP, we also measured electromyographic (EMG) activity and the P300 ERP component. RT, P300 latency, and the interval between the signal and LRP onset were all shorter with informative than uninformative precues, but the timing of EMG activity relative to RT remained the same. Most importantly, precuing affected the LRP-RT interval. Implications for bisecting RT with LRPs and the identity of processes affected by precuing are discussed.     

An Ecologically Differentiated, Multifactor Model of Adolescent Network Orientation

The paper presents a test of an ecologically differentiated model of social network orientation for adolescents that distinguished between different social network reference groups (family, peers, and nonfamily adults). The model was tested in two consecutive studies. Study 1 describes initial model development (N = 120). Study 2 presents a confirmatory factor analysis with a second sample (N = 430) to replicate the factor structure developed in Study 1. Results supported a three-factor model of network orientation that differentiated between network reference groups. Analyses of concurrent and predictive validity indicated that orientation to network reference groups was differentially related to the perceived quality and frequency of support from members of respective social network groups. Group differences (gender, race) regarding network orientation to different network reference groups were consistent with studies of other social network processes. Implications for the study of the network orientation and the study of social networks more generally are discussed.     

Swiss Adolescent Drug Users' and Nonusers' Optimism About Their Future1

Swiss adolescents, aged 16 to 17 years, were asked about their past drug use, their intended drug use, their optimism about their future health, their negative emotions, and their well-being. On the basis of their self-reports, they were divided into 3 types of drug users: nonusers, experimenters, and frequent users. Compared with nonusers, experimenters and frequent users reported low optimism and more negative feelings. Females reported more negative feelings and less psychological well-being than did males, but the genders did not differ regarding optimism. Logistic regression demonstrated that optimism about future health was a protective factor for the intention to use drugs. Students who perceived themselves as less vulnerable to harm had in the past not used drugs and intended not to accept drugs when given the occasion. The implications of the findings for prevention of drug use are discussed.     

Lateralization of hand-movements in patients with affective psychoses during an interview situation: An attempt at a physiological interpretation

Summary The results of video analysis of non-verbal interview behavior of patients with affective psychoses were discussed. Characteristic differences were shown for the left-right distribution of certain hand movement types in studies of normal subjects by Kimura (1973) with an essentially comparable technique. A neurodynamic interpretation of such findings was attempted. First we discussed the shortcomings of current neuropsychological interpretations and concluded that they present a challenge to establish a conceptual framework, which would permit the resolution of both neurodynamic and developmental points of view. Finally, we examined the heuristic value of such a conceptual framework. We noted that it is marked by the concept of inter-hemispheric coordination, and applied this concept to our findings as well as to hypotheses in depression research obtained by other methods.     

Models for within-proposition representation tested by cued recall

A model is presented to account for the data from incremental cuing experiments that have been carried out to identify the representation of propositions in memory. In such experiments subjects first learn a list of sentences and are afterward cued for recall with words from the learned sentences. The model proposed distinguishes between a memory structure and stimulus and response processes. The all-or-none tendency in the data is captured by a Gestalt-like memory code. The model is compared with the stochastic theory of Anderson and Bower and the fragmentation hypothesis of Jones.