Psychosocial predictors of chronic Post-Traumatic Stress Disorder in Sri Lankan tsunami survivors

This study aimed to determine whether psychological factors associated with Post-Traumatic Stress Disorder (PTSD) identified in Western samples generalize to low Social-Economical-Status (SES) populations in an underdeveloped Asian country. The study included 113 survivors of the 2004-tsunami on the south coast of Sri Lanka, recruited from 4 preschools and 10 villages for displaced persons. With logistic regressions the relations between interview-based PTSD diagnosis and psychological factors were assessed, controlling for putative confounders. Fifteen months post-trauma the prevalence of PTSD was 52.2%. Multivariate analyses indicated that negative interpretation of tsunami-memories was significantly (P < 0.005) related to PTSD. Of the putative confounders, gender and (non-replaced) lost work equipment were related to current PTSD (P < 0.05). The results indicate that the relation between negative interpretation of trauma memories and PTSD is quite universal, suggesting that interventions focusing on this factor may be important in treatment of tsunami survivors who are suffering from chronic PTSD.     

Orthographic vs. phonologic syllables in handwriting production

French children program the words they write syllable by syllable. We examined whether the syllable the children use to segment words is determined phonologically (i.e., is derived from speech production processes) or orthographically. Third, 4th and 5th graders wrote on a digitiser words that were mono-syllables phonologically (e.g. barque = [baRk]) but bi-syllables orthographically (e.g. barque = bar.que). These words were matched to words that were bi-syllables both phonologically and orthographically (e.g. balcon = [bal.kõ] and bal.con). The results on letter stroke duration and fluency yielded significant peaks at the syllable boundary for both types of words, indicating that the children use orthographic rather than phonological syllables as processing units to program the words they write.     

Responsibility Attribution And Helping Behaviour In The Ash Wednesday Bushfires

The theoretical and empirical literature on the attribution of responsibility and helping behaviour suggests that a causal relationship exists between the perception of a victim's responsibility for his or her distress and the observer's willingness to help. This relationship was examined in a study of the attributions Victorians made and the amount of help (donations) given to the victims of the Ash Wednesday bushfires. The survey responses of 372 subjects indicated that although many people attributed a considerable degree of responsibility to the victims, attributions were unrelated to subsequent helping behaviour. Instead, helping was mediated by feelings of personal obligation to lend assistance and feelings of sympathy for the victims. It is argued that attribution theory may not be relevant to serious situations where norms for helping are highly salient.     

Effects of the community mental health centers program on the growth of mental health facilities in nonmetropolitan areas

Using a quasi-experimental design, changes in the numbers of mental health facilities between 1964 and 1974 were examined for a sample of 50 nonmetropolitan catchment areas that established a Community Mental Health Center (CMHC) before January 1973 and a sample that did not. Compared to non-CMHC areas, CMHC areas had a slightly greater number of general hospital psychiatric units in 1974. Nevertheless, the rate of increase in such units over the 10-year period was not significantly different between the two types of areas. Other findings supported the conclusion that the number of outpatient and day/night facilities continued to increase in areas not participating in the CMHC program, but that the program produced even greater numbers of such facilities in areas that did participate. This growth, though, occurred both through introducing additional facilities and supplanting existing ones.     

Local rates of responding and reinforcement during concurrent schedules

The literature was searched for information about the local rates of responding and reinforcement during concurrent schedules. The local rates of reinforcement obtained from the two components of a concurrent schedule were equal when a long-duration changeover delay was used and when many sessions were conducted, except when the two components provided different simple schedules. The local rates of responding were equal under some conditions, but they differed when one component provided a ratio and the other an interval schedule. Across schedules, local rates of reinforcement changed with changes in the schedule of reinforcement. Local rates of responding did not change with changes in change-over-delay duration but did with changes in the changeover ratio and with changes in the programmed rates of reinforcement. The results generally conform to the Equalizing and Melioration Principles and help to clarify current statements of the Matching Law. The results also suggest that changes in the local rates of responding and reinforcement may be orderly across schedules.     

Cognitive style and relationship quality in married dyads

Recently, cognitive personality researchers have begun to explore the social and interpersonal relevance of cognitive individual difference variables. Embedded in these examinations, however, is a methodological issue that bears importantly on our understanding of the role of these cognitive orientations in social relations. Specifically, personality studies have typically employed experimentally created dyads which, by limiting the representativeness of the sample, potentially limits the generalizability of the findings to more enduring “real-life” dyads. In the present study, field dependence/field independence was examined as a potential mediator of relationship quality in married dyads. Consistent with Witkin's theory of psychological differentiation, it was predicted that spouses with relatively field-dependent partners and individuals from dyads with similar levels of differentiation would have fewer complaints. Results showed, contrary to the predictions, that husbands married to field-dependent wives and wives from matched dyads had more complaints about their marital relationships. These findings suggest the need for a careful evaluation of the role of cognitive style in the domain of intimate interpersonal relationships. Apparently, it may not be sufficient to generalize about the role of personality in social relationships from the results of studies employing experimentally created dyads or groups to other, more enduring and real-life types of social relationships.     

Repetition priming in simple addition depends on surface form and typicality

Repetition priming and recognition memory for numbers were measured in four experiments using single-digit addition. Results of the first two experiments indicate that when numbers were presented as number words and dot configurations, preexposure of the same problem in the same notation produced greater reaction-time benefit than did preexposure of the same problem in Arabic-digit notation. In contrast, when numbers were presented as Arabic digits, preexposure of the same problem in Arabic digit, number word, and dot notation produced the same amount of priming. In the third experiment, priming was shown to be greatest, for all three notations, when the task performed on preexposure trials (addition or multiplication) matched the task performed on repetition trials (addition). Results of the fourth experiment, measuring recognition memory, were comparable to the priming results in the sense that memory was superior when notation matched across repetitions if the test involved number words and dot configurations but not Arabic digits. These data are interpreted in terms of models of numerical cognition, and they support the hypothesis that the influence of surface form on repetition priming depends on the typicality of the input for the task.     

The biological affects: a typology.

This typology of biological affects is based on developmental-interactionist theory of motivation, emotion, and cognition. Affects--subjectively experienced feelings and desires--involve interoceptive perceptual systems based on primordial molecules that characterize neurochemicals. Biological affects involve primary motivational-emotional systems (primes) associated with hierarchically organized neurochemical systems in the brain, including subcortical (reptilian) and paleocortical (limbic) brain structures. Affects fulfill individualistic (selfish) functions (arousal, approach-avoidance, agonistic) and prosocial (cooperative) functions. Selfish and cooperative functions are associated respectively with the right and left hemispheres. Biological affects constitute the physiological bases for higher level affects: social affects (e.g., pride, guilt, shame, pity, jealousy), cognitive affects (e.g., curiosity, surprise), and moral affects.     

Nonverbal communication affect in children.

A paradign was tested for measuting the tendency of children to send accurate nonverbal signals to others via spontaneous facial expressions and gestures. This paradign was derived from studies on adults that suggest that women are more accurate nonverbal "sendres" than men in certain situations. Eighteeen male and 11 female preschoolers (aged 4 to 6 years) watched a series of emotionally loaded color slides while they were observed via a hidden television camera by their mothers. Results indicated that significant overall communciation occurred, with large individual differences in "sending ability" between children. There was no evidence of a large sex difference in sending ability in choldren, although on one measure girls were more accurate senders than boys when viewed by undergraduates. Sending ability was positively related to teacher's ratings of activity level, aggressiveness, impulsiveness, bossiness, sociability, etc., and negatively related ti shyness, cooperation, emotional inhibition and control, etc.     

A re-examination of local contrast in multiple schedules

Pigeons were presented with multiple schedules of alternating 90-sec components. When components in which grain was never presented alternated with components in which grain was presented on a variable-interval schedule, the average rate of responding in the variable-interval components increased, showing overall positive behavioral contrast. Unlike previous reports, this study found that the response rates for all birds increased toward the end of the variable-interval components as training proceeded. This increase in local response rate disappeared when the multiple schedule was composed solely of variable-interval components and reappeared when the variable-interval components were again alternated with extinction. This finding cannot be predicted or explained by recent theories of behavioral contrast based on autoshaping, and thus questions their sufficiency. We suggest that this local response-rate increase results from the predictable change from high to low density of reinforcement at the end of the fixed-duration component. Thus, the present effect apparently illustrates a different type of interaction between components of a multiple schedule than that described by previous theories of contrast. In a given procedure, either or both types of interaction may occur; neither provides a complete account of behavioral contrast.